Discovery of the Neoproterozoic magmatics in southeastern Yunnan: Evidence from SHRIMP zircon U-Pb dating and lithogeochemistry.
文献类型：期刊论文
| 作者 | Liu YuPing; Ye Lin; Li ChaoYang; Song Biao; Li TieSheng; Guo LiGuo; Pi DaoHui |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2006-04-01 |
| 卷号 | 22期号:4页码:916-926 |
| 关键词 | Neoproterozoic magmatism SHRIMP zircon U-Pb dating geochemistry southeastern Yunnan |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The region includes southeastern Yunnan and North Vietnam, which locates among the Nanhua, Yangtze and Indio-China Blocks, is a key target to study the tectonic evolution of South China and Southeastern Asian. There is a deformed-metamorphic dome outcrops in the Laojunshana area, Southeastern Yunnan. It had been divided into the Later Silurian Nanwenhe granite, the Neoproterozoic Xinzhai Formation and the Paleoproterozoic Mengdong Group in the recently 1150000 regional geological surveys. The SHRIMP zircon U-Pb dating have been done first on the quartz-hornblende-plagiogneiss from the Mengdong Group, and the ages of two magmatic zircon groups are 761 +/- 12Ma (N = 11, MSWD = 0.85) and 829 +/- 10Ma(N = 10, MSWD = 0. 36), respectively. Combined with the crystal features, CL images, concordant of U-Th-Pb ages ( the D% are 2.6 and 4.8, respectively) and the correlation index (0. 64 and 0. 19, respectively), 761 12Ma should present the crystal age, and 829 10Ma should presented the age of an older magmatism. These ages suggested that there should have the Neoproterozoic magmatism in the area, and the Mengdong Group should be a Precambrian metamorphic sedimentary and magmatic complex. Besides these, the inherited zircons with approximate to 1.83 Ga U-Pb dating indicated that there should have the paleo-proterozoic basement rocks in this area. The coexist quartz-plagio-amphibolite have rare-earth element and trace element distribution characteristic of 0113, and the quartz-hornblende-plagiogneiss have similar geochemistry characteristics beside low TiO(2), P(2)O(5), K(2)O, Rb, Sr, Eu contents and moderate Nb-Ta negative anomaly, which should be attributed to crystal fraction and crust-contaminate. The geochemistry and tectonic setting identification of these samples suggested that their protolith should be basaltic to basaltic-andesitic magmatic series related to mantle-plume. Based on these mention above, the Laojunshan area, Southeastern Yunnan should located in the cross region of the Nanhua Rift and the Kangdian Rift during breaking-up of the Rodinian Super-continent in the Neoproterozoic. |
| WOS关键词 | LOWER BOUNDARY AGE ; SOUTH CHINA ; NORTHERN VIETNAM ; VOLCANIC-ROCKS ; TECTONIC EVOLUTION ; YANGTZE CRATON ; BREAK-UP ; RODINIA ; SUPERCONTINENT ; GEOCHRONOLOGY |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000238367700015 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/66930]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu YuPing |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Ore Deposit Geochem Key Lab, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Inst Guangzhou Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu YuPing,Ye Lin,Li ChaoYang,et al. Discovery of the Neoproterozoic magmatics in southeastern Yunnan: Evidence from SHRIMP zircon U-Pb dating and lithogeochemistry.[J]. ACTA PETROLOGICA SINICA,2006,22(4):916-926. |
| APA | Liu YuPing.,Ye Lin.,Li ChaoYang.,Song Biao.,Li TieSheng.,...&Pi DaoHui.(2006).Discovery of the Neoproterozoic magmatics in southeastern Yunnan: Evidence from SHRIMP zircon U-Pb dating and lithogeochemistry..ACTA PETROLOGICA SINICA,22(4),916-926. |
| MLA | Liu YuPing,et al."Discovery of the Neoproterozoic magmatics in southeastern Yunnan: Evidence from SHRIMP zircon U-Pb dating and lithogeochemistry.".ACTA PETROLOGICA SINICA 22.4(2006):916-926. |
入库方式： OAI收割
来源：地质与地球物理研究所
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