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  • 1
    Monograph available for loan
    Monograph available for loan
    L'astronomie et le sentiment religieux (1964)
    Paris : Paillard
    Details Availability
    Call number: O 3336
    Type of Medium: Monograph available for loan
    Pages: 199 S.
    Language: French
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    PRECISION DANS LES ETUDES MAGNETIQUES AERIENNES SON INCIDENCE SUR LA QUALITE DES RESULTATS (1963)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 11 (1963), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The accuracy of an airborne magnetic survey is limited by the following factors:〈list xml:id="l1" style="custom"〉1Slow (diurnal) variations of the earth's field.2Fast variations of the earth's field (earth field “noise”).3Drift in measuring equipment.4Magnetometer “noise” (electronics, orientors …).5External disturbances, miscompensation.6Irregularities in flight altitude.7Location errors.The relative importance of these different causes of errors is analyzed from two viewpoints:〈list xml:id="l2" style="custom"〉a)Direct interpretation of anomalies on actual records,b)Compilation of isogram maps and their quantitative interpretation (second derivative, reduction to the pole, …).In conclusion, these errors do not affect the direct interpretation of profiles of standard quality. For instance, if the average altitude of the plane above the magnetic bodies is 1000 m, a variation of its flight level of about 100 m does not introduce serious errors in the interpretation.On the other hand, compilation of contoured isogam maps is often difficult, and compensation of the previous errors is not always possible except by approximate, rule-of-thumb methods. Furthermore, when the interval between lines is greater than the depth of magnetic masses below the plane of flight, the contours are interpolated and do not represent the magnetic field. Sometimes the contouring can offer different solutions, and the map is therefore not objective; this could then result in errors larger than those from the other causes.To evaluate the quality of the map and its interpretation we must know the location of flight lines and the compilation process employed. It is also wise to avoid quantitative interpretation of small anomalies and limit oneself to a qualitative interpretation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1963.tb02022.x
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  • 3
    Electronic Resource
    Electronic Resource
    EFFET DE LA VITESSE ET DE LA CONSTANTE D'INTÉGRATION SUR LA FORME DES ANOMALIES AÉRORADIOMÉTRIQUES (1962)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 10 (1962), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The theoretical radiometric anomalies caused either by a pinpoint source or by a larger one, which could be detected 75 metres above the source by a mobile detector with a very low velocity and time constant, were treated by an analog simulator which gave the curves transformed by the effect of velocity and time constant. The characteristics of these curves are discussed.An actual airborne survey above a radioactive anomaly of small surface yielded results which are analyzed and compared with the previous theoretical data. The degree of agreement between theoretical and experimental results seems satisfactory.This study shows that the deformation of curves by velocity and time constant in most actual surveys is small enough when the product of velocity and time constant is less than 75 m for a flying altitude of 75 m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1962.tb02008.x
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  • 4
    Electronic Resource
    Electronic Resource
    UN NOUVEAU MAGNETOMETRE AERIEN LE MAGNETOMETRE A VAPEUR DE CAESIUM (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 13 (1965), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Compagnie Générate de T.S.F. (C.S.F.) has recently developed a new magnetometer based on the optical pumping of caesium vapour.After carrying out a systematic programme of ground and in-flight tests, Compagnie Générale de Géophysique (C.G.G.) has put several of the airborne models into service.Following a discussion of the fundamental principles involved, the instrument is described and its specifications are given. The two forms of read-out are: an analog recording, of the conventional type, and a digital version, recorded on magnetic tape.The instrument measures the total intensity of the earth's magnetic field with a sensitivity of 0.03 gamma. Temperature compensation is provided, making possible operation between — 20 and + 45 degrees centigrade. Performance is not affected by an inhomogeneous field as long as the gradient is less than 10 gammas per centimetre.The range of the instrument is from 20,000 to 70,000 gammas and the values are obtained automatically, without the intervention of an operator.There is no danger of instrumental drift, and the selection of caesium vapour and the components of the detector guarantee that the absolute value of the field, throughout the range of the instrument and regardless of the circumstances, is measured to within one gamma.The first large-scale project making use of these magnetometers, carried out by C.G.G., is the Magnetic Map of France, which has been compiled for the Centre National de la Recherche Scientifique. The characteristics of this project are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1965.tb01931.x
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  • 5
    Electronic Resource
    Electronic Resource
    LA RADIOMÉTRIE AÉROPORTÉE, OUTIL D'EXPLORATION GÉOLOGIQUE STRUCTURALE (1961)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 9 (1961), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: This paper gives the results of an airborne radiometric survey flown in France over an area of 1,700 km2 at 150 m. above ground, with parallel north-south profiles 1 kilometre apart. Besides uranium indications discovered or recovered, this survey shows a close correlation between isorad and geological maps. The southern granitic zone is more radioactive than the northern gneissic one, with a constant step on the boundary. In the northern zone granitic intrusions have high radioactivity, and isorad contours are right on the boundaries of the main granitic units. In addition, the radiometric map shows the connections between these batholith roots and probable new satellite outcrops not shown on the geological map. Such a radiometric map is a help towards completing the geological map, and gives indications regarding probable structural connections between different granites.The detailed survey of an anomaly discovered during the previous reconnaissance survey is given as another example. It was flown twice, with an aircraft at 75 m elevation with profiles 250 m apart, and with a helicopter at 35 m elevation with profiles 50 m apart. In this area of the main Marche fault, granulites in the south and gneisses in the north have low radioactivity, and the central shearing zone also. But, on both sides of this shearing zone, two crushed areas have high radioactivity, and uranium indications. The geological survey of the northern crushed gneisses area shows small granitic intrusions linked with the radioactive anomalies. These intrusions were unknown until they were discovered with the help of this map. Some mineral indications are connected with them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1961.tb01676.x
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  • 6
    Electronic Resource
    Electronic Resource
    Petrology and geochemistry of the Kerguelen Archipelago basalts (South Indian Ocean): evolution of the mantle sources from ridge to intraplate position
    Amsterdam : Elsevier
    Earth and Planetary Science Letters 100 (1990), S. 59-76 
    Details
    ISSN: 0012-821X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0012-821X(90)90176-X
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  • 7
    Electronic Resource
    Electronic Resource
    The plutonic alkaline series: the problem of their origin and differentiation, the role of their mineralogical assemblages
    Amsterdam : Elsevier
    Physics of the Earth and Planetary Interiors 35 (1984), S. 212-221 
    Details
    ISSN: 0031-9201
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9201(84)90044-X
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  • 8
    Electronic Resource
    Electronic Resource
    On the presence of carnitine acetyl transferase in human platelets (1981)
    Springer
    Molecular and cellular biochemistry 37 (1981), S. 65-69 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary The presence of carnitine acetyl transferase (E.C.2.3.1.7) activity has been found for the first time in human platelets. The enzymic activity was measured by a radiometric method based on the separation of labelled acetylcarnitine and carnitine on a cation exchange column. Carnitine acetyl transferase activity closely paralleled the activity distribution of the mitochondrial marker carnitine palmitoyl-transferase. Contrary to the marker enzyme, human platelet carnitine acetyl-transferase is rather thermosensitive: 60% of its activity is lost after 10 min when kept at 37°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02354929
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  • 9
    Electronic Resource
    Electronic Resource
    Oceanic mafic granulite xenoliths from the Kerguelen archipelago (1994)
    [s.l.] : Nature Publishing Group
    Nature 367 (1994), S. 360-363 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Kerguelen plateau, in the southern Indian Ocean, extends more than 2,000 km from 46° to 64° S, with a maximum width of 700km (Fig. 1), and is the second largest oceanic plateau (2.5 x 107 km3), after the Ontong Java plateau (〉5.0 x 107 km3 (ref. 2)). Its development is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/367360a0
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  • 10
    Electronic Resource
    Electronic Resource
    The meta-igneous granulite xenoliths from Kerguelen Archipelago: evidence of a continent nucleation in an oceanic setting (1998)
    Springer
    Contributions to mineralogy and petrology 133 (1998), S. 259-283 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Xenoliths of meta-igneous origin occur as one of the two main types of ultramafic and mafic xenoliths entrained by alkaline lavas of the Kerguelen islands. These are designated type II xenoliths and are subdivided into three mineralogical groups. Subtype IIa and IIc xenoliths are interpreted as crystallisation products of basaltic melts that were emplaced near the crust-mantle boundary during the early tholeiitic–transitional magmatic activity of the Kerguelen islands. Younger magmatism became more alkaline and subtype IIb xenoliths were formed as high-pressure alkaline cumulates related to the last alkaline volcanic stage. Subsequently, the plagioclase-bearing type II rocks have been re-equilibrated under granulite facies conditions. This addition of mafic material around the crust-mantle boundary is consistent with seismic evidence for crustal thickening to 14–20 km. Calculated compressional seismic velocities (Vp) for the basic granulites are consistent with the range of observed Vp in the low-velocity region underlying the oceanic crust. Such growth in the thickness of the oceanic crust may be caused by intrusion of basalts at different levels in the lithosphere and may provide the heat responsible for granulitic metamorphism in the oceanic setting. This study suggests that basic granulites can account for the observed seismic characteristics of oceanic plateaux and can be important components of Kerguelen oceanic lithosphere where there has been large-scale magma production. Moreover we speculate that the Kerguelen islands and perhaps the surrounding plateau represent a continental nucleation process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004100050451
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