斜长石组构与下地壳各向异性PLAGIOCLASE FABRICS AND SEISMIC ANISOTROPY OF THE LOWER CRUST
金淑燕
摘要(Abstract):
着重阐述了下地壳各向异性特征与成因、研究内容和方法、各向异性动力学意义 ,并强调指出斜长石在下地壳物理环境下的塑性变形过程中形成的组构或晶格优选方法 ( LPO)是下地壳地震波各向异性之主因。
关键词(KeyWords): 下地壳;斜长石;组构;各向异性;动力学意义
基金项目(Foundation): 国家重点基础研究项目!(G19990 75 5 0 1);; 国家自然科学基金资助项目!( 4 9872 0 70 )
作者(Author): 金淑燕
Email:
DOI:
参考文献(References):
- [1] Nicolas A,Christesen N I.Formation of anisotropy of theupper mantle.In:Funchs K ed.Composition structure anddynamics of the lithosphere-ashenosphore system [J] .Geodynamics Ser.,1987,11:111-12 3
- [2 ] Hirm A,Jiang M,Sapin M et al. Seismic anisotropy as anindicator of mantle flow beneath the Himalayas and Tibet[J] .N ature,1995 ,3 75 :5 71-5 74
- [3 ] Silver P G,Chan W W. Shear-wave splitting andsubcontinental mantle deformation [J] . J. Geop hy. Res.,1991,16:42 9-4 5 4
- [4] 金淑燕 .大陆岩石圈各向异性和动力学意义 [A] .见 :张炳熹主编 .岩石圈研究的现代方法 [C] .北京 :原子能出版社 ,1997.79-88
- [5 ] Mainprice D,Nicolas A.Development of shape and latticepreferred orentation:application to seismic anisotropy of thelower crust[J] .J.Struct.Geol.,1989,11( 1-2 7) :89-111
- [6] Herquel G,Wittlinger G,Guilbert J.Anisotropy and crustalthichness of Northern-Tibet.New Constrains for tectonicmodeling[J] .Geophys.Res.Lett.,1995 ,2 2 :192 5 -192 8
- [7] Carbonell R,Smithson S B.L arge-scale anisotropy with thecrust in the Basin and Range Provinec[J] .Geology,1991,19:698-70 1
- [8] Kaneshima S.Origin of crustal anisotropy:shear-wave splittingstudies in Japan[J] .J.Geophys.Res.,1990 ,95 :12 1-13 3
- [9] 金淑燕 .上地幔岩石组构和各向异性 [J] .地质科技情报 ,1993 ,12 ( 3 ) :3 2 -3 8
- [10 ] Wenjing Z.Deep Seism ic reflection evidences for continentalunderthrusting beneath Southern Tibet[J] . N ature,1993 ,3 66:5 5 7-5 5 9
- [11] Siegesmund S,Kruhl J H,Lüschen E. Petrophysical andseism ic features of the exposed lower continental crust inCalabria ( Italy) :field observation versus m odelling[J] .Geotekt.F orsch.1996,85 :12 5 -163
- [12 ] Clement W P,Carbonell R,Smith S B.Shear-wave splitting inthe lower crust beneath the Archean Crust of SoutheastGreenland[J] .Tectonop hysics,1992 ,2 3 2 :195 -2 10
- [13 ] Lüesehen E,Nolte B,Fuches K.Shear-wave splitting for ananisotropic lower crust beneath the Black Forest,SoutheastGermany[J] .Tectonophysics,1990 ,173 :483 -4 93
- [14 ] Babuska V.Anisotropy of vp and vsin rock-forming minerals[J] .J.Geophysics,1981,5 0 :1-6
- [15 ] Ji S C,Mainprice D. Natural deformation fabrics ofplagioclase:implication for slip system and seismicanisotropy[J] .Tectonophysics,1988,14 7:14 5 -163
- [16] Shelley D. L gneous and metam orphic rocks under themicroscope[M] .L ondon:Chapman &Hall,1992 .3 5 5 -3 5 6
- [17]翟明国 ,郭敬辉 ,阎月华等 .太古宙克拉通垂直下地壳剖面 :华北怀安—丰镇—尚义的麻粒岩—角闪岩系 [J] .岩石学报 ,1996,12 ( 2 ) :2 2 2 -2 3 7
- [18] Kern H,Schenk V.Elastic wave velocities in rocks from alower crustal section in Southern calabria ( Italy) [J] .Phys.Earth Planet.Interiors,1985 ,40 :14 7-160
- [19] Kern H,Wenk H R.Fabric-relatived velocity anisotropy andshear wave splitting in rocks from the Santa Rosa mylonitezone,California [J] . J. Geop hys. Res.,1990 ,95 :112 13 -112 2 3
- [2 0 ] Siegesmund S,Kern H.Velocity anisotropy and shear-wavesplitting in rocks from mylonite belt along the insubric line( L vera zone,Italy) [J] .Earth Planet.Sci.L et.,1990 ,99:2 9-4 7
- [2 1] Ji S C,Salisbury M H.Shear-wave velocities,anisotropy andsplitting in high-grade m ylonite[J] .Tectonop hysics,1993 ,2 2 1:45 3 -4 73
- [2 2 ]吕庆田 ,马开义 ,姜枚 .青藏高原南部的横波各向异性 [J] .地震学报 .1996,18:2 15 -2 2 3
- [2 3 ]史大年 ,董英君 ,姜枚 .西藏定日—青海格尔木上地幔各向异性研究 [J] .地震学报 ,1996,18:2 0 1-2 0 7
- [2 4]金振民 ,Ji S C,金淑燕 .橄榄石晶格优选方位和上地幔地震各向异性 [J] .地球物理学报 ,1994,3 7:469-4 77