| LA-ICPMS U-Pb Ages of Zircon from Metaleucosomes, Olongbuluke Microcontinent, North Qaidam, and Implications on the Response to the Global Rodinia Supercontinent Assembly Event in NW China |
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| 作者姓名： | 王树庆 李晓彦 陈能松 王新宇[ ] 王勤燕 柳小明 |
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| 作者单位： | Faculty of Earth Sciences China University of Geosciences，Faculty of Earth Sciences China University of Geosciences，Faculty of Earth Sciences China University of Geosciences，Faculty of Earth Sciences China University of Geosciences Geological Survey of Guangxi Nanning 530023 China，Faculty of Earth Sciences China University of Geosciences，Key Laboratory of Continental Geodynamics Ministry of Education，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China，Wuhan 430074 China，Xi'an 710069 China |
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| 基金项目： | The paper is supported by Key Project ( No .104039) and Special Doc-toral Project (No .20050491506) from the Ministry of Education , China ,the Open Research Program of the Key Laboratory of Continental Dynamics , Northwest University ,and NSFC Special Grant for National Education Base of Geology (No .J0530147) . |
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| 摘 要： | INTRODUCTION The Olongbuluke microcontinent , which wasdisintegratedfromthe northern margin of the Qaidamblock (Lu,2002) ,is composed of a two-fold base-ment with cover strata . The lower basement is themedium- to high-grade Delingha complex and theDakendaban Group, and the upper is the low-gradeWandonggou Group. The Wandonggou Group of theupper basement experienced a Late Mesoproterozoicmetamorphic event (see Yu et al .,1994) ,consistentwith the early isotopic geochronological respo…
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| 关 键 词： | 锆石 微大陆 变质作用 U-Pb期 |
| 收稿时间： | 04 5 2006 12:00AM |
| 修稿时间： | 06 25 2006 12:00AM |
LA-ICPMS U-Pb Ages of Zircon from Metaleucosomes, Olongbuluke Microcontinent,North Qaidam, and Implications on the Response to the Global Rodinia Supercontinent Assembly Event in NW China |
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| Wang Shuqing,Li Xiaoyan,Chen Nengsong,Wang Xinyu,Wang Qinyan,Liu Xiaoming.LA-ICPMS U-Pb Ages of Zircon from Metaleucosomes, Olongbuluke Microcontinent, North Qaidam, and Implications on the Response to the Global Rodinia Supercontinent Assembly Event in NW China[J].Journal of China University of Geosciences,2006,17(3):238-245. |
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| Authors: | Wang Shuqing Li Xiaoyan Chen Nengsong Wang Xinyu Wang Qinyan Liu Xiaoming |
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| Institution: | 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;2. State Key Laboratory of Continental Tectonics and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;3. GeoZentrum Nordbayern, Universität Erlangen, Schlossgarten 5a, 91054 Erlangen, Germany;4. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China;1. MOE key Laboratory of Orogenic Belt and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China;2. Institute of Earth Science and State Key Laboratory of Geological Processes and Mineral Resources, Chinese University of Geosciences, Beijing 100083, China;3. Department of Earth Sciences, Durham University, Durham DH1 3LE, UK;4. Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China;1. Department of Earth Sciences, Durham University, Durham DH1 3LE, UK;2. School of Earth Science and Mineral Resources, China University of Geosciences, Beijing 100083, China;3. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;1. Department of Earth Sciences, University of Hong Kong, Pokfulam Road, Hong Kong;2. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Northern Taibai Str. 229, Xi''an 710069, China;3. Guangdong Provincal Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275, China;4. Key Laboratory of Orogenic Belt and Crust Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China;5. Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China |
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| Abstract: | U-Pb dating was conducted on different domains of zircons from metamorphosed leucosomes in Delingha (德令哈) complex, the lower basement rocks of the Olongbuluke (欧龙布鲁克) microcontinent, North Qaidam, in order to review its complex tectonothermal history. The zircon core is comprised of highly-modified magmatic zircon relicts, the zircon mantle was produced in response to anatexis of a Late Protoproterozoic thermal event; age and isotopic composition of both the zircon core and the zircon mantle have been seriously disturbed due to the thermal event related with growth of the zircon overgrowth rim. The 207 Pb/206 Pb apparent age of the overgrowth rim was estimated to be ～ 1 030 Ma. This Late Mesoproterozoic thermal event has been interpreted as a response to the global Rodinia supercontinent assembly event in the Olongbuluke microcontinent,Northwest China. |
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| Keywords: | zircon overgrowth U-Pb age metamorphosed leucosome Rodinia supercontinent assembly northwest Qaidam |
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