中国东部上地幔各向异性研究
摘要
对布设在中国东部的固定和流动宽频带地震台网共65个台站记录作远震SKS波形资料偏振分析,采用SC方法和叠加分析求得每一个台站的SKS快波偏振方向和快、慢波的时间延迟,获得了中国东部上地幔各向异性图像.中国东部的各向异性快波方向从华南的近EW方向到华北的NWW-SEE方向,再到东北的NW-SE方向,由南向北呈顺时针旋转的趋势.快、慢波时间延迟范围是0.41~1.52s.通过分析研究区各向异性特征,认为中国东部上地幔各向异性可能与中国大陆受印度板块与欧亚板块的碰撞以及太平洋板块和菲律宾海板块向欧亚板块下方的俯冲的共同作用有关.在中国西部地壳增厚隆起的同时,物质向东挤出,使得东部上地幔物质向东和东南方向流动.中国东部大陆岩石圈和岩石圈下的上地幔物质在板块的相互作用下产生变形,使上地幔橄榄岩等晶体的晶格优势取向沿物质流动方向.各向异性快波方向与岩石圈的伸展方向和GPS得到的速度场方向一致,表明中国东部壳幔变形具有垂直连贯变形特征.
引文
1Hess H H.Seismic anisotropy of the upper most mantle under oceans.Nature,1964,203:629—631
2Nicolas A,Christensen N I.Formation of anisotropy in upper mantle peridotites:a review,in composition structure and dynamics of the lithosphere-asthenosphere system.Geodyn Ser,1987,16:111—123
3Flesch M L,Holt W E,Silver P G,et al.Constraining the extent of crust-mantle coupling in central Asia using GPS,geologic,and shear wave splitting data.Earth Planet Sci Lett,2005,238:248—268
4Silver P G.Seismic anisotropy beneath the continents:probing the depths of geology.Annu Rev Earth Planet Sci,1996,24:385—432
5Richardson R M.Ridge forces,absolute plate motions,and the intraplate stress field.J Geophys Res,1992,97:11739—11748
6Silver P G,Chan W W.Share-wave splitting and subcontinental mantle deformation.J Geophys Res,1991,96:16429—16454
7Wang C Y,Flesch L M,Silver P G,et al.Evidence for mechanically coupled lithosphere in central Asia and resulting implications.Ge-ology,2008,36:363—366
8郑斯华,高原.中国大陆岩石层的方位各向异性.地震学报,1994,16(2):131—140
9丁志峰,曾融生.青藏高原横波分裂的观测研究.地球物理学报,1996,39(2):211—219
10王椿镛,常利军,吕智勇,等.青藏高原东部上地幔各向异性及相关的壳幔耦合型式.中国科学D辑:地球科学,2007,37(4):495—503
11常利军,王椿镛,丁志峰.云南地区SKS波分裂研究.地球物理学报,2006,49:97—204
12常利军,王椿镛,丁志峰,等.青藏高原东北缘上地幔各向异性研究.地球物理学报,2008,51(2):431—438
13姜枚,许志琴,Hirm A,等.青藏高原及其部分邻区地震各向异性和上地幔特征.地球学报,2001,22(2):111—116
14罗艳,黄忠贤,彭艳菊,等.中国大陆及邻区SKS波分裂研究.地球物理学报,2004,47(5):812—821
15Zhao L,Zheng T Y,Chen L,et al.Shear wave splitting in eastern and central China:implications for upper mantle deformation beneath continental margin.Phys Earth Planet Inter,2007,162:73—84
16Liu K H,Gao S S,Gao Y,et al.Shear wave splitting and mantle flow associated with the deflected Pacific slab beneath northeast Asia.J Geophys Res,2008,113:B01305,doi:10.1029/2007JB005178
17丁国瑜,主编.中国岩石圈动力学概论.北京:地震出版社,1991.25—39
18Tapponnier P,Peltzer G,Armijo R.On the mechanics of the collision between India and Asia.In:Coward M P,Ries A C,eds.Collision Tectonics.Geol Soc Spec Publ London,1986,19:113—157
19邱瑞照,邓晋福,周肃,等.华北地区岩石圈类型:地质与地球物理证据.中国科学D辑:地球科学,2004,34(8):689—711
20邓晋福,赵海玲,莫宣学,等.中国大陆根-柱—大陆动力学的钥匙.北京:地质出版社,1996
21Li S L,Mooney W D,Li H Y.Crustal structure of mainland China from deep seismic sounding data.Tectonophysics,2006,420:239—252
22An M,Shi Y.Lithospheric thickness of the Chinese continent.Phys Earth Planet Inter,2006,159:257—266
23Deng J F,Mo X X,Zhao H L,et al.A new model for the dynamic evolution of Chinese lithosphere:‘continental roots-plume tectonics’.Earth-Sci Rev,2004,65:223—275
24Ma X Y.Lithospheric Dynamics Map of China and Adjacent Seas(1:4000000)and Explanatory Notes.Beijing:Geological Publishing House,1987
25Xu Y G.Thermotectonic destruction of the Archean lithospheric keel beneath eastern China:evidence,timing,and mechanism.Phys Chem Earth,2001,26:747—757
26Wolfe C J,Silver P G.Seismic anisotropy of oceanic upper mantle:shear wave splitting methodologies and observations.J Geophys Res,1998,103(B1):749—771
27Vinnik L P,Farra V,Romanowicz B.Azimuthal anisotropy in the Earth from observations of SKS at Geoscope and NARS broadband stations.Bull Sesimol Soc Am,1989,79:1542—1558
28刘希强,周惠兰,李红,等.中国大陆及邻区土地幔各向异性研究.地震学报,2001,23(4):337—348
29嘉世旭,张先康.华北不同构造块体地壳结构及其对比研究.地球物理学报,2005,48(3):611—620
30吴晶,高原,陈运泰.首都圈东南部地区地壳介质各向异性.地震学报,2008,21(1):1—10
31McNamara D,Owens T,Silver P G,et al.Shear-wave anisotropy beneath the Tibetan Plateau.J Geophys Res,1994,99:13655—13665
32彭艳菊,黄忠贤,苏伟,等.中国大陆及邻区海域地壳上地幔各向异性研究.地球物理学报,2007,50(3):752—759
33Vinnik L P,Makeyeva L I,Milev A,et al.Global patterns of azimuthal anisotropy and deformations in the continental mantle.Geophys J Int,1992,111:433—447
34Gripp A E,Gordon R G.Young tracks of hotspots and current plate velocities.Geophys J Int,2002,150:321—361
35Ren J Y,Tamaki K,Li S,et al.Late Mesozoic and Cenozoic rifting and its dynamic setting in Eastern China and adjacent areas.Tec-tonophysics,2002,344:175—205
36Wang Q,Zhang P Z,Frevmuller J T,et al.Present-day crustal deformation in China constrained by global positional system measure-ments.Science,2001,294:574—577
37牛之俊,王敏,孙汉荣,等.中国大陆现今地壳运动速度场的最新观测结果.科学通报,2005,50(8):839—848
38马宗晋,陈鑫连,叶叔华,等.中国大陆现今地壳运动的GPS研究.科学通报,2001,46(13):1118—1120
2Nicolas A,Christensen N I.Formation of anisotropy in upper mantle peridotites:a review,in composition structure and dynamics of the lithosphere-asthenosphere system.Geodyn Ser,1987,16:111—123
3Flesch M L,Holt W E,Silver P G,et al.Constraining the extent of crust-mantle coupling in central Asia using GPS,geologic,and shear wave splitting data.Earth Planet Sci Lett,2005,238:248—268
4Silver P G.Seismic anisotropy beneath the continents:probing the depths of geology.Annu Rev Earth Planet Sci,1996,24:385—432
5Richardson R M.Ridge forces,absolute plate motions,and the intraplate stress field.J Geophys Res,1992,97:11739—11748
6Silver P G,Chan W W.Share-wave splitting and subcontinental mantle deformation.J Geophys Res,1991,96:16429—16454
7Wang C Y,Flesch L M,Silver P G,et al.Evidence for mechanically coupled lithosphere in central Asia and resulting implications.Ge-ology,2008,36:363—366
8郑斯华,高原.中国大陆岩石层的方位各向异性.地震学报,1994,16(2):131—140
9丁志峰,曾融生.青藏高原横波分裂的观测研究.地球物理学报,1996,39(2):211—219
10王椿镛,常利军,吕智勇,等.青藏高原东部上地幔各向异性及相关的壳幔耦合型式.中国科学D辑:地球科学,2007,37(4):495—503
11常利军,王椿镛,丁志峰.云南地区SKS波分裂研究.地球物理学报,2006,49:97—204
12常利军,王椿镛,丁志峰,等.青藏高原东北缘上地幔各向异性研究.地球物理学报,2008,51(2):431—438
13姜枚,许志琴,Hirm A,等.青藏高原及其部分邻区地震各向异性和上地幔特征.地球学报,2001,22(2):111—116
14罗艳,黄忠贤,彭艳菊,等.中国大陆及邻区SKS波分裂研究.地球物理学报,2004,47(5):812—821
15Zhao L,Zheng T Y,Chen L,et al.Shear wave splitting in eastern and central China:implications for upper mantle deformation beneath continental margin.Phys Earth Planet Inter,2007,162:73—84
16Liu K H,Gao S S,Gao Y,et al.Shear wave splitting and mantle flow associated with the deflected Pacific slab beneath northeast Asia.J Geophys Res,2008,113:B01305,doi:10.1029/2007JB005178
17丁国瑜,主编.中国岩石圈动力学概论.北京:地震出版社,1991.25—39
18Tapponnier P,Peltzer G,Armijo R.On the mechanics of the collision between India and Asia.In:Coward M P,Ries A C,eds.Collision Tectonics.Geol Soc Spec Publ London,1986,19:113—157
19邱瑞照,邓晋福,周肃,等.华北地区岩石圈类型:地质与地球物理证据.中国科学D辑:地球科学,2004,34(8):689—711
20邓晋福,赵海玲,莫宣学,等.中国大陆根-柱—大陆动力学的钥匙.北京:地质出版社,1996
21Li S L,Mooney W D,Li H Y.Crustal structure of mainland China from deep seismic sounding data.Tectonophysics,2006,420:239—252
22An M,Shi Y.Lithospheric thickness of the Chinese continent.Phys Earth Planet Inter,2006,159:257—266
23Deng J F,Mo X X,Zhao H L,et al.A new model for the dynamic evolution of Chinese lithosphere:‘continental roots-plume tectonics’.Earth-Sci Rev,2004,65:223—275
24Ma X Y.Lithospheric Dynamics Map of China and Adjacent Seas(1:4000000)and Explanatory Notes.Beijing:Geological Publishing House,1987
25Xu Y G.Thermotectonic destruction of the Archean lithospheric keel beneath eastern China:evidence,timing,and mechanism.Phys Chem Earth,2001,26:747—757
26Wolfe C J,Silver P G.Seismic anisotropy of oceanic upper mantle:shear wave splitting methodologies and observations.J Geophys Res,1998,103(B1):749—771
27Vinnik L P,Farra V,Romanowicz B.Azimuthal anisotropy in the Earth from observations of SKS at Geoscope and NARS broadband stations.Bull Sesimol Soc Am,1989,79:1542—1558
28刘希强,周惠兰,李红,等.中国大陆及邻区土地幔各向异性研究.地震学报,2001,23(4):337—348
29嘉世旭,张先康.华北不同构造块体地壳结构及其对比研究.地球物理学报,2005,48(3):611—620
30吴晶,高原,陈运泰.首都圈东南部地区地壳介质各向异性.地震学报,2008,21(1):1—10
31McNamara D,Owens T,Silver P G,et al.Shear-wave anisotropy beneath the Tibetan Plateau.J Geophys Res,1994,99:13655—13665
32彭艳菊,黄忠贤,苏伟,等.中国大陆及邻区海域地壳上地幔各向异性研究.地球物理学报,2007,50(3):752—759
33Vinnik L P,Makeyeva L I,Milev A,et al.Global patterns of azimuthal anisotropy and deformations in the continental mantle.Geophys J Int,1992,111:433—447
34Gripp A E,Gordon R G.Young tracks of hotspots and current plate velocities.Geophys J Int,2002,150:321—361
35Ren J Y,Tamaki K,Li S,et al.Late Mesozoic and Cenozoic rifting and its dynamic setting in Eastern China and adjacent areas.Tec-tonophysics,2002,344:175—205
36Wang Q,Zhang P Z,Frevmuller J T,et al.Present-day crustal deformation in China constrained by global positional system measure-ments.Science,2001,294:574—577
37牛之俊,王敏,孙汉荣,等.中国大陆现今地壳运动速度场的最新观测结果.科学通报,2005,50(8):839—848
38马宗晋,陈鑫连,叶叔华,等.中国大陆现今地壳运动的GPS研究.科学通报,2001,46(13):1118—1120
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心