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  • Other Sources  (31)
  • Bornträger  (15)
  • Center for Akad. Publ. Japan  (12)
  • Geozon Science Media  (4)
  • IFM-GEOMAR
  • 1975-1979  (31)
  • 1978  (31)
  • 1
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    Die jungpleistozänen Löß-Deckschichten der Braunkohlentagebaue der Braunschweigischen Kohlenbergwerke (BKB) zwischen Helmstedt und Schöningen (1978)
    Geozon Science Media
    Details
    Publication Date: 2022-08-05
    Description: Einige mehrgliedrige Lößprofile im Raum der Tagebaue Treue, Helmstedt und Alversdorf der Braunschweigischen Kohlenbergwerke bei Helmstedt werden beschrieben, interpretiert und datiert. In den vollständigen Jungwürm-Profilen lassen sich bis zu vier Naßböden ausgliedern. Eine Parallelisierung mit der Jungwürm-Gliederung von Rohdenburg & Meyer (1966) ist möglich. Erstmals werden aus dem Gebiet am N-Rand der Lößgrenze 1 —1,2 m mächtige Mittelwürmlösse nachgewiesen, die an zwei Lokalitäten (im Tagebau Alversdorf) vom Lohner Boden abgeschlossen werden. Der Altwürmabschnitt weist in den vollständigen Profilen außerhalb von Dellen bis zu 3 Humuszonen bzw. -reste auf, zwischen die Bleichzonen eingeschaltet sind. Der letztwarmzeitliche Boden ist sowohl auf Löß (als Pseudogley oder im oberen Teil pseudovergleyter Bt-Horizont) als auch auf glazifluviatilen und moränalen Ablagerungen entwickelt. Aus den Diskordanzen innerhalb der Profile werden bis zu vier Dellenbildungsphasen und einige weitere Abtragungsphasen abgeleitet.
    Description: research
    Keywords: ddc:551.7
    Language: German
    Type: doc-type:article , publishedVersion
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    CITATION GEO-LEO
  • 2
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    Das Ca/Mg—Verhältnis in den Marschböden, eine Folge postsedimentärer Faktoren (1978)
    Geozon Science Media
    Details
    Publication Date: 2022-08-04
    Description: Das Ca/Mg-Verhältnis wurde auf typischen Kartenausschnitten einer großflächigen geologisch-bodenkundlichen Kartierung auf dem nordfriesischen Festland mit anderen Merkmalen dargestellt und verglichen. Es zeigt keine Beziehungen zu den Sedimentationsbedingungen und damit keine deutbaren Zusammenhänge mit den Kartiereinheiten und den meisten Geländemerkmalen. Dagegen kommt eine deutliche Abhängigkeit von postsedimentären Faktoren heraus, die sich überall anders überlagern und das Ca/Mg-Verhältnis bestimmen. Es ist deshalb als Grundlage für eine Kartierung und Klassifizierung der Marschböden nicht geeignet.
    Description: research
    Keywords: ddc:551.7
    Language: German
    Type: doc-type:article , publishedVersion
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    CITATION GEO-LEO
  • 3
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    Pollenanalytische Untersuchungen zur Entstehungs- und Entwicklungsgeschichte des Bruchbergmoores/Oberharz (1978)
    Geozon Science Media
    Details
    Publication Date: 2022-08-02
    Description: Auf drei kleinen benachbarten Moorflächen des Bruchberg-Moores wurden ein durchlaufendes Pollenprofil hergestellt und weitere Untersuchungen nächst der Torfbasis durchgeführt. Anhand der Untergrundmorphologie und der Basisproben konnte die flächenhafte Moorausbreitung rekonstruiert werden. Die ältesten Vermoorungen setzen demnach im Präboreal ein. Unterbrechungen im Moorwachstum wurden am Ende der Waldzeiten VI (älteres Atlantikum) und in VIII b (Subboreal) gefunden.
    Description: research
    Keywords: ddc:551.7
    Language: German
    Type: doc-type:article , publishedVersion
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    CITATION GEO-LEO
  • 4
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    Genetisch—chronologische Studien im nördlichen Bereich des Inn—Chiemseegletschers (1978)
    Geozon Science Media
    Details
    Publication Date: 2022-08-02
    Description: Aus einer detaillierten geomorphologischen Probekartierung (nach GMK 25) im Jungmoränengebiet nördlich des Chiemsees werden die genetisch-chronologischen Probleme der Vorlandfächer des Inn- und Achen (= Chiemsee-) Gletschers in ihrem nördlichen Kontakt-und Wirkungsbereich vorgestellt. Die Darstellung eines phasenhaften Nieder- und Rückschmelzens der würmzeitlichen Vorlandeismassen bestätigt oder differenziert teilweise die bisherigen Untersuchungen, teilweise werden sie aufgrund der Geländebefunde abgelehnt. Am Schluß sind die wesentlichen Ergebnisse thesenartig zusammengefaßt.
    Description: research
    Keywords: ddc:551.7
    Language: German
    Type: doc-type:article , publishedVersion
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    CITATION GEO-LEO
  • 5
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    Thorium and uranium isotope analyses on "Meteor" core 12310, NW African Continental Rise (1978)
    Bornträger
    Details
    Publication Date: 2022-07-25
    Description: The Th content of the sediment samples from "Meteor" core 12310 (3080 m water depth, off NW Africa) on a carbonate-free basis lies around the average of 12.4 ppm and is similar to the average content of the earth crust. On the contrary, uranium was found to be up to 3.5-fold enriched in the core section between 60 and 330 cm (within the Würm Glacial) where reducing conditions occur, due to deposition of authigenic uranium (9 µg/cm2 1000 yrs.). The authigenic uranium content is correlated to the organic matter content (U/Corg ratio = 6 · 10-4). On the basis of the uranium content of the oxidized section uranium was split into a detritic and an authigenic component and the amount of supported ionium was calculated. From the profile of the specific I0.excess act1v1ty Io-total - Io-supported) with depth, average sedimentation rates of 3.3 ± 0.6 cm/1000 yrs. for the warmer stages and of 5 ± 1 cm/1000 yrs. for the cooler periods were estimated.
    Type: Article , PeerReviewed
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    PAPER (OCEANREP)
  • 6
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    Th230-excess EDTA extraction : a modification of the ionium method for high accumulation rate determination (1978)
    Bornträger
    Details
    Publication Date: 2022-07-25
    Description: A rapid procedure for Io (Th230) dating of sediments with accumulation rates in the range of several cm/1000 years is described. Studying of large sample populations with very small Io-excess activity is possible as the counting time (around 1500 min/sample) are 2 to 5 times shorter than with the standard Io-excess method. Improved sensitivity of the Io-excess measurement is achieved by: 1) extraction (~90%) of the authigenic Io-excess with EDTA, with minor leaching (~30%) of the allogenic Th232 and Io-supported, 2) processing samples as large as 10 g or more. The procedure was applied to sediments from the Caribbean (V 12-122) and from the Ionian Sea (22M48 and 17M17). In the case of the standard core V 12-122 our results are in good agreement with previous time-consuming Io determinations. The resulting average accumulation rates of 2.0 ± 0.3 cm/1000 years for the Ionian Sea cores are close to the average derived from magnetic reversal studies of a nearby core.
    Type: Article , PeerReviewed
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  • 7
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    Zusammensetzung, Stratigraphie und Bildungsbedingungen der Sedimente am Kontinentalhang vor Sierra Leone (Westafrika) (1978)
    Bornträger
    Details
    Publication Date: 2022-07-25
    Type: Article , PeerReviewed
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  • 8
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    A preliminary note on recent ostracodes from shelf to rise sediments off Northwest Africa (1978)
    Bornträger
    Details
    Publication Date: 2022-07-25
    Description: A preliminary study was carried out on the ostracode fauna obtained from marine sediments off the Sahara Desert. The ostracodes are divided into two distinct associations: Association A - shallow water (100-483 m); Association B - deep water (470-2859 m). The deep water association differs from that of the shallow water by its low diversity and by the predominance of somewhat larger "blind" ostracodes in it. The depth of the boundary between the two associations corresponds closely to the general universally recognized 500 m boundary, below which psychrospheric conditions prevail and dictate the appearance of typical deepwater ostracode fauna.
    Type: Article , PeerReviewed
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  • 9
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    The air-earth current density at the water surface and in the free atmosphere above the ocean : consequences for the global atmospheric-electric circuit ; results from the Atlantic-Expedition of the Research Vessel "Meteor" 1973 (1978)
    Bornträger
    Details
    Publication Date: 2022-07-08
    Description: One main point of our atmospheric-electric measurements over the Atlantic Ocean 1973 was the investigation of the air-earth current density above the sea. In addition to direct measurements at the water surface with a floating net, we calculated the air-earth current density from the electric field and the air conductivity measured simultaneously on board of the ship and during particular ascents in the free atmosphere. During all five ascents the air-earth current density did not change with altitude. For pure maritime air-conditions, the mean air-earth current density was found to be 2.9 pA/m2. The mean hourly air-earth current density over the Atlantic shows nearly the same 24-hour pattern as measured by COBB (1977) at the South Pole at the same time. When dust-loaden air masses of African origin reached the ship as well as under continental influence the mean air-earth current density was reduced to 2.1pA/m2. The global 24-hour pattern was modified by this continental influences. Finally, it is shown that the values of the air conductivity measured on board R. V. "Meteor" during our earlier expeditions have been influenced by the exhaust of the ship and must therefore be corrected. With this correction, our new mean values of the air-earth current density over the Atlantic are 2.6 pA/m2 in 1965 and 2.0 pA/m2 in 1969. From all measurements, the global air-earth current is estimated to be about 1250 A.
    Type: Article , PeerReviewed
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  • 10
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    Profile derived turbulent fluxes in the surface layer under disturbed and undisturbed conditions during GATE (1978)
    Bornträger
    Details
    Publication Date: 2022-07-08
    Description: The fluxes of momentum, heat, and water vapour have been obtained by the aerodynamic profile method. Within the frame work of GATE variation of fluxes with disturbed conditions are of special interest. The time traces of surface layer parameters repeatedly showed definite instationarities marked by a sudden drop of temperature by a few degrees centigrade. For these pronounced instationarities, equilibrium state of the profiles was regained after a few minutes, in agreement with scale considerations. For fluxes properly nondimensionalized in terms of surface layer parameters, no systematic deviations have been found under disturbed conditions compared with undisturbed conditions. Due to systematic variations of parameters, the energy exchange between sea and atmosphere was enhanced by about 30 % under disturbed conditions. From the above evidence it is concluded that for larger scale investigations reliable determination of fluxes from surface layer mean variables is possible.
    Type: Article , PeerReviewed
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