The Kaapvaal craton seismic anisotropy: Petrophysical analyses of upper mantle kimberlite nodules
作者： W. Ben-Ismail , G. Barruol , D. Mainprice
DOI: 10.1029/2000GL012419
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摘要: A dense network of seismic stations has been deployed on the Kaapvaal craton (South Africa) to investigate upper mantle structures. In order bring independent petrophysical constraints, we analyze a direct sampling cratonic and determine properties 48 nodules brought up Earth's surface by kimberlite eruptions. Seismic these are calculated from olivine pyroxene crystal preferred orientations single elastic constants. Despite variations in compositions, microstructures crystallographic orientations, anisotropy is rather homogeneous throughout craton. Mean S-wave weak (2.64 %), which compatible with small measured SKS wave splitting (mean delay time 0.62 s).
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univ-montp2.fr 参考文章(16)
D. Mainprice, G. Barruol, W. Ben Ismaïl, The Seismic Anisotropy of the Earth's Mantle: from Single Crystal to Polycrystal Geophysical monograph. ,vol. 117, pp. 237- 264 ,(2013) , 10.1029/GM117P0237
David Mainprice, Paul G. Silver, Interpretation of SKS-waves using samples from the subcontinental lithosphere Physics of the Earth and Planetary Interiors. ,vol. 78, pp. 257- 280 ,(1993) , 10.1016/0031-9201(93)90160-B
David Mainprice, Michel Humbert, Methods of calculating petrophysical properties from lattice preferred orientation data Surveys in Geophysics. ,vol. 15, pp. 575- 592 ,(1994) , 10.1007/BF00690175
Guilhem Barruol, Hartmut Kern, Seismic anisotropy and shear-wave splitting in lower-crustal and upper-mantle rocks from the Ivrea Zone—experimental and calculated data Physics of the Earth and Planetary Interiors. ,vol. 95, pp. 175- 194 ,(1996) , 10.1016/0031-9201(95)03124-3
Shaocheng Jip, Xiaoou Zhao, Don Francis, Calibration of shear-wave splitting in the subcontinental upper mantle beneath active orogenic belts using ultramafic xenoliths from the canadian cordillera and alaska Tectonophysics. ,vol. 239, pp. 1- 27 ,(1994) , 10.1016/0040-1951(94)90104-X
Walid Ben Ismaı̈l, David Mainprice, An olivine fabric database: an overview of upper mantle fabrics and seismic anisotropy Tectonophysics. ,vol. 296, pp. 145- 157 ,(1998) , 10.1016/S0040-1951(98)00141-3
Robert S. Crosson, Jia-Wen Lin, Voigt and Reuss prediction of anisotropic elasticity of dunite Journal of Geophysical Research. ,vol. 76, pp. 570- 578 ,(1971) , 10.1029/JB076I002P00570
F. R. BOYD, J. J. GURNEY, Diamonds and the african lithosphere. Science. ,vol. 232, pp. 472- 477 ,(1986) , 10.1126/SCIENCE.232.4749.472
Brent L. Adams, Stuart I. Wright, Karsten Kunze, Orientation imaging: The emergence of a new microscopy Metallurgical transactions. A, Physical metallurgy and materials science. ,vol. 24, pp. 819- 831 ,(1993) , 10.1007/BF02656503
C. Long, N.I. Christensen, Seismic anisotropy of South African upper mantle xenoliths Earth and Planetary Science Letters. ,vol. 179, pp. 551- 565 ,(2000) , 10.1016/S0012-821X(00)00135-7