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  • Articles  (122)
  • Springer  (114)
  • American Chemical Society  (8)
  • BioMed Central
  • Geosciences  (122)
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  • Articles  (122)
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  • 1
    Electronic Resource
    Electronic Resource
    Mid-crustal contact metamorphism around the Chimakurthy mafic-ultramafic complex, Eastern Ghats Belt, India (1997)
    Springer
    Contributions to mineralogy and petrology 129 (1997), S. 182-197 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Pelitic rocks were thermally metamorphosed at the contact of the Chimakurthy mafic-ultramafic igneous complex, Eastern Ghats Belt, India. The rocks show progressive change in mineralogy from biotite-sillimanite-quartz-garnet-K-feldspar (association I, 150 m from the intrusive contact) to garnet-spinel-cordierite-K-feldspar-sillimanite (association II, 20–30 m from the intrusive contact) to cordierite-K-feldspar-(cordierite-orthopyroxene-K-feldspar symplectite after osumilite)-spinel-FeTiAl oxides with/without garnet (associations III and IV, 5 m from the intrusive contact), and finally to spinel-orthopyroxene-cordierite-K-feldspar (association V, xenoliths). Oxide mineral clots in associations III and IV resemble emery-type rocks. Initial mineral reactions involved biotite-dehydration melting with partial segregation of the melt. Down-temperature mineral reactions were largely diffusion controlled and preservation of symplectitic and coronitic textures in microdomains is common. Interpretation of reaction textures in relevant petrogenetic grids for the sytems KFMASH and FMAS and combined with geothermobarometry suggest that the pelitic rocks were thermally metamorphosed at c. 6 kbar pressure along a heating-cooling trajectory within the temperature interval between c. 750 °C and c. 1000 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004100050331
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  • 2
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    Stratigraphy of the upper Gondwana formations around Sohagpur, western part of the Satpura Gondwana Basin, Central India (2016)
    Springer
    Details
    Publication Date: 2016-05-01
    Print ISSN: 0016-7622
    Electronic ISSN: 0974-6889
    Topics: Geosciences
    Published by Springer
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  • 3
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    Mid-crustal contact metamorphism around the Chimakurthy mafic-ultramafic complex, Eastern Ghats Belt, India (1997)
    Springer
    Details
    Publication Date: 1997-10-28
    Print ISSN: 0010-7999
    Electronic ISSN: 1432-0967
    Topics: Geosciences
    Published by Springer
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    PAPER CURRENT
  • 4
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure and absolute configuration of Withaperuvin E: a C28 steroidal lactone (1998)
    Springer
    Journal of chemical crystallography 28 (1998), S. 571-575 
    Details
    ISSN: 1572-8854
    Keywords: C28-Steroidal lactone ; ergostane derivatives ; antineo plastic activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The withanolide Withaperuvin E, C28H36O8, has been obtained from the air dried roots of Physalis peruviana and purified by silica gel chromatography. This compound exhibits significant antineo plastic activity. Prismatic pale yellow crystals were obtained from a methanol/acetone solution. The compound crystallizes together with a partially occupied [40(1)%] acetic acid molecule, in space group P212121, Z = 4, D c = 1.242 g cm−3, with unit, cell parameters a = 11.431(3), b = 14.104(1), c = 17.387(5)Å, V = 2803.2(11)Å3, and μ(CuKα) = 0.072mm−1. Through the X-ray analysis the molecule was found to be comprised of a steroidal skeleton with a β-oriented oxygen bridging atoms C(5) and C(6) in ring B. Steroid ring conformations are: A sofa; B sofa; C chair; D intermediate half-chair/sofa; the lactone ring E has a sofa conformation. All rings of the steroid skeleton are trans connected. The absolute configuration of the Withaperuvin E skeleton corresponds to that of naturally occurring steroids, C(18) and C(19) both being β-oriented. The partially occupied acetic acid molecule forms a hydrogen bond to the steroid molecule. Hydrogen bonding also occurs between OH(14) and a symmetry related oxygen O(20) of the steroid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1023204408338
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  • 5
    Electronic Resource
    Electronic Resource
    Deformation of pebbles in relation to associated structures in parts of Singhbhum Shear Zone, Eastern India (1977)
    Springer
    International journal of earth sciences 66 (1977), S. 175-192 
    Details
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract The Singhbhum Shear Zone separates the rocks of a highly metamorphosed northern group from an unmetamorphosed southern group. It had been recognised by earlier workers as a thrust zone in which the thrust movements were achieved by slip along a pre-existing schistosity. Deformed conglomerates crop out in discontinuous bands along the Shear Zone. Strain determinations from these conglomerates have been made to ascertain the strain pattern within the Shear Zone. None of the existing methods of determining strain from stretched pebbles can be applied to these conglomerates. An approximate value for shortening perpendicular to the schistosity can however be obtained from cross-cutting buckled veins. Detailed study of various small-scale structures clearly indicates that the principal structures of this region cannot be explained simply by a slipping on the schistosity.
    Abstract: Résumé La zone de cisaillement de Singhbhum sépare les roches très métamorphiques au nord, de celles d'un groupe non-métamorphique au sud. Elle avait été reconnue lors de recherches précédentes comme étant la base de charriages suivant laquelle la poussée se serait faite par glissement le long d'une schistosité pré-existante. Des conglomérats déformés affleurent par bandes discontinues le long de cette zone. Grâce à ces conglomérats, des estimations sur la déformation ont été faites pour définir le style de déformation dans la zone de glissement. Une étude détaillée de différentes structures à petite échelle indique clairement qu'on ne peut pas expliquer les principales structures de cette région uniquement par un glissement sur la schistosité.
    Notes: Zusammenfassung Die Singhbhum-Scherzone trennt die Gesteine der stark metamorphen nördlichen Gruppe von denjenigen einer nicht metamorphen südlichen Gruppe. Nach früheren Autoren ist es eine Überschiebungszone, worin die Überschiebungsbewegungen durch das Gleiten entlang einer älteren Schieferung zustande kamen. Deformierte Trümmergesteine treten in ununterbrochenen Bändern entlang der Scherzone auf. Man hat Deformationsbestimmungen von diesen Trümmergesteinen gemacht, um das Deformationsbild in der Scherzone zu erklären. Eine ausführliche Untersuchung der verschiedenen kleinmaßstäblichen Strukturen zeigt deutlich, daß die Hauptstrukturen dieser Gegend nicht einfach durch das Gleiten auf der Schieferung erklärt werden können.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01989571
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  • 6
    Electronic Resource
    Electronic Resource
    Spectral analyses of offshore magnetic data for computing depths to the basement rocks (1984)
    Springer
    Marine geophysical researches 6 (1984), S. 245-256 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract This paper deals with the computation of the depth to the magnetic interface from the total magnetic field intensity values obtained along profiles in the offshore area between Vengurla and Rajapur bay off the West Coast of India, by the application of one dimensional spectral analysis method. From the response characteristics of the total field magnetic values it is surmised that the magnetic interface may be identified with the Deccan trap series of rocks which are likely to form the magnetic basement rocks in this area. The plot of depths to the basement rocks as obtained from spectral analysis indicates that the basement is sloping towards outer edge of the Continental Shelf though not uniformly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00286528
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  • 7
    Electronic Resource
    Electronic Resource
    Generation of waves in an infinite space due to an explosion at the centre of cavity (1971)
    Springer
    Pure and applied geophysics 86 (1971), S. 18-27 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The object of this paper is to investigate the propagation of elastic waves in an infinite elastic space due to an explosion at the centre of a spherical cavity. The explosion takes place accompanied by thermal change due to which it is assumed that the material nearer to the cavity differs from that away from the same. It is also assumed that the explosion causes: i) a periodic force -σ rr =p(t)=p 0 e iwt on the surface of the cavity. ii) an impulsive force -σ rr =p(t)=p 0 H (t) on the surface of the cavity,H(t) being Heaviside unit function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875070
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  • 8
    Electronic Resource
    Electronic Resource
    Onlamb's problem in a magneto-elastic initially stressed conducting medium (1971)
    Springer
    Pure and applied geophysics 87 (1971), S. 66-72 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The object of the present paper is to investigate the so-called planeLamb's problem in an initially stressed magneto-elastic semi-space bounded by a plane. The results obtained in this investigation are in agreement with the corresponding results of the classical planeLamb's problem when the semi-space is supposed to be initially unstressed and non-magnetic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878909
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  • 9
    Electronic Resource
    Electronic Resource
    Magneto-elastic waves and disturbances in initially stressed conducting media: II (1972)
    Springer
    Pure and applied geophysics 101 (1972), S. 54-66 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The paper is concerned with the investigation of the magneto-elastic waves and disturbances in initially stressed conducting media. Firstly, (a) the steady state response to moving loads in a magneto-elastic initially stressed conducting medium under an uniaxial tension has been discussed. Secondly, (b) the Lamb's problem corresponding to a line load suddenly applied in a magneto-elastic initially stressed conducting half-space bounded by a plane under uniaxial tension has been investigated. The final results obtained in both cases are in agreement with the corresponding classical problems when the initial tension is zero and the magnetic field is absent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876774
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  • 10
    Electronic Resource
    Electronic Resource
    Interpretation of the gravity effect due to two-dimensional asymmetrical triangular prism by fourier transforms (1977)
    Springer
    Pure and applied geophysics 115 (1977), S. 647-654 
    Details
    ISSN: 1420-9136
    Keywords: Gravity interpretation (2d) ; Fourier transform in gravity interpretation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Fourier transforms of the theoretical gravity effect due to a two-dimensional asymmetrical triangular prism have been derived. Evaluation of the parameters from the analysis of the Fourier Spectra has been outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876129
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