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地质学报  2004 

印度大陆俯冲前缘的可能位置:来自藏南和藏东活动热泉气体He同位素约束

, PP. 482-493

Keywords: 印度大陆,俯冲前缘,热泉气体,He同位素

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Abstract:

为了获得西藏碰撞造山带的深部信息,并约束印度大陆俯冲碰撞过程,系统研究了藏南地区活动热泉的氦同位素。本文资料和前人成果表明,青藏高原热泉气体He同位素组成变化极大,R/Ra介于0.017~5.38之间,可分为两个不同的He变化域,即幔源He域(R/Ra:0.11~5.38;R为样品的3He/4He值,Ra为空气的3He/4He值,下同)和壳源He域(R/Ra:0.017~0.072)。前者主要分布于东构造结附近的腾冲热海(R/Ra:0.40~5.38)、西构造结附近的狮泉河热田(R/Ra:0.27~0.30)以及89°E以东的拉萨热水活动带(R/Ra:0.11~0.98),后者集中于89°E以西的昂仁热水活动区(R/Ra:0.017~0.072)。东西构造结附近的热泉受走滑断裂控制,有不超过50%的幔源气贡献,而高原腹地内的热水活动则受SN向裂谷控制,幔源He域与壳源He域以89°E为界,分别横跨雅江缝合带。热泉氦同位素与深部地球物理探测资料综合分析表明,高原腹地的现代热水活动主要受上地壳内部成片出现的岩浆房或部分熔融层驱动,但89°E以东地区有来自幔源熔浆的热和物质(He气)贡献。本文提出,印度大陆板块总体呈斜向俯冲态势,在89°E以西,向北北东方向缓角度俯冲的板片可能已越过雅江缝合带,而在89°E以

References

[1]  高永丰,侯增谦,魏瑞华.2003.冈底斯晚第三纪斑岩的岩石学、地球化学及其地球动力学意义.岩石学报,19(3):418~428.
[2]  侯增谦,韩发,夏林圻,张绮玲,等.2003b.现代与古代海底热水成矿作用.北京:地质出版社,1~423.
[3]  侯增谦,孟祥金,曲晓明,高永丰.2004.西藏冈底斯埃达克质斑岩铜矿带的构造控制模型.岩石学报,20(2):239~248.
[4]  侯增谦,曲晓明,王淑贤,高永丰,杜安道,黄卫.2003a.西藏高原冈底斯斑岩铜矿带辉钼矿Re-Os年龄:成矿作用时限与动力学背景应用.中国科学,33(7):609~618.
[5]  姜朝松,王韶晋,周瑞琦,等.2000.腾冲火山活动构造动力学研究.地震研究,23(2):179~187.
[6]  廖志杰,尹正武,贾希义,吕维新.1997.腾冲热海地热田的概念模型.高校地质学报,3(2):212~221.
[7]  上官志冠,白春华,孙明良.2000.腾冲热海地区现代幔源岩浆释放特征.中国科学,30:407~414.
[8]  上官志冠.1999b.腾冲火山区幔源岩浆气体上升过程中的变化及原因.地质论评,45(增刊):926-933.
[9]  沈显杰,张文仁,杨淑贞,等.1990.青藏热流与地体构造热演化.北京:地质出版社.1~90.
[10]  王先斌,徐胜,陈践发,等.1993.腾冲火山区温泉气体组分和氨同位素组成特征.科学通报,38:814~817.
[11]  赵平,多吉,梁廷立,等.1998.西藏羊八井热田气体地球化学特征.科学通报,43:691~696.
[12]  Andrews J N. 1985. The isotopic composition of radiogenic helium and its use to study groundwater movement in confined aquifers.Chem. Geology, 49: 339~350.
[13]  Coleman M, Hodges K. 1995. Evidence for Tibetan plateau uplift before 14 Myr ago from a new minimum age for east-west extension. Nature, 374: 49~52.
[14]  Coulon C, Maluski H, Bollinger C, Wang S. 1986. Mesozoic and Cenozoic volcanic rocks from central and southern Tibet: 3gAr/40 Ar dating, petrological characteristics and geodynamic significance. Earth Planet. Sci. Lett., 79: 281~302.
[15]  Ding L, Zhong D L, Yin A, Harrison T M. 2001, Cenozoic structural and metamorphic evolution of the eastern Himalayan syntaxis (Namche Barwa). Earth Planet. Sci. Lett. ,192: 423~438.
[16]  Hochstein and Yang Zhongke. 1995. The Himalayan Geothermal Belt (Kashmir, Tibet, West Yunnan). In Gupta M L and Yainano M, eds. Terrestrial Heat Flow and Geothermal Energy in Asia,331~368.
[17]  Hoke L, Hilton D, Lamb S, Hammerschmist K, Friedrichsen H.1994. 3He evidence for a wide zone of active mantle melting beneath the Central Andes. Earth Planet. Sci. Lett., 128:341~355.
[18]  Hou Zengqian, Gao Y F, Qu X M, Rui Z Y, Mo X X, Zhao Z D.2004. Origin of adakitic intrusives generated during mid-Miocene east-west extension in South Tibet. Earth Planet. Sci. Lett.,220: 139-150.
[19]  Hou Zengqian, Mo Xuanxue, Gao Yongfeng, et al. 2003c. Adakite, a possible host rock porphyry copper deposits: case studies of porphyry copper belts in Tibetan plateau and in northern Chile.Mineral deposits, 22(1): 1~12.
[20]  Hou Z Q, Meng X J, Qu X M, Gao Y F. 2004. Genesis of adakitic porphyry and tectonic controls on the Gangdese Miocene porphyry copper belt in the Tibetan orogen. Acta Petrologica Sinica, 20(2): 239~248.
[21]  King R, Ni J, Zhao W J, et al. 1996. Electronically conductive crust in Southern Tibet from INDEPTH magnetotelluric surveying.Science, 274: 1694~1696.
[22]  Kosarev G, King R, Sobolev S V, Yuan X, Hanks W, Oreshin S.1999. Seismic evidence for a detached Indian lithospheric mantle beneath Tibet. Science, 283: 1306~1309.
[23]  Liao Zhijie, Yin Zhenwu, Jia Xiyi, Lu Weixin. 1997. Conceptual model of the Rehai (hot sea) geothermal field in Tengchong,Yunnan province, China. Geological Journal of China Universities, 3(2): 212~221.
[24]  Makovsky Y and Klemperer S L. 1999. Measuring the seismic properties of Tibetan bright spots: evidence for free aqueous fluids in the Tibetan middle crust. J. Geophys. Res. , 104: 10795~10825.
[25]  Molnar P and Tapponnier P. 1978. Active tectonics of Tibet. J Geophys Res, 83: 5361~5375.
[26]  Nelson K D, Zhao W J, Brown L D, et al. 1996. Parially molten middle crust beneath Southern Tibet: synthesis of Project INDEPTH results. Science, 274: 1684~1688.
[27]  O\'Nions R K, Tolstiklin I N. 1994. Behavior and residence times of lithophile and rare gas tracers in the upper mantle. Earth Planet.Sci. Lett. , 124: 131~138.
[28]  Schares E, Xu R H, Allegere C J. 1984. U-Pb geochronology of the Gangdese (Transhimalaya) plutonism in the Lhasa-Xizang region, Tibet. Earth Planet. Sci. Lett., 69: 311~320.
[29]  Shangguan Zhiguan. 1999b. Variations of chemical compositions of mantle-derived magmatic gases and the origin during their ascent towards the surface in the Tengchong volcanic area. Geological Review, 45 (sup.): 926~933.
[30]  Shangguan Zhiguan. Sun Mingliang, Li Hengzhong. 1999a. Active types of modern geothermal fluids at the Tengchong region,Yunnan province. Seismology and Geology, 21(4): 434~442.
[31]  Turner S, Hawkesworth G, Liu J, Rogers N, Kelley S, Calsteren P V. 1993. Timing of Tibetan uplift constrained by analysis of volcanic rocks. Nature, 364: 50~54.
[32]  Williams H, Turner S, Kelley S, Harris N. 2001. Age and composition of dikes in Southern Tibet: new constraints on the timing of east-wesf extension and It\'s relationship to postcollisional volcanism. Geology, 29 : 339~342.
[33]  Xu S, Nakai S, Waikita H, Wang X B, Chen J. 1994. Helium isotopic compositions of the Quaternary volcanic geothermal area near Indo-Euresian eollisional margin at Tengchong, China. In Matsuda (eds.). Novel Gas Geochemistry and Cosmochemistry.Tokyo : Terra Scientific Publishing Company, 305~313.
[34]  Yokoyama T, Nakai S, Waikita H. 1999. Helium and carbon isotopic compositions of hot spring gases in the Tibetan plateau. J.Volcan. Geotherm. Res. , 88: 99~107.
[35]  Zhao W J, Nelson K D and Poject INDEPTH team. 1993. Deep seismic reflection evidence for continental underthrusting beneath the south Tibet. Nature, 366: 557~559.
[36]  Zhou Zhenheng, Xiang Caiying, Yang Meilin. 2000. isotope geochemistry for volcanic rock in Tengchong. 23: 194~200.
[37]  侯增谦,李振清,曲晓明,等.2001.0.5Ma以来的青藏高原隆升过程:来自冈底斯带热水活动的证据.中国科学,31:27~33.
[38]  侯增谦,莫宣学,高永丰,等.2003c.埃达克岩:斑岩铜矿的重要含矿母岩-以西藏和智利斑岩铜矿为例.矿床地质,22(1):1~12.
[39]  廖志杰,沈敏子,过帼颖.1991.云南腾冲热海热田的热储特征.地质学报,65(1):73-85.
[40]  穆治国,等.1987.腾冲火山活动的时代与岩浆源的来源问题.地球物理学报,30(3):261~270.
[41]  上官志冠,孙明良,李恒忠.1999a.云南腾冲热海地区现代地热流体活动类型.地震地质,21(4):434~442.
[42]  上官志冠.2000.腾冲热海地热田热储结构与岩浆热源的温度.岩石学报,16(1):83~90.
[43]  王椿庸,楼海,吴建平,等.2002.腾冲火山地热区地壳结构的地震学研究.地震学报,24(3):230~240.
[44]  王瑜.1999.西藏及腾冲地区晚新生代火山作用的构造背景.地质论评,45(增刊):905-913.
[45]  周真恒,向才英,杨梅林.2000.腾冲火山岩同位素地球化学研究.地震研究,23:194~200.
[46]  朱炳泉,毛存孝.1983.印度-欧亚板块东部碰撞边界:腾冲火山岩Nd-Sr同位素与微量元素研究.地球化学,1:1~14.
[47]  Bllsnluk P M, Hacker B, Glodny J, Ratschbacher L, Bill S, Wu Z H,McWilliams M O, Calvert A. 2001. Normal faulting in central Tibet since at least 13.5 Myr ago. Nature, 412: 628~632.
[48]  Brown L D, Zhao W J, Nelson K D, et al. 1996. Bright spots,structure, and magmatism in Southern Tibet from INDEPTH serimic reflection profiling. Science, 274: 1688~1690.
[49]  Copeland P H, Harrison T M, Kidd W S F, Xu R H, Zhang Y Q.1987. Rapid early Miocene acceleration of uplift in the Gangdese belt, Xizang (southern Tibet) and its bearing on accommondation mechanism of the India-Asia collision. Earth Planet. Sci.Lett. , 86: 240~252.
[50]  Craig H, Lupton J E, Horibe Y. 1978. A mantle helium component in Circum-Pacific volcanic gases: Hakone, the Marianas, and Mt.Lassen. In: Alexander E C, Ozima M. (eds.). Terrestrial Rare Gas, Central Academic Publications, Japan: 3~16.
[51]  Gao Y F, Hou Z Q and Weo R H. 2003. Neogene porphyries from Gangdese : petrological, geochemical, characteristics and geodynamic significances. Acta Petrologica Sinica, 19(3): 418~428.
[52]  Hoke L, Lamb S, Hilton D, Poreda R J. 2000. Southern limit of mantle-derived geothermal helium emissions in Tibet: implications for lithoshperic structure. Earth Planet. Sci. Lett., 180: 297~308.
[53]  Hou Zengqian, Li Zhenqing, Qu Xiaoming, et al. 2001. The Uplifting Processes of the Tibetan Plateau since 0. 5Ma B. P. : Evidences from Hydrothermal Activity in the Gangdise Belt. Since in China (Series D), 44 (supp.): 35~44.
[54]  Hou Zengqian, Qu Xiaoming, Wang Shuxian, Gao Yongfeng, Du Andao and Huang Wei. 2004. Re-Os age of porphyry copper deposits and associated NS-striking normal faulting system on the Tibet from molybdenites.. Since in China (Series D), 47: 609~618.
[55]  Jiang Chaosong, Wang Shaojin, Zhou Ruiqi, et al. 2000. Dynamics study of tectonics on Tengchong volcano activity. Journal of Seimological Research, 23 (2): 179~187.
[56]  Liao Zhijie, Shen Minzi, Guo Guoying. 1991. Characteristic of the geothermal reservoir in the Rehai (hot sea) field in Tengchong county, Yunnan province. Acta Geologica Sinica, 65 (1): 73~85.
[57]  Maheo G, Guillot S, Blichert-Tofa J, Rolland Y, Pecher A. 2002. A slab breakoff model for the Neogene thermal evolution of Southern Karakorum and South Tibet. Earth Planet. Sci. lett., 195:45~58.
[58]  Miller C, Schuster R, Klotzli U, Frank W, Purtscher F. 1999. Postcollisional potassic and ultrapotassic magmatism in SW Tibet:geochemical and Sr-Nd-Pb-O isotopic constraints for mantle source characteristics and petrogenesis. J. petrol. , 40: 1399~1424.
[59]  Mu Zhiguo. 1987. Times of volcanic activity and origin of magma in Tengchong geothermal area, west Yunnan provine. Acta Geophysics Sinica, 30(3): 261~270.
[60]  Ni J, York J. 1978. Late Cenozoic tectonics of the Tibetan plateau. J Geophys Res, 83: 5377~5384.
[61]  Powell C M, Conaghan P J. 1973. Plate tectonics and the Himalayas.Earth Planet. Sci. Lett., 20: 1~12.
[62]  Scheling D, Arita K. 1991. Thrust tectonics, crustal shorting, and the structure of the far-eastern Napal Himalaya. Tectonics, 10:851~862.
[63]  Shangguan Zhiguan. 2000. Structure of geothermal reservoirs and the temperature of mantle-derived magma hot source in the Rehai area, Tengchong. Acta Petrologica Sinica, 16(1): 83~90.
[64]  Tapponnier P and Molnar P. 1977. Active faulting and tectonics of China. J. Geophys. Res. , 82: 2905~2930.
[65]  Wang Chunyong, Lou Hai, Wu Jianping, et al. 2002. Seismological study on the crustal structure of Tengchong volcano-geothermal area. Acta Seismologica Sinica, 24(3): 230~240.
[66]  Wang Yu. 1999. Tectonic setting of late Cenozoic volcanism in Tibet and Tengchong area. Geological Revies, 45 (supp.): 905~913.
[67]  Wittlinger G. 1996. Seismic tomography of northern Tibet and Kunlun: evidence for crustal blocks and mantle velocity contrasts.Earth Planet. Sci. Lett. , 139: 263~279.
[68]  Yin A, Harrison T M. 2000. Geologic evolution of the HimalayanTibetan orogen. J. Ann. Rev. Earth Planet. Sci., 28:211~280.
[69]  Zhu Bingquan, Mao Cunxiao. 1983. Nd-Sr isotope and trace element study on Tengchong volcanic rocks from the Indo-Eurasian collisional margin. Geochimica, (1) : 1~14.

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