SHRIMP age and geochemistry of the Bikou volcanic terrane: Implications for Neoproterozoic tectonics on the northern margin of the Yangtze Craton
文献类型：期刊论文
| 作者 | Yan, QR; Wang, ZQ; Hanson, AD; Druschke, PA; Yan, Z; Liu, DY; Jian, P; Song, B; Wang, T; Jiang, CF |
| 刊名 | ACTA GEOLOGICA SINICA-ENGLISH EDITION
 |
| 出版日期 | 2003-12-01 |
| 卷号 | 77期号:4页码:479-490 |
| 关键词 | geochemistry Sr-Nd-Pb isotopes SHRIMP ages Bikou volcanic terrane southwestern Qinling Mts Yangtze Craton Rodinia |
| ISSN号 | 1000-9515 |
| 文献子类 | Article |
| 英文摘要 | The Bikou volcanic terrane is predominated by subalkaline tholeiitic lavas. Rock samples display lower initial ratios of Sr and Nd, 0.701248-0.704413 and 0.511080-0.512341 respectively. Pb-207 and Pb-208 are significantly enriched in the lavas. Most samples have positive epsilon(Nd), which indicates that the magma was derived from EM-type mantle source, while a few samples with negative epsilon(Nd) indicate that there was contamination in the magma evolution. Magma differentiation is demonstrated by variations of LREE and LILE from depletion to enrichment. Additionally, normalized. REE patterns and trace elements showed that lavas from the Bikou volcanic terrane have similar characteristics to those of basalts in arc settings caused by subduction and collision. Analyses showed that the Bikou volcanic terrane is a volcanic arc. New evidence proved that the Hengdan Group, north of the Bikou arc, is a turbidite terrane filling a forearc basin. Consequently, the Bikou volcanic terrane and the Hengdan turbidite terrane construct an arc-basin system. New SHRIMP ages showed that this arc-basin system developed on the northern margin of the Yangtze craton in the Neoproterozoic (846-776 Ma), and this arc-basin system is in agreement with the tectonic processes of Rodinia in the Neoproterzoic. |
| WOS关键词 | PALEOMAGNETIC CONSTRAINTS ; SOUTH CHINA ; LAURENTIA ; RODINIA ; BREAKUP ; PB ; AUSTRALIA ; GRADE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000188701400007 |
| 出版者 | GEOLOGICAL SOC CHINA |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78781]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yan, QR |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, QR,Wang, ZQ,Hanson, AD,et al. SHRIMP age and geochemistry of the Bikou volcanic terrane: Implications for Neoproterozoic tectonics on the northern margin of the Yangtze Craton[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2003,77(4):479-490. |
| APA | Yan, QR.,Wang, ZQ.,Hanson, AD.,Druschke, PA.,Yan, Z.,...&Jiang, CF.(2003).SHRIMP age and geochemistry of the Bikou volcanic terrane: Implications for Neoproterozoic tectonics on the northern margin of the Yangtze Craton.ACTA GEOLOGICA SINICA-ENGLISH EDITION,77(4),479-490. |
| MLA | Yan, QR,et al."SHRIMP age and geochemistry of the Bikou volcanic terrane: Implications for Neoproterozoic tectonics on the northern margin of the Yangtze Craton".ACTA GEOLOGICA SINICA-ENGLISH EDITION 77.4(2003):479-490. |
入库方式： OAI收割
来源：地质与地球物理研究所
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