藏南林周盆地林子宗火山岩的时代、成因及其地质意义：锆石U-Pb年龄和Hf同位素证据

李皓揚 锺孙霖 王彦斌 朱弟成 杨进辉 宋彪 刘敦一 吴福元

藏南林周盆地林子宗火山岩的时代、成因及其地质意义：锆石U-Pb年龄和Hf同位素证据

李皓揚锺孙霖王彦斌朱弟成杨进辉宋彪刘敦一吴福元

- [1]台湾大学地质科学系,台北 [2]中国地质科学院地质研究所,北京,100037 [3]成都地质矿产研究所,成都,610081 [4]中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京,100029
基金项目:
本研究由台湾国科会与台湾大学地质科学系地球化学实验室资助.致谢本研究的野外工作蒙江万博士指点,特此致谢;实验过程先后得到陶华、谢烈文、梁育碹、邱瀚毅及朱秋红等协助,朱美妃博士提供藏南花冈岩Hf同位素资料参考,在此一并感谢.

修回日期: 2006-11-06

刊出日期: 2007-02-28

Age, petrogenesis and geological significance of the Linzizong volcanic successions in the Linzhou basin, southern Tibet: Evidence from zircon U-Pb dates and Hf isotopes

- 1.Department of Geosciences, National Taiwan University, Taipei, China;2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100039, China;3. Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, China;4. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Revised Date: 06 November 2006

Publish Date: 28 February 2007

摘要

摘要: 本文对林子宗火山岩命名地-林周盆地内典中组最底部的英安质火山角砾岩和年波组下段的流纹质熔结凝灰岩进行了锆石U-Pb年代学和Hf同位素分析,结果显示前者形成于62.5±1.1 Ma,而后者形成于56.4±1.2 Ma,表明林子宗火山活动的起始时间略晚于K/T界限年龄.岩浆锆石的εHf（T）值分别为＋9.0～＋0.5和＋11.0～＋4.8,显示亏损地幔的特征,与同时期冈底斯岩体的岩浆锆石相似,应为同源产物,源自于地幔楔的部分熔融.此外,典中组样品含有石炭纪年龄的捕获锆石,它们的εHf（T）值介于-0.6～-3.2之间,具有中元古代的Hf同位素模式年龄,与附近念青唐古拉岩带花冈岩的捕获锆石相若,暗示拉萨陆块老地壳的混染在岩浆演化中亦扮演了角色.结合区域地质,我们认为在藏南拉萨陆块上的林子宗火山岩是印度与欧亚大陆碰撞之前到碰撞初期新特提斯海洋板块向北俯冲、拆离作用的结果.
- 林子宗火山岩 /
- 林周盆地 /
- 西藏 /
- 锆告 /
- U-Pb年代学 /
- Hf同位素
- Linzizong volcanic successions /
- Linzhou basin /
- Tibet /
- Zircon /
- U-Pb dating /
- Hf isotope

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参考文献(37)

[1]	Beloisova BA,Griffin WL and O\' Reilly SY.2006. Zircon crystal morphology,trace element signatures and Hf Isotope composition as a tool for petrogenetic modelling:Examples from Eastern Australian granitoids.Journal of Petrology,47:329-353
[2]	Chu MF.2006. Application of ICP-MS to the study of Transhimalayan petrogenesis.Ph.D.Dissertation,Department of Geosciences,National Taiwan University,259 pp
[3]	Chu MF,Chung SL,Song B,Liu D,O\' Reilly SY,Pearson NJ,Ji J and Wen DJ.2006. Zircon U-Pb and Hf isotope constraints on the Mesozoic tectonics and crustal evolution of southern Tibet.Geology,34:745-748
[4]	Chung SL,Chu MF,Zhang Y,Xie Y,Lo CH,Lee TY,Lan CY,Li X,Zhang Q and Wang Y.2005. Tibetan tectonic evolution inferred from spatial and temporal variations in post-collisional magmatism.Earth-Science Reviews,68:173-196
[5]	Coulon C,Maluski H,Bollinges C and Wang S.1986. Mesozoic and Cenozoic volcanic rocks from central and southern Tibet:39 Ar-40 Ar dating,petrological characteristics and geodynamical significance.Earth and Planetary Science Letters,79:281 -302
[6]	Davies JH and yon Blanckenburg F.1995. Slab breakoff:A model of lithosphere detachment and its test in the magmatism and deformation of collisional orogens.Earth and Planetary Science Letters,129:85-102
[7]	Dong G,Mo X,Zhao Z,Wang L and Zhou S.2005. A new understanding of the stratigraphic successions of the Linzizong volcanic rocks in the Linzhou basin,northern Lhasa,Tibet,China.Geological Bulletin of China,24:549-557
[8]	Gradstein FM,Ogg JG and Smith AG.2004. A Geologic Time Scale 2004. Cambridge University Press,Cambridge,U.K.,384 pp
[9]	Griffin WL,Wang X,Jackson SE,Pearson NJ,O\' Reilly SY,Xu X and Zhou X.2002. Zircon chemistry and magma mixing,SE China:Insitu analysis of Hf isotopes,Tonglu and Pingtan igneous complexes.Lithos,61:237-269
[10]	Lee HY,Chung SL,Wen DJ,Lo CH,Ji J,Qian Q and Lee TY.2004. New age and geochemical constraints for the origin of the Linzizong volcanic successions,southern Tibet.Eos Trans.AGU,Western Pacific Geophysics Meeting Abstracts,Honolulu,164 p
[11]	Lee HY.2006. The Linzizong volcanic successions,southern Tibet:Ages,geochemical characteristics and geodynamic significance.P.h.D.Dissertation,Department of Geosciences,National Taiwan University (Manuscript).
[12]	Lee HY,Chung SL,Lo CH,Ji J,Wen DJ,Qian Q,Lee TY and Zhang Q.2006. On the age and geodynamic significance of the Linzizong volcanic successions,southern Tibet:Neo-Tethyan slab breakoff in the early stage of the India-Asia collision.(submitted)
[13]	Liu H.1993. Division of Linzizong volcanic series and its geochronology in Lhasa area.Xizang Geology,2:59 -69
[14]	Mo XX,Zhao ZD,Deng JF,Dong GC,Zhou S,Gao TY,Zhang SQ and Wang LL.2003. Response of volcanism to the India-Asia collision.Earth Science Frontiers,10:135-148
[15]	Pan GT,Ding J,Yao DS and Wang LQ.2004. Guidebook of 1:1,500,000 geologic map of the Qinghai-Xizang (Tibet) plateau and adjacent area.Chengdu,China,Chengdu Cartographic Publishing House
[16]	Pearce JA and Mei H.1988. Volcanic rocks of the 1985 Tibet Geotraverse:Lhasa to Golmud.Philosophical Transactions of the Royal Society of London,A327:169 -201
[17]	Song B,Zhang YH,Wan YS and Jian P.2002,Mount making and procedure of the SHRIMP dating.Geological Review,48Supplement):26 -30
[18]	van de Zedde DMA and Wortel MJR.2001. Shallow slab detachment as a transient source of heat at midlithospheric depths.Tectonics,20:868-882
[19]	Wu FY,Yang YH,Xie LW,Yang JH and Xu P.2006. Hf isotopic compositions of the standard zircons and baddeleyites used in U-Pb geochronology.Chemical Geology,234:105-126
[20]	Xu P,Wu FY,Xie LW and Yang YH.2004. Hf isotopic compositions of the standard zircons for U-Pb dating.Chinese Science Bulletin,49:1403-1410
[21]	Yang JH,Wu FY,Chung SL,Wilde SA and Chu MF.2006a.A hybrid origin for the Qianshan A-type granite,northeast China:Geochemical and Sr-Nd-Hf isotopic evidence.Lithos,89:89 -106
[22]	Yang JH,Wu FY,Wilde SA,Xie LW,Yang YH and Liu XM.2006b.Trace magma mixing in granite genesis:in-situ U-Pb dating and Hfisotope analysis of zircons.Contributions to Mineralogy and Petrology,in press.DOI 10.1007/s00410-006 -0139 -7
[23]	Yin A and Harrison TM.2000. Geologic evolution of the Himalayan-Tibetan orogen.Annual Review of Earth and Planetary Sciences,28:211 -280
[24]	ZhoS,Mo X,Dong G,Zhao Z,Qiu R,Wang Land Guo T.2004.40Ar-39Ar geochronology of Cenozoic Linzizong volcanic rocks from Linzhou basin,Tibet.Chinese Science Bulletin,49:2095 -2103
[25]	Zhu DC,Pan GT,Chung SL,Mo XX,Zhao ZD,Liao ZL,Wang LQ,Li GM and Dong GC.2006. SHRIMP zircon age and geochemical constraints on the origin of early Jurassic volcanic rocks from the Yeba Formation,southern Gangdese in south Tibet.(submitted)
[26]	Zbu DC,Pan GT,Mo XX,Wang LQ,Liao ZL,Zhao ZD,Dong GC and Zhou CY.2006. Late Jurassic-Early Cretaceous geodynamic setting in meddle-northern Gangdese:New insights from volcanic rocks.Acta Petrologica Sinica,22:534 -546
[27]	刘鸿飞.1993.拉萨地区林子宗火山岩系的划分和时代归属.西藏地质,2:59-69
[28]	西藏自治区地质矿产局.1993.西藏自治区区域地质志.北京:地质出版社
[29]	朱弟成,潘桂棠,莫宣学,王立全,廖忠礼,赵志丹,董国臣,周长勇.2006.冈底斯中北部晚侏罗世-早白垩世地球动力学环境:火山岩约束.岩石学报,22:534-546
[30]	朱美妃.2006.电浆质谱术在西藏南部火成岩岩石成因上的应用.台湾大学地质科学研究所博士论文,共259页
[31]	宋彪,张玉海,万渝生,简平.2002.锆石SHRIMP样品靶制作、年龄测定及有关现象讨论地质论评,48(增刊):26-30
[32]	李皓扬.2006.藏南林子宗火山岩的年代学、地球化学和地体构造意义.台湾大学地质科学研究所博士论文(稿)
[33]	周肃,莫宣学,董国臣,赵志丹,邱瑞照,王亮亮,郭铁鹰.2004.西藏林周盆地林子宗火山岩Ar/39Ar年代格架.科学通报,49:2095-2103
[34]	徐平,吴福元,谢烈文,杨岳衡.2004. U-Pb同位素定年标准锆石的Hf同位素.科学通报,49:1403-1410
[35]	莫宣学,赵志丹,邓晋福,董国臣,周肃,郭铁鹰,张双全,王亮亮.2003.印度-亚洲大陆主碰撞过程的火山作用响应.地学前缘,10:135-148
[36]	董国臣,莫宣学,赵志丹,王亮亮,周肃.2005.拉萨北部林周盆地林子宗火山岩层序新议.地质通报,24:549-557
[37]	潘桂棠,丁俊,姚东生,王立全等.2004.1:1,500,000青藏高原及邻区地质图说明书.成都地图出版社

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藏南林周盆地林子宗火山岩的时代、成因及其地质意义：锆石U-Pb年龄和Hf同位素证据

Age, petrogenesis and geological significance of the Linzizong volcanic successions in the Linzhou basin, southern Tibet: Evidence from zircon U-Pb dates and Hf isotopes

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