ALBERT

Description: Bram, K.: Logging under Extreme Conditions in the Super-Deep Borehole KTB-Oberpfalz HB. P. 3-26. Bram, K., Draxler, J. K., Zoth, G.: Achievements in Logging Infrastructure and HEL-Tool Development. P. 27-48. Bram, K.: Information on the Borehole KTB-Oberpfalz HB. P. 49-62. Bram, K., Draxler, J. K.: Acquisition, Presentation, Handling, Distribution and Archive of Data. P. 63-70. Draxler, J. K.: Logging Activity in the Borehole KTB-Oberpfalz HB: Interval 6013.5 m - 9101.0 m (driller's depth). P. 71-90. Draxler, J. K.: Intermediate Logging. P. 91-118. Draxler, J. K.: Logging Series. P. 119-268. Draxler, J. K.: New Tools. P. 269-284. Hirschmann, G., Lapp, M.: Evaluation of the Structural Geology of the KTB Hauptbohrung (KTB-Oberpfalz HB). P. 285-308. Kück, J.: Electrical Resistivity Anomalies in the super-deep Borehole KTB-Oberpfalz HB. P. 309-322. Kück, J.: Accuracy of the Borehole Horizontal Projection. P. 323-326. Brudy, M., Zoback, M.D., Huber, K., Bäßler, H., Kück, J., Fuchs, K.: Stress Orientation Profile to 8.6 km Depth in the KTB Main Borehole. P. 327-350. Gritto, R., Kaelin, B., Johnson, L. R.: Small Scale Crustal Structure: Consequences for Elastic Wave Propagation at the KTB Site. P. 351-366. Kästner, U.: Migration of Vertical Seismic Profiles Exploiting the Information from Three-Component Observations. P. 367-390. Thomas, R., Fertig, J., Klöckner, M., Körbe, M., Müller, B., Rehling, J., Rehmann, V., Tormann, M., ISO'89: KTB 3D-Steilwinkelseismik am DEKORP Processing Center Clausthal. P. 391-416. Cerv, V., Pek, J., Praus, O.: MT and MV Measurements in SW Bohemia. P. 417-460.

Description: Bram, K.: Logging and testing in the superdeep borehole KTB-Oberpfalz HB: Concept and first results of the depth interval 0 - 6018 m. p. 3-21. Zoth, G.: Logging Center. p. 25-57. Bram, K., Kück, J.: Information on the Borehole KTB-Oberpfalz HB. p. 61-65. Draxler, J.: Logging Programme. p. 69-73. Draxler, J., Kück, J.: Logging Activity in the Borehole KTB-Oberpfalz HB. p. 77-83. Draxler, J.: Intermediate Logs. p. 87-93. Draxler, J.: Logging Operations at Casing Depth 6018.0 m (driller's depth). p. 97-175. Draxler, J.: New Tools. p. 179-183. Hirschmann, G., Kück, J.: Data Evaluation and Reports: KTB Hauptbohrung - relations between the borehole deviation and the geological structure. p. 187-189. Kück, J.: Data Evaluation and Reports: BGLQUICK and MUDQUICK quicklook data plots. p. 191-197. Sturmeit, K.-D.: Data Evaluation and Reports: SEL - A computer program to manage and present data of downhole measurements. p. 199-213. Zoth, G.: Data Evaluation and Reports: Temperature measurements during the 6000 m logging campaign in the KTB-Oberpfalz HB. p. 215-217. Bram, K., Gatto, H.: Data Evaluation and Reports: Determination of sonic velocities from KTB borehole acoustic logs. p. 219-235. Stoll, J.: Data Evaluation and Reports: A Mise-a-la-Masse experiment for detecting an electric network in cataclastic zones around the KTB-site. p. 237-250. Gatto, H.: Data Evaluation and Reports: Determination of elements through geochemical logging in crystalline rocks of the KTB-Oberpfalz HB. p. 251-264. Peching, R., Wohlenberg, J.: Data Evaluation and Reports: EFA-LOG - The upper 3 km of the KTB-Hauptbohrung. p. 265-280. Brudy, M., Fuchs, K., Zoback, M. D.: Data Evaluation and Reports: Stress Orientation Profile to 6 km Depth in the KTB Main Borehole. p. 281-300. Engeser, B., Huenges, E., Kessels, W., Kück, J., Wohlgemuth, L.: Data Evaluation and Reports: The 6000 m hydrofrac test in the KTB main borehole design, implementation and preliminary results. p. 301-336. Kessels, W., Kück, J.: Data Evaluation and Reports: Hydraulic communication in crystalline rocks between the two boreholes of the Continental Deep Drilling Programme in Germany. p. 337-365.

Description: Kessels, W.: Kaliberauswertung der in der KTB-Oberpfalz VB bis zum Ende der Bohrarbeiten durchgeführten Kalibermessungen in 25 Meter Bohrlochabschnitten. p. 219-229. Gatto, H., Casten, U.: Bohrlochgravimetrisch ermittelte Dichte (RHOG) im Vergleich zur Logdichte (RHOB). p. 247-263. Gatto, H.: Vergleich der Absorption thermischer Neutronen gemessen mit den Geräten TDT-P und GLT (Schlumberger) sowie PDK-100 (Western Atlas Wireline Services). p. 265-276. Gatto, H.: Vergleich von Messungen dreier gebräuchlicher Bohrloch-Orientierungssysteme. p. 277-297. Zoth, G.: Temperaturmessungen nach Abschluß der Bohrarbeiten in der Bohrung KTB-Oberpfalz VB. p. 299-313. Gatto, H.,Bücker, C.: Vergleich der Gesteinsdichte mittels Messungen von Schlumberger (litho-density log) und an Kernen durch das Feldlabor. p. 231-245.

Description: Fiala, J., Patocka, F.: The evolution of Variscan terranes of the Moldanubian Region, Bohemian Massif. p. 1-8. Bankwitz, P., Plotnikov, L. M.: Suturen in der mitteleuropäischen Erdkruste und die Position von KTB (Eine Diskussionsbemerkung). p. 9-18. Kachlik, V.: The Kladska unit - petrological and structural evidence for Variscan thrusting of the Marianske Lazne Complex over the Saxothuringian terrane (West Bohemia). p. 19-31. Chab, J., Zacek, V.: Metamorphism of the Teplá Crystalline Complex. p. 33-37. Mlcoch, B.: The geological structure of the crystalline basement below the North Bohemian brown coal basin. p. 39-46. Rohrmüller, J., Stettner, G.: Die KTB-Umfeldbohrungen des Bayerischen Geologischen Landesamtes. p. 47-62. Hirschmann, G., Stettner, G.,Rohrmüller, J.: The lithological units of the northern ZEV. p. 63-74. Walter,H., Krentz,O.: Zum Vorkommen organischer Reste in Metamorphiten der Kontinentalen Tiefbohrung Oberpfalz (Vorbohrung). p. 75-82. de Wall, H., Duyster, J., Hirschmann, G., Kontny, A., Lich, S., Spangenberg, E.: Die Störungszone in 7 km Tiefe - Ursachen eines seismischen Reflektors. p. 83-96. Schulte, B., Blümel, P.: Cenozoic Degradation History at the Western Margin of the Bohemian Massif. p. 185-190. Friedrich, D., Soffel, H., Weber, K.: Beziehung zwischen Gefüge und Anisotropie der magnetischen Suszeptibilität (AMS) von Amphiboliten aus der Kontinentalen Tiefbohrung und ihrem Umfeld. p. 109-122. Peterek, A., Hirschmann, G., Schröder, B., Wagner, G. A., Bischoff, R., Coyle, D. A., Haack, U., Lich, S., Rauche, H., Rust, S., Semmel, A., Stettner, G., Stöckhert, B., Umsonst, T., Wemmer, K., Zulauf, G.: Spät- und postvariszische tektonische Entwicklung im Umfeld der Kontinentalen Tiefbohrung Oberpfalz (KTB). p. 123-148. Hirschmann, G.: Bemerkungen zur Ausgangssituation und den Stadien der spätvariszischen Entwicklung aus regionaler Sicht. p. 149-155. Siebel, W.: Inferences about magma mixing and thermal events from isotopic variations in redwitzites near the KTB site. p. 157-164. Harms, U., Hölzl, S.: Lamprophyres from the KTB: petrogenetic implications from whole-rock geochemistry and Sr and Nd isotopes. p. 165-178. Menzel, D., Schröder, B.: Geologische Kriterien zur Unterbau-Exhumierung im Naab-Gebirge. p. 179-184. Schröder, B.: Cenozoic Degradation History at the Western Margin of the Bohemian Massif. p. 185-190. Suk, M.: The role of the present erosion level in the interpretation of the Bohemian Massif Hercynides. p. 191-199. Pflug, H.-D., Prössl, K. F.: Palynologie in der Kontinentalen Tiefbohrung - eine Erwiderung. p. 200.

Description: The Institute of Seismology, University of Helsinki (ISUH) was founded in 1961 as a response to the growing public concern for environmental hazards caused by nuclear weapon testing. Since then ISUH has been responsible for seismic monitoring in Finland. The current mandate covers government regulator duties in seismic hazard mitigation and nuclear test ban treaty verification, observatory activities and operation of the Finnish National Seismic Network (FNSN) as well as research and teaching of seismology at the University of Helsinki. The first seismograph station of Finland was installed at the premises of the Department of Physics, University of Helsinki in 1924. However, the mechanical Mainka seismographs had low magnification and thus the recordings were of little practical value for the study of local seismicity. The first short-period seismographs were set up between 1956 and 1963. The next significant upgrade of FNSN occurred during the late 1970’s when digital tripartite arrays in southern and central Finland became fully operational, allowing for systematic use of instrumental detection, location and magnitude determination methods. By the end of the 1990’s, the entire network was operating using digital telemetric or dial-up methods. The FNSN has expanded significantly during the 21st Century. It comprises now 36 permanent stations. Most of the stations have Streckeisen STS-2, Nanometrics Trillium (Compact/P/PA/QA) or Guralp CMG-3T broad band sensors. Some Teledyne-Geotech S13/GS13 short period sensors are also in use. Data acquisition systems are a combination of Earth Data PS6-24 digitizers and PC with Seiscomp/Seedlink software or Nanometrics Centaurs. The stations are connected to the ISUH with Seedlink via Internet and provide continuous waveform data at 40 Hz (array) or 100-250 Hz sampling frequency. Further information about instrumentation can be found at the Institute’s web site (www.seismo.helsinki.fi). Waveform data is available from the GEOFON data centre.

Description: The plate tectonic concept has nearly revolutionized the geo-sciences in the last decades. Many geodynamical, geophysical and geological phenomena could be understood for the first time. The investigation of the present-day global crustal kinematics is a crucial contribution which can be delivered by space geodesy only. Since the beginning of the MERIT-Campaign continuous good quality laser ranging data to LAGEOS are available. Using these data a precise estimation of present-day global-scale tectonic motion is possible. During the WEGENER/MEDLAS project the worldwide tracking network has been densified by a number of fixed and mobile stations in the southern Europe and eastern Mediterranean. Having now for a number of sites three to four occupations within four years significant site motions can be extracted. The derived motions are essential input information for deformation analyses and the interpretation of plate tectonic parameters.

Description: Casten, U.: Gravimetrie in der KTB-Pilotbohrung. p. 23-39. Bosum, W., Geipel, H.: TFM (Triaxial Fluxgate Magnetometer) - Messungen in der KTB-Oberpfalz VB von 1180 m bis 2750 m. Meßergebnisse und erste Interpretation. p. 43-69. Kuhnke, F., Musmann, G.: KTB-Hochtemperatur Drei-Komponenten-Magnetometer. p. 71-109. Ponomarey, V. N., Gluhih, I. I., Astrahancev, J. G., Badjin, G. W.: Magnetometrische Untersuchungen in der Kontinentalen Tiefbohrung KTB-Oberpfalz VB. p. 111-114. Bram, K.: Vorbereitung und Durchführung von Magnetikmessungen in der KTB-Oberpfalz VB durch das Institut für Geophysik, Sverdlovsk, UdSSR. p. 115-118. Krammer, K., Pohl, J.: Das Suszeptibilitätslog der Bohrung KTB-Oberpfalz VB von 27 m bis 3980 m. p. 119-134. Steveling, E., Spitzer, K., Leven, M.: Messungen mit dem Göttinger Bohrlochmagnetometer zur vertikalen Gradientensondierung in der KTB-Oberpfalz VB. p. 135-156. Grinat, M.: Messungen der Induzierten Polarisation in der KTB-Oberpfalz VB. p. 205-206. Winter, H., Stoll, J., Aulbach, E.: Die neue Eigenpotential-Bohrlochsonde - Erste Ergebnisse in der KTB-Oberpfalz VB. p. 159-177. Bahr, K., Eisel, M.: Vertikale tellurische Pulsationen in der KTB-Vorbohrung: Laterale Leitfähigkeitskontraste und virtuelle zeitliche Variationen des Eigenpotentials. p. 179-189. Grinat, M.: Messungen der induzierten Polarisation. p. 191-204. Schepers, R.: FACSIMILE - A new acoustic borehole imaging tool. p. 209-222. NN: Variable Acoustic Low Frequency System (VAL) der Firma Petrodata, Zürich. p. 223-226. Jobmann, M.: Thermischer Injektionstest und Temperaturmessung nach sechsmonatiger Standzeit in der KTB-Oberpfalz VB. p. 229-243. Burkhardt, H., Honarmand, H., Pribnow, D.: First results of thermal conductivity measurements with a borehole tool for great depths. p. 245-258. Stiefel, A.: Gegenstrom-Wärmetauscher-Experiment und Temperaturangleich in der KTB-Oberpfalz VB vom 09. bis 19. März 1990. p. 259-281. Reifenstahl, F., Stober, I.: Absenk-/Injektionstests und Leitfähigkeits-Fluid-Logging in der KTB-Oberpfalz VB. p. 285-313. Kessels, W.: Zielsetzung und Durchführung hydraulischer Untersuchungen in der Bohrung KTB-Oberpfalz VB im Langzeitmeß- und Testprogramm. p. 315-339. Zoth, G.: Erprobung eines Multifluidsamplers (Prototyp) der Firma Schlumberger. p. 341-342. Zoth, G.: Test des LASL-Fluidprobennehmers im Hinblick auf den Einsatz in der Hauptbohrung. p. 343-350. Baumgärtner, J., Rummel, F., Zoback, M. D.: Hydraulic Fracturing in situ Stress Measurements to 3 km Depth in the KTB Pilot Hole VB. A Summary of a preliminary data evaluation. p. 353-399. Heinemann, B., Mastin, l., Fuchs, K., Zoback, M.: Auswertungen der Bohrlochgeometriedaten der KTB Vorbohrung von 500 bis 4000 m Tiefe; Analyse der Breakout-Orientierungen im Hinblick auf das herrschende Spannungsfeld. p. 401-431. Zoth, G.: Test des 6-Arm Kalibermeßgerätes (Prototyp). p. 433-436. NN: Das Mechanical Sidewall Coredriller Tool der Fa. Schlumberger. p. 437. Schweitzer, J., Peterson, C.A.: Logging with a Germanium Spectrometer. p. 441-449. Draxler, J.: Preparation and operation of the prototype Germanium Detector Tool from Schlumberger-Doll Research, Ridgefield, Conneticut, USA. p. 451-458.

Description: During the 3D seismic reflection survey within the project Integrated Seisrnics Oberpfalz 1989 (ISO89) the vibroseis source signals were recorded simultaneously with five threecomponent geophone borehole chain SEKANS or a single threecomponent borehole geophone, respectively, in the KTB pilot hole. The aim was to measure the traveltimes of direct waves in the depth range between 3220 and 3420 m in order to deduce spatial velocity inhomogeneities between surface and recording depth from traveltime residuals in the surroundings of the KTB. These data shall be used for improved static corrections if distinct from statics obtained by short refraction lines and first arrival analysis of surface data. A short description of the method is given which is based on approximation by least square fitted planes. Data examples and preliminary results are presented.

Description: The tool chain SEKAN 5 developed and constructed by PRAKLASEISMOS was proved to be capable of withstanding long-term operation under the given pressure and temperature conditions in a chemically active Dehydrill HT mud in the KTB Oberpfalz VB lA (350 bar, 110 °C, pH 10-11). The tool comprises five identical seismic receiver sondes which are equipped with a three-component receiver system, an electrically driven clamping unit and a magnetic compass system. The results of the reference tests and the measured compass values were subjected to critical checks. For the observation period the reference tests on different days for each individual sonde indicated good agreement with respect to specific signal forms. The differences in orientation determined from the seismic data and the compass values are between -11 degrees and -26 degrees. The cause of the differences can be explained in that the wave paths lie outside of the observation plane.

Description: The high reflectivity of the upper and middle crust of the Oberpfalz, both for near vertical and wide-angle reflections, was one reason for selecting this area as site for the German Continental Deep Drilling Program KTB. A peculiarity in the middle crust beneath the KTB site is the so-called Erbendorf-Body (EB) giving rise to extremely strong wide-angle reflections. It deserves special interest because its position right on the border between the Saxothuringian and Moldanubian zones of the Vari scan fold belt, the unusual high p-wave velocities (over 7.0 km/s) in its lower part at 11 to 14 km depth, and associated dipping reflectors suggest a possible lower crustal origin of the EB. A specially designed and so far unique wide-angle 3D-survey was carried out as part of the program "Integrated Seismics Oberpfalz 89" for investigating the spatial extent, the velocity distribution and the internal structure of the EB. The first results show clearly that the EB ist not a local phenomenon beneath the DEKORP4 line, but that it exists, yet with remarkable complexities, beneath the whole covered area between the Franconian Line and the Falkenberg granite complex. The wide-angle shots were also recorded by four 3-component geophones in the KTB pilot hole at 3195 to 3295 m depth and provided convincing evidence for s-wave splitting in the upper crust SE of the KTB location. This anisotropy effect seems to be related to the overall strike and dip of rock foliation in the zone of Erbendorf-VohenstrauB (ZEV).

Description: Data are presented from integrated special experiments which have been performed in conjunction with a seismic 30 reflection survey within the framework of IS089 ( Integrated Sei smi cs Oberpfal z 1989) coordinated by DEKOR(PG erman Continental Seismic Reflection Program) between July and Novembero f 1989. The main objective was to study the nature of P- and S-wave reflections and velocities, the Poisson's ratio and the seismic anisotropy in a medium of crystalline rocks around the KTB site (Continental Deep Drilling Program), where the borehole has reached a depth of 4000 m. A digital 5-unit geophone chain with 25 m spacing and three components was used for downhole recording. The program described here consists of: 1) shearwave 2D reflection profiling (SCMPw} ith two 10-12 km long lines crossing the KTB-site, source: 2 horizontal vibrators with different orientations, 3-component recording; 2) shearwave moving source profiling (S-MSP); downhole recording of the source points of the SCMP; 3) vertical seismic profiling (VSP) down to 3660 m with different source azimuths and offsets (zero-offset, 4 km, 8 km); P- and S-wave sources: explosives, horizontal and vertical vibrators, and horizontal hammer techniques. 4) multiple azimuth shearwave experiment (MASE) with 4 km and 8 km offset and horizontal vibrator sources (radial and transversal orientation). The VSP surveys display steeply dipping reflections, increasing in number below 3000 m depth. Horizontal structures, preferentially seen in the surface profiling, are the exception. Polarization analysis of shearwaves shows dominant azimuths in shearwave splitting which correlate with maximum horizontal stress (N 158° E) and with azimuth and dip of foliation.

Description: The moving source profiling (MSP) measurements are done by moving seismic sources along a surface line crossing the well site while a chain of geophones, placed within the well bore at a certain depth, records the seismic response. A multifold coverage of the subsurface can be obtained by repeating the source profile for a number of different geophone depths. This idea of altering the conventional vertical seismic profiling (VSP) geometry to allow illumination of subsurface structure away from the well is an attractive idea because it is designed to better locate horizons below the drill bit. If these target horizons can be correlated with reflectors in usual seismic profiles, recorded on the surface, the latter can be calibrated by the MSP results. Two MSP experiments were realized in the KTB pilot borehole. The first (MSP 1) included two N-S and E-W orientated source profiles of 10 km length and a single threecomponent geophone at 3585 m depth. Later a full MSP experiment (MSP 2) was run for one NE-SW orientated source profile and 20 different geophone depths. The source line was extended 7 km to the Northeast and 3 km to the Southwest of the well. A vibrator source produced seismic signals every 50 m. These shots were recorded by three-component geophones at depths from 3210 m to 3685 m with 25 m intervals resulting in a 20-fold coverage of the illuminated subsurface. Due to the difficulties encountered in crystalline environments, different processing techniques were combined for interpretation of the MSP data set. Aside from comparing measured first-break times with theoretical ones to determine seismic velocities of the overburden an MSP-CDP transformation for migration were applied. The steeply dipping boundary of the Falkenberg granitic intrusion was mapped as a distinct velocity contrast east of the KTB well. On the other hand, some remarkable seismic reflectors at depths between 4000 m and 10000 m are predicted to be hit by the future KTB main borehole.

Description: Dietrich, H.-G., Wöhrl, Th.: Part A: Report of the KTB field laboratory - Drilling and Sampling. p. 1-14. Duyster, J., Figgemeier, Chr., Godizart, G., Hoffmann, A., Kontny, A., Lich, S., Machon, L., Pribnow, D., Rauen, A., Röckel, Th., Spangenberg, E., Umsonst, T., de Wall, H., Winter, H., Wöhrl, Th., Dietrich, H.-G.: Part A: Report of the KTB field laboratory - The lithological profile of the KTB Hauptbohrung, 6000 - 7220 m: Geology, Geochemistry and Geophysics. p. 15-63. Harms, U., Lich, S., Pechnig, R., de Wall, H.: Part B: Geoscientific Investigations - Gneisses of the KTB Vorbohrung and Hauptbohrung: I. Lithological Units, Subdivision and Correlation. p. 67-74. Müller, H.: Part B: Geoscientific Investigations - Gneisses of the KTB Vorbohrung and Hauptbohrung: II. Source rocks and petrogenesis. p. 75-78. Harms, U., Godizart, G.: Part B: Geoscientific Investigations - Formation of metabasic rocks: geochemical interpretation of core and cuttings data. p. 79-82. Böhn, B., Okrusch, M.: Part B: Geoscientific Investigations - Petrology and interpretation of metabasic rocks in the KTB main hole. p. 83-86. Weber, K., Lapp, M., Oncken, O.: Part B: Geoscientific Investigations - The Basal Units of the Erbendorf-Vohenstrauß-Zone. - Attempted Prognosis for the Suspected Lithology at the Final Depth of the KTB. p. 87-88. Lapp, M., Oncken, O., Weber, K.: Part B: Geoscientific Investigations - Structural Development of the Saxothuringian and Bohemian Units at the South End of the Erbendorf-Vohenstrauß Zone (ZEV). p. 89-91. Fiala, J., Zdenek, V.: Part B: Geoscientific Investigations - Lithology and tectonic evolution of the Saxothuringicum - Moldanubicum transition zone, West Bohemia. p. 93-95. Tanner, D., Schuster, J., Behrmann, J. H., O'Brien, P. J.: Part B: Geoscientific Investigations - New clues to the Moldanubian puzzle: structural and petrological observations from the Waldmünchen area, eastern Bavaria. p. 97-102. Godizart, G., Zulauf, G.: Part B: Geoscientific Investigations - Ductile normal faults in the KTB Hauptbohrung - Evidence of late Variscan extensional collapse. p. 103-105. Peterek, A., Maier, M., Bankwitz, E., Bankwitz, P., Franzke, H.-J., Rauche, H., Schröder, B.: Part B: Geoscientific Investigations - Contribution to the late- and post-Variscan Tectonic Evolution at the Western Margin of the Bohemian Massif. p. 107-110. Zulauf, G., Oncken, O.: Part B: Geoscientific Investigations - Brittle and brittle-ductile deformation in the KTB Hauptbohrung. p. 111-114. Schulte, B.: Part B: Geoscientific Investigations - Late cordierite in the Zone of Erbendorf-Vohenstrauß (ZEV): evidence of isothermal uplift of parts of the western ZEV. p. 115-120. Scherer, T., Agel, A., Hafner, S. S.: Part B: Geoscientific Investigations - Determination of uplift rates using EPR investigations of quartz. p. 121-124. Jacobs, J., Hejl, E., Van den Haute, P., Wagner, G. A.: Part B: Geoscientific Investigations - A preliminary tectono-thermal model for the KTB deduced from apatite, zircon and sphene fission-track analysis. p. 125-128. Wemmer, K., Ahrendt, H.: Part B: Geoscientific Investigations - Age determinations on retrograde processes in rocks of the KTB and the surrounding area. p. 129-131. Kreuzer, H., Henjes-Kunst, F., Seidel, E., Schüssler, U., Böhn, B.: Part B: Geoscientific Investigations - Ar-Ar spectra on minerals from KTB and related medium-pressure units. p. 133-136. Reichert, C., Dürbaum, H.-J., Hirschmann, G., Sadowiak, P., Wiederhold, H., Stiller, M.: Part B: Geoscientific Investigations - Thickness and signature estimation of the SE1 seismic event at the KTB Oberpfalz. p. 137-139. Hirschmann, G.: Part B: Geoscientific Investigations - KTB Hauptbohrung - what's beneath the seismic reflector SE1 ? p. 141-144. Jahns, C., Rabbel, W.: Part B: Geoscientific Investigations - Shallow seismic anisotropy surveying in the area of the KTB-location Oberpfalz (Germany). p. 145-148. Körbe, M., Thomas, R.: Part B: Geoscientific Investigations - Preliminary Interpretation of the 3D-Seismic Survey at the KTB-Location. p. 149-152. Spangenberg, E., Umsonst, T.: Part B: Geoscientific Investigations - Lithology and seismic impedance at KTB - a first correlation. p. 153-156. Xiao-Ping, L.: Part B: Geoscientific Investigations - Estimation of Seismic Attenuation from VSP Data. p. 157-159. Xiao-Ping, L., Ru-Shan, W.: Part B: Geoscientific Investigations - Investigation of Random Heterogeneties in the Crust by the KTB. p. 161-163. Kück, J.: Part B: Geoscientific Investigations - Borehole geometry and breakout development in the KTB main borehole from BGT logging. p. 165-169. Braun, R.: Part B: Geoscientific Investigations - Investigation of Breakout- Mechanisms. p. 171-174. Wittke, W., v. Schmettow, Th.: Part B: Geoscientific Investigations - The Influence of Selected Parameters on the Borehole Stability of the Continental Deep Drilling (KTB) Main Borehole. p. 175-178. Lempp, Ch., Natau, O., Holl, A., Althaus, E.: Part B: Geoscientific Investigations - Influence of fluids on the stability of the KTB open hole below 6000 m. p. 179-182. Schetelig, K.,Azzam, R.,Kläsener, R.: Part B: Geoscientific Investigations - Borehole break-outs and their relation to mechanical and physical properties of KTB core samples. p. 183-186. Keller, S., Natau, O.: Part B: Geoscientific Investigations - High temperature direct shear test parameters of foliations in gneisses of the KTB-pilot-hole. p. 187-190. Rummel, F., Zoback, M. D.: Part B: Geoscientific Investigations - Hydrofrac Stress Profile in the KTB Boreholes VB and HB. p. 191-194. Brudy, M., Fuchs, K., Zoback, M. D.: Part B: Geoscientific Investigations - Stress Orientation Profile to 6 km depth in the KTB Main Borehole. p. 195-197. Natau, O., Röckel, Th.: Part B: Geoscientific Investigations - Orientation of the In-Situ Stress Field Determined from Drilling Induced Fractures, Centerline Fractures, Core Disking at the KTB Drill Site. p. 199-202. Röckel, Th., Natau, O.: Part B: Geoscientific Investigations - Estimation of the Maximum Horizontal Stress Magnitude from Drilling Induced Fractures and Centerline Fractures at the KTB Drill Site. p. 203-209. Dahlheim, H.-A.: Part B: Geoscientific Investigations - Earthquake-parameters and stress-field determination from events near the KTB-drill site. p. 211-212. Bankwitz,P., Bankwitz,E.: Part B: Geoscientific Investigations - Stress analysis on KTB drill cores derived from fractographic features. p. 213-218. Durham, W.B.: Part B: Geoscientific Investigations - Topographic Measurement of Disking Fractures from KTB Pilot Hole, Depth 3606 m. p. 219-222. Lich, S., Duyster, J.: Part B: Geoscientific Investigations - Shape and fracture analysis on cuttings - KTB Hauptbohrung. p. 223-225. Vollbrecht, A., Dürrast, H., Weber, K.: Part B: Geoscientific Investigations - Open Microcracks: Indicators for In situ Stress Directions. p. 227-230. Vollbrecht, A., Olesen, N. O., Schmidt, N. H., Weber, K.: Part B: Geoscientific Investigations - Preferred Crystallographic Orientation of Microcracks in Quartz: A Combined ECP/U-Stage Study. p. 231-234. Zinke, J., v. Gehlen, K., Lienert, M., Berckhemer, H.: Part B: Geoscientific Investigations - Imagery of open microcracks for statistical analysis; comparison with elastic anisotropy. p. 235-237. Zinke, J., Berckhemer, H., Abdrachimov, M. Z., Traskin, V. J.: Part B: Geoscientific Investigations - Subcritical microcrack growth in KTB drill cores as a result of weakening by water adsorption. p. 239-242. Baumann, H.: Part B: Geoscientific Investigations - Differential strain analysis and in situ stress from the German KTB-Location. p. 243-245. Lienert, M., Zang, A., Aulbach, E., Berckhemer, H.: Part B: Geoscientific Investigations - Stress relaxation of drill cores of the KTB main borehole. p. 247-250. Zinn, P., Hinze, E., Reimers, W.: Part B: Geoscientific Investigations - X-Ray Diffraction Analysis of Residual Stress in Rocks. p. 251-253. Kern, H., Popp, T.: Part B: Geoscientific Investigations - Physical in-situ properties of core samples with respect to the KTB-stress field and fluids. p. 255-258. Siegesmund, S., Dürrast, H., Vollbrecht, A., Chlupac, T.: Part B: Geoscientific Investigations - Relation between Complete VP-Anisotropy and Microfabrics: A Quantitative Approach. p. 259-263. Siegesmund, S., Vollbrecht, A., Chlupac, T., Nover, G.: Part B: Geoscientific Investigations - Fabric-controlled Anisotropy of Petrophysical Properties Observed in KTB Core Samples. p. 265-268. Nover, G., Heikamp, S., Will, G.: Part B: Geoscientific Investigations - Pressure dependence of the complex electrical resistivity and permeability in the pressure range up to 250 MPa. p. 269-273. Duba, A., Heikamp, S., Nover, G., Will, G.: Part B: Geoscientific Investigations - Electrical conduction in the KTB rocks: an unusual pressure effect. 275-278. Huenges, E.: Part B: Geoscientific Investigations - Profiles of permeability and formation-pressure down to 7,2 km. p. 279-285. Morrow, C. A., Lockner, D. L., Röckel, Th.: Part B: Geoscientific Investigations - Permeability of Amphibolite Core Samples from the KTB Drillhole. p. 287-288. Pusch, G., Weber, J. R.: Part B: Geoscientific Investigations - Influence of Deviatoric Stress Conditions on Micro Fracture Permeability of Crystalline Rock (DFG-Project PU 59/5). p. 289-292. Freund, D.: Part B: Geoscientific Investigations - Comparison of pressure-induced changes of permeability and electrical conductivity from KTB drill core samples. p. 293-296. Leuchtmann, D., Pusch, G.: Part B: Geoscientific Investigations - Investigations of Transport Processes of Gas Saturated and Undersaturated Fluids through a Fracture/Matrix-Continuum or a Discontinuous Fracture/Matrix-System respectively (Project Pu 59/7-2). p. 297-300. Börner, F., Schön, J., Jung, F.: Part B: Geoscientific Investigations - Low frequency complex conductivity of microcracked rocks. p. 301-304. Seipold, U.: Part B: Geoscientific Investigations - Determination of the thermal transport properties of amphibolites at high pressure and high temperature. p. 305-308. Endom, J., Kümpel, H.-J.: Part B: Geoscientific Investigations - Analysis of tidal and airpressure signals in the water level record of the KTB Vorbohrung. p. 309-311. Millich, E, Neugebauer, H. J.: Part B: Geoscientific Investigations - Pumping of fluids in porous media induced by earth tides. p. 313-316. Maus, St., Pohl, J., Soffel, H. C., Saradeth, St.: Part B: Geoscientific Investigations - Interpretation of an aerogeophysical survey (gamma ray spectrometry, electromagnetics and magnetics) in the KTB area. p. 317-318. Bosum, W., Casten, U., Fieberg, F., Götze, H.-J., Gobashy, M., Heyde, I., Neubauer, F. M., Röttger, B., Soffel, H. C.: Part B: Geoscientific Investigations - Gravity and magnetic structural models of the KTB-area. p. 319-322. Bosum, W., Röttger, B., Schmidt, H.: Part B: Geoscientific Investigations - Detailed Interpretation of Magnetic Anomalies in the KTB-Area in Connection with Boreholemagnetic Anomalies. p. 323-326. Friedrich, D., Soffel, H. C., Weber, K.: Part B: Geoscientific Investigations - Correlation of Petromagnetic Properties in Amphibolites with Rock Fabric from the Drill Location Vicinity of the German Continental Deep Drilling Program. p. 327-330. Worm, H.-U.: Part B: Geoscientific Investigations - Rock Magnetism and Modelling of Magnetic Borehole Anomalies. p. 331-333. Schumann, R., Pohl, J., Soffel, H .C.: Part B: Geoscientific Investigations - A preliminary rock magnetic log of cuttings from the KTB Hauptbohrung (0 - 7200 m). p. 335-336. Fieberg, F., Worm, H.-U., Kuhnke, F., Bosum, W.: Part B: Geoscientific Investigations - Magnetic Anomalies in the KTB Pilot and Main Drillholes. p. 337-342. de Wall, H., Kontny, A., Rauen, A., Keyssner, S., Schumann, R., Worm, H.-U.: Part B: Geoscientific Investigations - Thermomagnetic investigations on ore-bearing samples from KTB Vorbohrung and Hauptbohrung. p. 343-347. Markert, H., Lehmann, A. : Part B: Geoscientific Investigations - 3D-Magnetopetrography in Zones of Magnetic Anomaly: ARM-Susceptibility - Rayleigh-Hysteresis - Modelling Magnetic Induction. p. 349-352. Markert, H., Lehmann, A. : Part B: Geoscientific Investigations - Viscous Magnetization of Pyrrhotite-bearing Rock - Time Law, Weak Field Approximation. p. 353-356. Gobashy, M. M., Casten, U., Neubauer, F. M.: Part B: Geoscientific Investigations - Borehole gravimetry in the KTB-main well and a new structural interpretation. p. 357-360. Stoll, J.: Part B: Geoscientific Investigations - Mise-a-la-Masse with the KTB. p. 361-364. Bigalke, J., Grabner, E. W., Stoll, J., Haak, V.: Part B: Geoscientific Investigations - Electrochemical modelling of self-potential anomalies. p. 365-368. Bigalke, J., Stoll, J.: Part B: Geoscientific Investigations - Cyclic Voltametric Measurements within the KTB Borehole. p. 369-372. Pape,H., Grinat,M., Vogelsang,D. : Part B: Geoscientific Investigations - Petrophysical Parameters related to Decay Curves of Induced Polarization. p. 373-376. Hurtig, E., Schrötter, J.: Part B: Geoscientific Investigations - Fibre Optic Temperature Measurements in Deep Boreholes. p. 377-380. Pechnig, R., Wohlenberg, J.: Part B: Geoscientific Investigations - EFA-LOG - Reconstruction of Lithology by Log Interpretation - Hole to hole correlation in KTB. p. 381-384. von Drach, V., Köhler, H.: Part B: Geoscientific Investigations - Geochronological Profile of the KTB Pilot Bore Hole. p. 385-388. Hofmann, B., von Drach, V., Köhler, H.: Part B: Geoscientific Investigations - Nd Model Ages and Sr Isotope Systematics of Drilled Material from the KTB Main Bore Hole. p. 389-390. Hölzl, S., Hofmann, B., Köhler, H.: Part B: Geoscientific Investigations - U-Pb and Sm-Nd dating on a metabasite from the KTB main bore hole. p. 391-392. von Quadt, A.: Part B: Geoscientific Investigations - Meta-gabbros from the KTB pilote bore hole: a multi-element approach. p. 393-394. Söllner, F., Miller, H.: Part B: Geoscientific Investigations - U-Pb model ages for di-episodic lead loss in zircons from gneisses of the KTB pilot drill hole. p. 395-398. von Drach, V., Veress, Ch., Hofmann, B., Köhler, H., Vejnar, Z., Waldhauserrova: Part B: Geoscientific Investigations - The Isotopic Evolution of the Upper Mantle in the NW Part of the Bohemian Massiv. p. 399-402. Hecht, L., Spiegel, W., Morteani, G.: Part B: Geoscientific Investigations - Genetic studies of the granites of the Fichtelgebirge - A contribution to crustal evolution at the border of the Saxothuringian and Moldanubian zones. p. 403-405. Wendt, I.: Part B: Geoscientific Investigations - Geochemistry, radiometric ages and genetic relations of granites adjacent to KTB. p. 407-410. Siebel, W.: Part B: Geoscientific Investigations - Geochronology of the Leuchtenberg Granite and the associated Redwitzites. p. 411-415. Weinlich, F. H., Bräuer, K., Kämpf, H., Strauch, G., Weise, S.: Part B: Geoscientific Investigations - Gasgeochemical investigations on mineral springs along a cross-section through the Eger rift. p. 417-421. Figgemeier, Chr.: Part B: Geoscientific Investigations - Detection, Characterisation and Calculation of Fluids by continuous Drill Mud Analysis. p. 423-426. Zimmer, M., Erzinger, J.: Part B: Geoscientific Investigations - Quantification of gases dissolved in drilling mud - Results from the KTB. p. 427-429. Müller, P., Dulski, P., Giese, U.: Part B: Geoscientific Investigations - Rare earth elements in KTB-VB fluids. p. 443-446. Faber, E., Sohns, E., Weise, S.: Part B: Geoscientific Investigations - Origin of hydrocarbon gases in the KTB boreholes. p. 431-433. Weise, St., Lodemann, M., Figgemeier, Chr., Hansmann, J., Machon, L., Kamm, H.,Faber, E.: Part B: Geoscientific Investigations - Helium isotopes and composition of pumping test gases from the KTB pilot hole. p. 435-438. Fehn, U., Moran, J.E.: Part B: Geoscientific Investigations - Determination of Cl36 and I129 in fluids from the KTB project. p. 439-442. Simon, K., Hoefs,J.: Part B: Geoscientific Investigations - O,H isotopes of rocks and minerals: crustal profile and fluid evolution. p. 447-450. Behr, H.-J., Horn, E. E., van den Kerkhof, A. M., Reutel, Chr., Topp, J.: Part B: Geoscientific Investigations - Crustal fluids of the continental deep drilling project (KTB) at 0 - 7000 m. p. 451-454. Walther, J., Althaus, E.: Part B: Geoscientific Investigations - Reconstruction of geothermal gradients from fluid inclusions in rocks from the KTB borehole. p. 455-459. Pasteris, J. D.: Part B: Geoscientific Investigations - Preliminary Comparison of Fluid Inclusions from the KTB Pilot Hole, Germany, with those from the Southwestern Footwall of the Duluth Complex, Minnesota, USA. p. 461-464. Bach, W., Erzinger, J.: Part B: Geoscientific Investigations - Geochemistry of volatile components in rocks from the KTB-HB. p. 465-468. Schäfer, K., Kirsten, T.: Part B: Geoscientific Investigations - Noble Gases in rocks from the KTB and the Kola SG3. p. 469-472. Thomas, R.: Part B: Geoscientific Investigations - Estimation of Water Content of Granite Melts from Inclusion Data. p. 473-480 Borchardt, R., Emmermann, R.: Part B: Geoscientific Investigations - Vein minerals in KTB rocks. p. 481-487. Schwarz, U., Schöps, D., Herzig, P. M., Friedrich, G.: Part B: Geoscientific Investigations - Tourmaline in metabasites of the KTB-Hauptbohrung. p. 489-491. Walther, J., Althaus, E.: Part B: Geoscientific Investigations - Graphite deposition in tectonically mobilized fault planes of the KTB-Pilot Drill Hole. p. 493-497. Bartels, K. S., Pasteris, J. D.: Part B: Geoscientific Investigations - Preliminary results on the relation between graphite derived from metamorphosed organic matter and fluid deposition in rocks of the KTB-VB und -HB: A Raman spectroscopic study. p. 499-502. Meier, H., Zimmerhackl, E., Zeitler, G., Hecker, W., Albrecht, W., Büsche, D.: Part B: Geoscientific Investigations - Distribution of Uranium- and Thoriumisotopes in Rocks and Fluids from the KTB-Hauptbohrung. p. 503-506. Giese, U., Müller, P.: Part B: Geoscientific Investigations - Mobility of metal ions in gneisses of KTB. p. 507-510. Kontny, A., Keyssner, S., Friedrich, G.: Part B: Geoscientific Investigations - Ore petrology in the KTB Hauptbohrung (6000 - 7220 m). p. 511-513. Grawinkel, A., Kontny, A., Schöps, D., Herzig, P. M., Friedrich, G.: Part B: Geoscientific Investigations - Oxide minerals and their metamorphogenic alteration products in metabasites of the KTB-Hauptbohrung. p. 515-517. Berner, Z., Puchelt, H.: Part B: Geoscientific Investigations - Sulfur Isotope Geochemistry and Relations to the Minor Element Pattern of Pyrite: A Case-Study. p. 519-522. Brauns, M., Haak, U.: Part B: Geoscientific Investigations - U/Pb-Investigations on Pyrite, Galena and Feldspar. p. 523-524. Moh, G. H., Tippelt, G., Amthauer, G., Lungelhofer, F., Dachs, E., Finger, F.: Part B: Geoscientific Investigations - The influence of varying Fe2+/Fe3+-ratios in coexisting garnets and biotites on the garnet-biotite-geothermometer. p. 525-527. Garbe, S., Gaul, G., Knöchel, A., Lechtenberg, F., Janssens, K., Vincze, L., Rindby, A., Schlaubitz, M., Ullrich, H.-J., Emmermann, R., Lauterjung, J., Klemm, W., Walther, J.: Part B: Geoscientific Investigations - X-ray Fluorescence Analysis Using Synchrotron Radiation - A New Powerful Microprobe for Geochemistry. p. 529-532. Conze, R.,Häner, R.,Yazici, A.: Part C: Technical aspects and future developments - The KTB Information System. p. 535-541. Rischmüller,H., Chur,C., Draxler,J.K., Engeser,B., Hoffers,B., Sperber,A., Tran Viet,T., Wohlgemuth,L. : Part C: Technical aspects and future developments - Advanced Drilling Technology for the Continental Deep Drilling Program of the Federal Republic of Germany (KTB). p. 543-557. Engeser,B., Tran Viet,T. : Part C: Technical aspects and future developments - Improvements of the KTB-Drilling Fluid, on the basis of the previous experiences. p. 559-564. Tran Viet,T., Figgemeier,Chr. : Part C: Technical aspects and future developments - Experience with the KTB-Drilling Fluid since the Conversion to the Pyrodrill System. p. 565-568. Wolff,H., Fang,G. : Part C: Technical aspects and future developments - Experiments on cuttings correlation to the drilled formation. p. 569-571. Gloth,H., Wu,J. : Part C: Technical aspects and future developments - Investigations on Measuring Important Rock Mechanical Parameters on Cuttings. p. 573-576. Lauterjung,J., Huenges,E., Emmermann,R. : Part C: Technical aspects and future developments - KTB Deep Crustal Lab. p. 577-580. Stiller,M., Wiechmann,M. : Part C: Technical aspects and future developments - ISO'89-3D - a short summary of the final data processing. p. 581-584.

Description: Dürbaum, H.-J.: Introduction to ISO 89. p. 3-5. Rehling, J. G., Stiller, M.: 3-D reflection seismic survey of the area around the KTB Drill Site. p. 9-53. Albrecht, J., Teichert, D.: Experiment "Durchschallung" - Calculation of static corrections from seismic borehole records using the vibrator signals of the 3-D seismic reflection survey within ISO89. p. 57-64. Wiederhold, H.: 3-D ESP - Experiment of the Integrated Seismics Oberpfalz 1989. p. 67-82. Lüschen, E., Söllner, W., Hohenrath, A., Rabbel, W.: Integrated P- and S-Wave borehole experiments at the KTB-deep drilling site. p. 85-134. Harjes, H. P., Janik, M., Kemper, M.: Moving source profiling - A link between KTB-borehole data and seismic surface measurements. p. 137-155. Mylius, J., Nolte, E., Scharf, U.: Use of the Seismic receiver chain SEKAN 5 within the framework of Integrated Seismics in the Oberpfalz. p. 159-179. Gebrande, H., Bopp, M., Meichelböck, M., Neurieder, P.: 3-D Wide-Angle Investigations in the KTB Surroundings as part of the Integrated Seismics Oberpfalz 1989 (ISO89). p. 183-208.

Description: A depth migration is very sensitive to tl1e velocity model especially in the case of steeply dipping reflectors like the so-called SE reflectors at the KTB site. Velocity models derived from first breaks in vertical seismic profiling (YSP) experiments were used and compared with velocity data at the top of the crystalline refractor derived by short range measurements. Because of high picking errors, the possibility to compare seismic events with information of the upper part of the KTB HB hole allows only a very limited calibration of the velocity model. Based on the cutting profile, we assume that the reflectors SE-2 and SE--3 represent faults at 3600-3660 m depth and 5440-5560 m depth ( or a lithological contrast at 5540-5610 m depth). We suppose that the velocity of an average model starts at about 5.2 km/s at the surface, reaches a value of 6.0 km/s in about 2.5 km depth and remains approximately constant below. In that case, the reflector SE-1 will be hit at a depth of 7 .0 km. Because of the steep dip of reflector SE-1 which increases the size of the error range (from inaccurate velocity models and picking errors). the tolerance of about ±0.4 km is very high.

Description: The 3-D expanding spread experiment, performed within ISO 89 at the KTB site, has been evaluated under two aspects. The first aspect was the estimation of velocity-depth functions. Due to the limited reflection strength, estimating NMO velocities as a function of twoway traveltime was possible in east-west direction only. Thus the calculation of interval velocities, requiring the correction of 3D effects, was not possible. The second aspect was the directional dependency of the P-wave velocity at the top of the crystalline by evaluating the direct waves. After eliminating the effects of the lithology, a least-mean-squares anisotropy-velocity ellipse was fitted to the data with WSW as the direction of the maximum velocity and a velocity contrast of about 6%.

Description: In der folgenden Darstellung wird davon ausgegangen, daß bei der reflexionsseismischen Erkundung von Krustenstrukturen altere orogentektonische Strukturen wahrscheinlich nur bei günstiger Geometrie und Tiefenlage erfaßt werden konnen. Eine grobe lithologische Differenzierung mit ausreichenden Elastizitatsunterschieden ist im fraglichen Raum auf einen bestimmten Krustentyp, das Bohemikum, beschrankt. Dessen größte Mobilitat ist wahrscheinlich mit der spätkaledonischen Tektogenese nach Ablauf des Silurs verbunden. Das Bohemikum beinhaltet machtige und lateral aushaltende Metabasite und liegt in groBeren Abschnitten relativ flach. Dies gilt vor allem for subduzierte Bereiche des Bobemikurns. In dieser Aussage kommt eine Modellvorstellung zum Ausdruck (STETTNER 1990, 1992), welche eine Deutung und Korrelation der seismischen Strukturen ermöglicht. So konnen im oberpfälzer Grundgebirge die in etwa 7 bis 12 km Tiefe liegenden seismischen Reflexionen mit dem höheren Abschnitt des subduzierten Bohemikums korreliert werden. Im Fichtelgebirge entspricht dem der Bereich zwischen 9 und 15 km Tiefe. Von den spätkaledonisch in höhere Krustenbereiche aufgeschobenen Bohemikumkomplexen sind nur jene durch seismische Reflexionen registriert, welche relativ flach liegen (der Schwerestörkörper des Frankenwaldes). Variskische Relativbewegungen zeichnen sich nur in raumlich begrenzten Bereichen ab. Junge, wahrscheinlich tertiäre Störungen, werden seismisch - auch bei mittelsteilem Einfallen - auffallend deutlich abgebildet. Die mit diesen Störungen verbundenen Gefügelockerungen (Porositaten) und dadurch bedingte Geschwindigkeitserniedrigungen werden anscheinend seismisch besser registriert als die Geschwindigkeitsunerschiede einer mächtigen GneisMetabasit- Wechsellagerung.

Description: A preliminary interpretation of the major 3-D reflectors is given by correlation with the surface geology and the drilled sections of the KTB Vorbohrung and the Hauptbohrung. Possible explanations for the reflections are discussed: lithological boundaries, cataclastic fault zones (partly filled with fluids) and other structural properties (e.g. foliation). Flat reflectors near the surface (MFl - 4) can be correlated with Permocarboniferous and Mesozoic sediments of the South German Platform. Special attention is drawn to a group of steeply NE-dipping reflectors (SEl, SE2, SE3) which are, obviously, produced by en-echelon fault structures of the Franconian Lineament. In the boreholes, SE2 can be identified as a bundle of faults near 3600 m. The calculated depth of the most prominent reflector SEl in the Hauptbohrung is between 6600 and 7100 m. It represents, probably, a deepreaching reverse fault zone which produces an offset of the reflections of the midcrustal "Erbendorf body" (B1 - B2/G4 - Gl).

Description: The determination of 3D-static corrections usually is possible only with the exact knowledge of thickness and velocity of the superficial layers. In order to determine these parameters extensive additional measurements are necessary, e.g. refraction seismics. These measurements can be reduced considerably if there is already a borehole in the survey area; the shots generated for the seismic survey can be recorded with a borehole geophone chain. The direct traveltimes determined from these records are lying on a 2nd-order plane (ideally a hyperboloid). If these traveltimes are influenced by e.g. differences in the elevations of the source location or velocity inhomogeneities, the first arrival traveltimes scatter around such a hyperboloid. The static corrections can be determined from the difference between the measured traveltime and the ideal hyperboloid. Further measurements are not required, because a precise knowledge of the parameters of the weathered layer is not necessary. In the following a method is presented (developed by Albrecht (1991) and Teichert (1991)) to determine the theoretical hyperboloid. Another method, described at the end of this report, is the determination of average velocities from picked and corrected first arrival traveltimes.

Description: A kinematic evaluation of first breaks of the direct P-wave in several VSPs, carried out at the KTB pilot hole in 1988 and 1989, is presented. After picking and correction to vertical traveltime, average and interval velocities were computed. The average velocity increases with depth caused by the successive closing of microcracks under increasing confining pressure. Tl1is average velocity-depth curve is the most accurate velocity information at the KTB site and can be used in migration and time-depth conversion problems in 2D- and 3D reflection surveys.

Description: The recordings of the wide-angle shots by 3-component geophones in the KTB pilot hole exhibit the effect of shear-wave splitting, that is the most diagnostic evidence of seismic anisotropy (Crampin, 1989). The possible reasons for seismic anisotropy will be discussed and the lateral extension of the anisotropic region will be estimated.

Description: Based on the DEKORP ISO 89 borehole experiments, the question of the existence of "seismic anisotropy at the KTB deep drilling site" has to be answered unambiguously with "yes". The anisotropy could be quantified in situ for a gneiss packet where it is apparently influenced by both rock foliation and cracks. The values obtained in the direct vicinity of the KTB pilot hole, however, cannot be extrapo l ated into its surroundings without modification: While the general trend of anisotropy with high velocity values towards SE-ESE is conserved, the amount of anisotropy shows smaller average values. This seems to reflect the inhomogeneous distribution of metamorphic rocks and granite in the target area. The direction of high seismic velocities (ESE) coincides approximately with the postulated direction of maximum horizontal tectonic stress in the Oberpfalz region.

Description: The detection of permeable fractures is one of the research objectives of the KTB-project. Among seismic methods the tube wave survey is suggested for this purpose. Open permeable fractures intersecting the borehole may generate secondary tube waves which show up as V-shaped traveltime patterns (Chevron pattern) in sonograms. We investigated tube waves transmitted and recorded by the VAL-(Variable Acoustic Logging)-tool technique. The depths of tube wave generation were determined. 85 percent of them correlate with planar structures seen in acoustic borehole televiewer (BHTV) logs. BHTV data reveal many structures. One third of these coincide with tube wave events in the VAL data. To verify the hypothesis that the occurence of a structure in both, traveltime and amplitude displays of BHTV data indicates an open fracture, we compared this dataset with stronger tube wave events assuming that the latter can be correlated to open fractures. We found no evidence for the correctness of the hypothesis. We compared tube wave events with caliper logs, temperature and mud conductivity anomalies during hydraulic tests, temperature anomalies during heat exchange test, core sample observations and gas-geochemical anomalies The comparison between these various borehole data is not as satisfactory as to ensure the reliability of tube wave analysis to determine open fractures. Earlier investigations suggest that amplitudes of tube wave events are related to hydraulic permeabilities. Deficiencies of the present tube wave dataset (VAL) and missing fluid logging for calibration purposes prevents us from quantitative analysis.

Description: Dürbaum, H.-J.: Introduction. p. 1-2. Stiller, M.: Preliminary generation of a stacked data volume of the entire ISO'89-3D data set using an envelope technique. p. 3-29. Hluchy, P., Körbe, M., Thomas, R.: Preliminary Interpretation of the 3D-Seismic Survey at the KTB Location. p. 31-52. Stiller, M., Tormann, M.: Application of a simplified horizon migration process to the data of the 3D-seismics ISO'89. p. 53-65. Wiederhold, H.: Interpretation of envelope-stacked 3D seismic data and its migration - another approach. p. 67-113; Hannover. Körbe, M., Reichert, C.: On the character of "Steep Event SE-1" reflected energy, reflected refraction, diffraction or any artifact?. p. 115-131. Janik, M., Harjes, H. P.: Structural Interpretation of the MSP-Experiment. p. 133-148. DEKORP Research Group: Depth determination of prominent seismic structures beneath the KTB main drillhole KTB-HB. p. 149-160. Simon, M.: Structural images from 3D-isochron migration of wide-angle data in the surroundings of KTB. p. 161-168. Söllner, W., Lüschen, E., Li, X.-P., Hubral, P., Gut, T. W., Widmaier, M.: VSP - A Link between Reflection Seismic Profiling and Lithology. p. 169-199. Rühl, T., Hanitzsch, C.: Average and interval velocities derived from first breaks of vertical seismic profiles at the KTB pilot hole. p. 201-219. Bönnemann, C., Buttkus, B: Results of the 3-D expanding spread experiment. p. 221-232. Martini, N., Stiller, M.: Results of the ISO'89 experiment "Durchschallung": Recording of the vibrator sweeps of the 3D-seismics in the KTB borehole. p. 233-246. Lüschen, E., Werner, U.: Fluid/Gas indications in 8 km depth beneath the KTB and rock anisotropy from shear-wave reflection surveys. p. 247-274. Rabbel, W.: Seismic anisotropy at the KTB Deep Drilling Site. p. 275-289. Gut, T. W., Söllner, W., Lüschen, E., Edelmann, H. A. K.: More reliable shear-wave data from VSP by using CIPHER-technique. p. 291-295. Bopp, M: Shear-wave splitting observed by wide-angle measurement. p. 297-308. Hanitzsch, C., Rühl, T., Heinemann, B. B.: Detection of permeable fracture zones by tube waves in the KTB pilot hole. p. 309-332. Hanitzsch, C., Hubral, P., Rühl, T., Söllner, W.: Migration of steeply dipping reflectors at the KTB site: Depth errors caused by inaccurate velocity models. p. 333-341. Stettner, G.: Zur Korrelation des tektonischen Baues mit den seismischen Strukturen im Raum KTB-Oberpfalz - Münchberger Gneismasse. p. 343-349. Hirschmann, G.: On the Geological Interpretation of the 3-D Seismic Data with Special Regard to the Information from the KTB Boreholes. p. 351-373.