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东北帕米尔中新世中下地壳物质的折返过程:公格尔西滑脱剪切带的构造变形与年代学证据
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  • 英文篇名:Exhumation of the Miocene Mid-Lower Crust Material in Northeast Pamir:Structural Deformation and Geochronological Evidence from the West Kongur Detachment
  • 作者:蔡志慧 ; 许志琴 ; 曹汇 ; 梁凤华
  • 英文作者:CAI Zhihui;XU Zhiqin;CAO Hui;LIANG Fenghua;Key Laboratory of Continental Dynamics,Institute of Geology,Chinese Academy of Geological Sciences;
  • 关键词:东北帕米尔 ; 公格尔 ; 滑脱剪切带 ; 新生代变质岩 ; 中-下地壳
  • 英文关键词:northeast Pamir;;Kongur;;detachment;;Cenozoic metamorphic rocks;;Mid-Lower Crust
  • 中文刊名:DZXE
  • 英文刊名:Acta Geologica Sinica
  • 机构:中国地质调查局大陆动力学研究中心中国地质科学院地质研究所;
  • 出版日期:2016-11-15
  • 出版单位:地质学报
  • 年:2016
  • 期:v.90
  • 基金:中国地质调查局项目(编号1211302108022;12120115027001及12120115002101);; 国家自然科学基金项目(编号41302166)资助的成果
  • 语种:中文;
  • 页:DZXE201611003
  • 页数:12
  • CN:11
  • ISSN:11-1951/P
  • 分类号:32-43
摘要
公格尔西滑脱剪切带位于东北帕米尔公格尔片麻岩穹窿西缘。通过我们详细的野外观测、显微构造观察、石英电子背散射衍射(EBSD)测试以及锆石U-Pb测年,对公格尔西滑脱剪切带的几何学、运动学特征及其形成演化时限进行了研究。公格尔西滑脱剪切带糜棱岩中大量的石榴子石、矽线石和蓝晶石等表明其为高级变质产物。S/C组构、旋转碎斑及不对称褶皱等变形现象说明剪切带上盘向W或SW低角度剪切的运动特征。高级变质糜棱岩和浅色岩脉记录约20 Ma的206 U-238Pb锆石年龄,说明公格尔西滑脱剪切带初始形成于早中新世。结合前人研究成果,我们认为公格尔西滑脱剪切带曾是狭长的帕米尔中下地壳滑脱带的最北段。由于新生代印度亚洲大陆碰撞以后印度板块仍持续向N俯冲推进,帕米尔地壳由S向N开始增厚,进变质作用最初发生于南帕米尔,约20 Ma时到达北帕米尔。东北帕米尔中下地壳物质开始折返于中新世中期。而直到6~4 Ma,东北帕米尔公格尔地区开始快速隆起,此时公格尔新生代高级变质岩才快速折返。
        The West Kongur Detachment(WKD)is located in the w estern margin of the Kongur gneiss dome in northeast Pamir.Based on the detailed field investigation,microstructure observation,quartz EBSD testing and zircon U-Pb dating,this study analyzed the geometry,kinematics and evolution time of the WKD.The presence of garnet,sillimanite and kynite in the mylonites from the WKD indicates that the shear zone moved from mid-lower crust to the surface.S/C fabric,rotating porphyroclasts and asymmetric folds in the WKD indicate the characteristic of W-or SW-dipping shearing movement of the hanging wall of the shearing zone.High-grade metamorphic mylonites and leucosomes records the zircon 206 U-238 Pb age of20 Ma,suggesting that the WKD initially formed at early Miocene.Combined with previous studies,it can be concluded that the WKD should be the northernmost segment of Cenozoic Pamir mid-lower crust.Due to the fact that the Indian plate continued to northward thrusting after the Cenozoic Indian-Asian collision and this led to thickening of the Pamir crust from south to north,prograde metamorphism firstly occurred in south Pamir in the Eocene,and reached northern Pamir~20 Ma later.The exhumation of Mid-Lower crust materials in northeastern Pamir started in middle Miocene.It was not until 6~4 Ma when the Kongur region started to uplift rapidly and the Cenozoic metamorphic rocks exhumed quickly.
引文
Amidon W H,Hynek S A.2010.Exhumational history of the north central Pamir.Tectonics,29(5):5966~5983.
    Aoya M,Wallis S R,Terada K,Lee J,Kawakami T,Wang Y,Heizler M.2005.North-south extension in the Tibetan crust triggered by granite emplacement.Geology,33(11):853~856.
    Arnaud N O,Brumel M,Cantagrel J M,Cantagre J M,Tapponnier P.1993.High cooling and denudation rates at Kongur Shan,Eastern Pamir(Xinjiang,China)revealed by 40 Ar/39 Ar alkali feldspar thermochronology.Tectonics,12(6):1335~1346.
    Beloussov V,Belyaevsky N,Borisov A,Volvovsky B S,Volkovsky I S,Resvoy D P,Tal-Virsky B B,Marussi A,Finetti J.1980.Structure of the lithosphere along the deep seismic sounding profile:Tien Shan-Pamirs-Karakorum-Himalayas.Tectonophysics,70(3~4):193~221.
    Brunel M,Arnaud N,Tapponnier P,Pan Y,Wang Y.1994.Kongur Shan normal fault:Type example of mountain building assisted by extension(Karakoram fault,eastern Pamir).Geology,22:707~710.
    Burtman V S,Molnar P.1993.Geological and geophysical evidence for deep subduction of continental crust beneath the Pamir.Geological Society of America Special Paper,286:1~76.
    Burtman V S.2000.Cenozoic crustal shortening between the Pamir and Tien Shan and a reconstruction of the Pamir-Tien Shan transition zone for the Cretaceous and Paleogene.Tectonophysics,319(2):69~92.
    Cao Kai,Bernet M,Wang Guocan,van der Beek P,Wang An,Zhang Kexin,Enkelmann E.2013.Focused PlioceneQuaternary exhumation of the Eastern Pamir domes,western China.Earth and Planetary Science Letters,363(2):16~26.
    Chevalier M L,Pan J W,Li H B,Liu D L,Wang M.2015.Quantification of both normal and right-lateral late Quaternary activity along the Kongur Shan extensional system,Chinese Pamir.Terra Nova,3(5):545~552.
    Cowgill E.2010.Cenozoic right-slip faulting along the eastern margin of the Pamir salient,northwestern China.GSABulletin,122(1):145~161.
    England P and Houseman G.1989.Extension during continetal convergence,with application to the Tibetan Plateau.Journal of Geophysical Research,94(B12):17561~17569.
    Grew E S,Pertsev N N,Yates M G,Christy A G,Marquez N,Chernosky J V.1994.Sapphirine+forsterite and sapphirine+humitegroup minerals in an ultra-magnesian lens from Kuhilal,SW Pamirs,Tajikistan:Are these assemblages forbidden?Journal of Petrology,35(5):1275~1293.
    Grujic D,Casey M,Davidson C,Hollister L S,Kündig R,Pavlis T,Schmid S.1996.Ductile extrusion of the higher himalayan crystalline in bhutan:evidence from quartz microfabrics.Tectonophysics,260(s1~3):21~43.
    Hong Jun,Ji Wenhua,Zhang Huishan,Yao Wenguang,Fan Baocheng,Liu Mingyi,Luo Yanjun.2015.LA-ICP-MS zircon U-Pb dating and geochemistry of the Dugeli alkali-rich porphyries on the eastern margin of Pamir and their tectonic implications.Acta Geologica Sinica,89(9):1643~1654(in Chinese with English abstract).
    Hou Kejun,Li Yanhe,Tian Yourong.2009.In situ U-Pb zircon dating using laser ablation-multi ion couting-ICP-MS.Mineral Deposits,28(4):481~492(in Chinese with English abstract).
    Hubbard M S,Grew E S,Hodges K V,Yates M G,Pertsev N N.1999.Neogene cooling and exhumation of upperamphibolitefacies"white schists"in the southwest Pamir Mountains,Tajikistan.Tectonophysics,305:325~337.
    Jiang Yaohui,Jia Ruya,Liu Zheng,Liao Shiyong,Zhao Peng,Zhou Qing.2013.Origin of Middle Triassic high-K calcalkaline granitoids and their potassic microgranular enclaves from the western Kunlun orogen,northwest China:A record of the closure of Paleo-Tethys.Lithos,156~159(1):13~30.
    Ke Shan,Mo Xuanxue,Luo Zhaohua,Liang Tao,Zhan Huaming,Li Li,Li Wentao.2006.Petrolgenesis and geochemistry of Cenozoic Taxkorgan alkalic complex and its geological significance.Acta Petologica Sinica,22(4):905~915(in Chinese with English abstract).
    Konstanze S,Lothar R,Daniel R,Klaus S,Vladislav M,Maria W,Richard G,Project TIPAGE member.2013.The giant Shakhdara migmatitic gneiss dome,Pamir,India-Asia collision zone:1.Geometry and kinematics.Tectonics,32:948~979.
    Kumar P,Yuan X,Kind R,Kosarev G.2005.The lithosphere‐asthenosphere boundary in the tien shan‐karakoram region from s receiver functions:evidence for continental subduction.Geophysical Research Letters,32(7):99~119.
    Lee J,Whitehouse M J.2007.Onset of mid-crustal extensional flow in southern Tibet:Evidence from U/Pb zircon ages.Geology,35:45~48.
    Li Haibing,Valli F,Xu Zhiqin,Yang Jingsui,Tapponnier P,Lacassin R,Chen Songyong,Qi Xuexiang,Chevalier M L.2006.Deformation and tectonic evolution of the Karakorum fault,western Tibet.Geology in China,33(2):239~255(in Chinese with English abstract).
    Liu Yongsheng,Gao Shan,Hu Zhaochu,Gao Changgui,Zong Keqing,Wang Dongbing.2010.Continental and oceanic crust recycling-induced melt-peridotite interactions in the TransNorth China Orogen:U-Pb dating,Hf isotopes and trace elements in zircons from mantle xenoliths.Journal of Petrology,51:537~571.
    Luo Zhaohua,Mo Xuanxue,Ke Shan.2003.Ages of Taxkorgan alkaline intrusive complex and their geological implications.Xinjiang Geology,21(1):46~50(in Chinese with English abstract).
    Madin P,Lawrence R D,Ur-Rehman S.1989.The northwestern Nanga Parbat massif:Evidence for crustal uplift at the northwestern comer of the Indian craton,In:Malinconico L L,Lillie R J,eds.Tectonics of the Western Himalayas.Special Paper of Geological Society of Aerica,232:169~182.
    Mainprice D,Bouchez J L,Blumenfeld P,TubiàJ M.1986.Dominant c slip in naturally deformed quartz:implications for dramatic plastic softening at high temperature.Geology,14(10):819~822.
    Matte P,Mattauer M,Olivet J M,Griot D A.1997.Continental subduction beneath Tibet and the Himalayan orogen,a review.Terra Nova,9(5~6):264~270.
    Matte P,Tapponnier P,Arnaud N,Bourjot L,Avouac J P,Vidal Ph,Liu Q,Pan Y S,Wang Y.1996.Tectonics of Western Tibet,between the Tarim and the Indus.Earth and Planetary Science Letters,142:311~330.
    Molnar P,England P,Martinod J.1993.Mantle dynamics,uplift of the Tibetan Plateau,and the Indian Monsoon.Reviews of Geophysics,31(4):357~396.
    Molnar P,Tapponnier P.1975.Cenozoic tectonics of Asia;effects of a continental collision.Science,189(1):419~426.
    Molnar P,Tapponnier P.1978.Active tectonics of Tibet.Journal of Geophysical Research,85:5361~5375.
    Negredo A,Replumaz A,Villasenor A,Guillot S.2007.Modeling the evolution of continental subduction processes in the PamirHindu Kush region.Earth and Planetary Science Letters,259(1~2):212~225.
    Neumann B.2000.Texture development of recrystallised quartz polycrystals unravelled by orientation characteristics.Journal of Structural Geology,22(11):1695~1711.
    Patriat P,Achache J.1984.India-Eurasia collision chronology has implications for crustal shortening and driving mechanism of plates.Nature,311:615~21.
    Robinson A C,Yin An,Manning C E,Harrison T M,Zhang Shuanhong,Wang Xiaofeng.2004.Tectonic evolution of the northeastern Pamir:Constraints from the northern portion of the Cenozoic Kongur Shan extensional system,western China.Geological Society of America Bulletin,116(7):953.
    Robinson A C,Mihai D,Thomas J L.2012.Detrital zircon and isotopic constraints on the crustal architecture and tectonic evolution of the northeastern Pamir.Tectonics 31:TC2016,doi:10.1029/2011TC003013,2012.
    Robinson A C,Yin An,Manning C E,Harrison T M,Zhang Shuanhong,Wang Xiaofeng.2007.Cenozoic evolution of the eastern Pamir:Implications for strain-accommodation mechanisms at the western end of the Himalayan-Tibetan orogen.Geological Society of America Bullitin,119(7~8):882~896.
    Schmidt J,Hacker B R,Ratschbacher L,Stübner K,Stearns M,Kylander-Clark A,Cottle J M,Webb A A G,Gehrels G,Minaev V.2011.Cenozoic deep crust in the pamir.Earth and Planetary Science Letters,312(s3~4):411~421.
    Schneider D A,Edwards M A,Kidd W S F,Khan M A,Seeber L,Zeitler P K.1999.Tectonics of Nanga Parbat,western Himalaya:synkinematic plutonismwithin doubly vergent shear zones of a crustal-scale pop-up structure.Geology,27(11):999~1002.
    Schwab M,Ratschbacher L,Siebel W,Mcwilliams M,Minaev V,Lutkov V,Chen F,Stanek K,Nelson B,Frisch W,Wooden JL.2004.Assembly of the pamirs:age and origin of magmatic belts from the southern tien shan to the southern pamirs and their relation to tibet.Tectonics,23(4):443~459.
    Smit M A,Ratschbacher L,Kooijman E,Stearns M A.2014.Early evolution of the Pamir deep crust from LU-Hf and U-Pb geochronology and garnet thermometry.Geology,42(12):1047~1050.
    Sobel E R,Schoenbohm L M,Chen Jie,Thiede R,Stockli D F,Sudo M,Strecker M R.2011.Late Miocene-Pliocene deceleration of dextral slip between Pamir and Tarim:Implications for Pamir orogenesis.Earth and Planetary Science Letters,304(102):369~378.
    Stipp M,Stünitz H,Heilbronner R,Schimid S M.2002.The eastern Tonale fault zone:a‘natural laboratory’for crystal plastic deformation of quartz over a temperature range from 250to 700℃.Journal of Structural Geology,24(12):1861~1884.
    Strecker M R,Frisch W,Hamburger M W,Ratschbacher L,Semiletkin S,Zamoruyev A,Sturchio N.1995.Quaternary deformation in the Eastern Pamirs,Tadzhikistan and Kyrgyzstan.Tectonics,14(5):1061~1079.
    Stübner K,Ratschbacher L,Rutte D,Stanek K,Minaev V,Wiesinger M,Gloaguen R,Project TIPAGE member.2013.The giant Shakhdara migmatitic gneiss dome,Pamir,IndiaAsia collision zone:1.Geometry and kinematics.Tectonics,32:948~979.
    Tapponnier P,Mattauer M,Proust F,Cassaigneau C.1981.Mesozoic ophiolites,sutures,and large-sale tectonic movements in Afghanistan.Earth and Planetary Science Letters,52:355~371.
    Tapponnier P,Molnar P.1976.Slip line field theory and large scale continental tectonics.Nature,264:319~324.
    Tapponnier P,Peltzer G,Armijo R.1986.On the mechanics of the collision between India and Asia.In:Coward M P,Ries A C,eds.Collision Tectonics.Geological Society of America,19:115~157.
    Tapponnier P,Xu Zhiqin,Roger F,Meyer B,Arnaud N,Wittlinger G,Yang Jingsui.2001.Oblique stepwise rise and growth of thetibet plateau.Science,294(23):1671~1677.
    Wang Jianping.2008.Geological features and tectonic significance of melange zone in the Taxkorgan area,West Kunlun.Geological bulletin of China,27(12):2057~2066(in Chinese with English abstract).
    Xu Zhiqin,Wang Qin,Li Zhonghai,Li Huaqi,Cai Zhihui,Liang Fenghua,Dong Hanwen,Cao Hui,Chen Xijie,Huang Xuemeng,Wu Chan,Xu Cuiping.2016a.Indo-Asian collision:tectonic transition from compression to strike slip.Acta Geologica Sinica,90(1):1~23(in Chinese with English abstract).
    Xu Zhiqin,Fu Xiaofang,Ma Xuxuan,Qi Xuexiang,Wu Chan,Hou Liwei,Zhao Zhongbao.2016b.The gneiss domes in Tibetan plateau and their potential for prospecting.Acta Geologica Sinica,90(11):2971~2981(in Chinese with English abstract).
    Yin An,Harrison T M.2000.Geologic Evolution of the Himalayan-Tibetan Orogen.Annual Review of Earth and Planetary Sciences,28(1):211~280.
    Zeitler P K,Koons P O,Bishop M P,Chamberlain C P,Craw D,Edwards M A,Hamidullah S,Jan M Q,Khan M A,KhattakM U K,Kidd W S F,Mackie R L,Meltzer A S,Pecher A,Poage M A,Sarker G,Schneider D A,Seeber L,Shroder J F.2001.Crustal reworking at Nanga Parbat,Pakistan-Metamorphic consequencese of thermal-mechanical couplingfacilitated by erosion.Tectonics,20(5):712~728.
    洪俊,计文化,张辉善,姚文光,范堡程,刘明义,罗彦军.2015.帕米尔东缘杜格里富碱斑岩锆石U-Pb定年、地球化学特征及构造意义.地质学报,89(9):1643~1654.
    侯可军,李延河,田有荣.2009.LA-MC-ICP-MS锆石微区原位U-Pb定年技术.矿床地质,28(4):481~492.
    李海兵,Valli F,许志琴,杨经绥,Tapponnier P,Lacassin R,陈松永,戚学祥,Chevalier M L.2006.喀喇昆仑断裂的变形特征及构造演化.中国地质,33(2):239~255.
    柯珊,莫宣学,罗照华,詹华明,梁涛,李莉等.2006.塔什库尔干新生代碱性杂岩的地球化学特征及岩石成因.岩石学报,22(4):905~915.
    罗照华,莫宣学,柯珊.2003.塔什库尔干碱性杂岩体形成时代及其地质意义.新疆地质,21(1):46~50.
    王建平.2008.西昆仑塔什库尔干混杂岩的地质特征及其大地构造意义.地质通报.27(12):2057~2066.
    许志琴,王勤,李忠海,李化启,蔡志慧,梁凤华,董汉文,曹汇,陈希节,黄学猛,吴婵,许翠萍.2016a.印度-亚洲碰撞:从挤压到走滑的构造转换.地质学报,90(1):1~23.
    许志琴,付小芳,马绪宣,戚学祥,吴婵,侯立伟,赵中宝.2016b.青藏高原片麻岩穹窿与找矿前景.地质学报,90(11):2971~2981.

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