全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地质学报  2006 

东喜马拉雅构造结陆内变形过程的研究

Keywords: 东喜马拉雅构造结,陆内变形,南向挤出,北向楔入

Full-Text   Cite this paper   Add to My Lib

Abstract:

在东喜马拉雅构造结识别出“南向挤出”与“北向楔入”两大构造。前者包括倾向北、头朝南的一条正断层和两条分别被称为上部和下部的逆冲断层。南迦巴瓦和派乡杂岩借助这些断层从北部的冈底斯构造单元之下向南折返至地表附近。后者包括一个北东走向的推覆体和两个北北东走向、南倾的低角度推覆体,将东久、南迦巴、派乡等杂岩又北(东)向楔入冈底斯构造单元之中。独居石TIMSU-Th-Pb测年表明“南向挤出”构造中的正断层和下部逆冲断层可能分别在7.9Ma、10.7Ma时活动。锆石SHRIMP与金云母K-Ar测年结果限定上部逆冲断层活动时限介于6.2±0.2Ma和5.5±0.2Ma之间,即“南向挤出"中的上、下两条逆冲断层为逆序的逆冲断层。锆石SHRIMP和角闪石Ar-Ar测年还表明东喜马拉雅构造结核心部位的“北向楔入”很可能发生于3.0Ma和1.5Ma之间。

References

[1]  常承法,潘裕生,郑祥生,等.1982.青藏高原地质构造.北京:科学出版社,1~91.
[2]  张进江,季建清,钟大赉,等.2003.东喜马拉雅南迦巴瓦构造结的构造格局及形成过程探讨.中国科学,33(4):373~383.
[3]  张兆忠,邓万明.1981.波密-察隅地区的中酸性侵入岩,见:中国科学院青藏高原综合科学考察队主编,西藏岩浆活动和变质作用.北京:科学出版社,112~130.
[4]  周云生,张魁武.1981.冈底斯中酸性侵入岩带,见:中国科学院青藏高原综合科学考察队主编,西藏岩浆活动和变质作用.北京:科学出版社,50~98.
[5]  Booth A L,Zeitler P K,Kidd W S F,et al.2004.U-Pb zircon constraints on the tectonic evolution of southeastern Tibet,Namche Barwa area.Am.J.Sci.,304:889~929.
[6]  Burg J P,Nievergelt P,Oberli F,et al.1998.The Namche-Barwa syntaxis:evidence for exhumation related to compressional crustal folding.J.Asian Earth Sci.,16:239~252.
[7]  Burg J P,Podladchikov Y.2000.From buckling to asymmetric folding of the continental lithosphere:Numerical modelling and application to the Himalayan syntaxes.In:Khan,M.A.,Treloar,P.J.,Searle,M.P.,Jan,M.Q.(eds.) Tectonics of the Nanga Parbat syntaxis and the western Himalaya,170.Geological Society,special publications,London.219~236.
[8]  Geng Q,Pang G,Zheng L,et al.2006.The eastern Himalayan syntaxis:Major tectonic domains,ophiolitic mélanges and geological evolution.J.Asian Earth Sci.(in press)
[9]  Ludwig K R.1999.Isoplot/Ex,version 2.06:A geochronological tool-kit for Microsoft Excel.Berkeley Geochronology Center,Special Publication 1a:1~49.
[10]  Poller U,Liebetrau V,Todt W.1997.U-Pb single-zircon dating under cathodoluminescence control (CLC-method):application to polymetamorphic orthogneisses.Chem.Geol,139:287~297.
[11]  Singh S.2006.Geology of the east,west and upper Siang districts,Arunachal Pradesh-A synthesis.In:Saklani ed.) Himalaya (Geological Aspects),4:235~273.
[12]  Stacey J S,Kramers J D.1975.Approximation of terrestrial lead isotope evolution by a two stage model.Earth Planet.Sci.Lett.,26:207~221.
[13]  Vavra G,Schmidt R,Gebauer D.1999.Internal morphology,habit and U-Th-Pb microanalysis of amphibolite-to-granulite facies zircons:Geochronology of the Ivrea Zone (Southern Alps):Contrib.Mineral.Petrol.,134:380~404.
[14]  邓万明.1992.青藏高原的陆内俯冲带及其岩浆活动,见:中国青藏高原研究会第一届学术讨论会论文选.北京:科学出版社,256~262.
[15]  刘焰,钟大赉.1998a.东喜马拉雅构造结地质构造框架.自然科学进展,8:506~509.
[16]  刘焰,钟大赉.1998b.东喜马拉地区高压麻粒岩岩石学研究及构造意义.地质科学,33:267~281.
[17]  涂光炽,张玉泉,王中刚,等.1982.西藏南部花岗岩类地球化学.北京:科学出版社,1~190.
[18]  张旗,李?华.1981.西藏的变质带和变质作用,见:中国科学院青藏高原综合科学考察队主编,西藏岩浆活动和变质作用.北京:科学出版社,71~312.
[19]  郑锡澜,常承法.1979.雅鲁藏布江下游地区地质构造特征.地质科学,2:116~125.
[20]  钟大赉,吴根耀,丁林.1998.藏东新生代陆内变形特征.见:潘裕生,孔祥儒主编,青藏高原岩石圈结构演化和动力学.广州:广东科学技术出版社,335~364.
[21]  Burg J P,Davy P,Nievergelt P,et al.1997.Exhumation during crustal folding in the Namche Barwa syntaxis.Terra Nova,9:53~56.
[22]  Copeland P,Parrish R R,Harrison T M.1988.Identification of inherited radiogenic Pb in monazite and its implications for U-Pb systematics.Nature,333:760~763.
[23]  Liu Y,Zhong D.1997.Petrology of high-pressure granulites from the eastern Himalayan syntaxis.J.Metam.Geol.,15:451~166.
[24]  Liu Y,Berner Z,Massonne H-J,Zhong D.2006a.Carbonatite-like dykes from the eastern Himalayan syntaxis:Geochemical,isotopic,and petrogenetic evidence for melting of metasedimentary carbonate rocks within the orogenic crust.J.Asian Earth Sci.,26:105~120.
[25]  Liu Y,Massonne H J,Siebel W,Xiao X.2006b.Geological aspects of the eastern Himalayan syntaxis:New constraints from structural,petrologic and zircon SHRIMP data.In:Saklani (ed.) Himalaya (Geological Aspects),4:325~388.
[26]  Ludwig K R.1988.Pbdat for MS-DOS-a computer program for IBM-PC compatibles for processesing raw Pb-U-Th isotope data.Open-file report 88~542,US Geol.Surv.1~37.
[27]  Parrish R R.1990.U-Pb dating of monazite and its application to geological problems.Can.J.Earth Sci.,27:1431~1450.
[28]  Schaerer U.1984.The effect of initial 230Th disequilibration on U-Pb ages:the Makalu case.Earth.Planet.Sci.Lett.,67:191~204.
[29]  Vavra G.1990.On the kinematics of zircon growth and its petrogenetic significance:A cathodoluminescence study:Contrib.Mineral.Petrol.,106:90~99.
[30]  Zeitler P K,Meltzer A S,Koons P Q,et al.2001.Erosion,Himalayan geodynamics,and the geomorphology of metamorphism.GSA Today,11:4~8.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133