Igneous rocks geochemistry, zircon U-Pb age and its geological significance in the central section of Xiemisitai area, Xinjiang
文献类型：期刊论文
| 作者 | Meng Lei1,2; Shen Ping1; Shen YuanChao1; Liu TieBing1; Song GuoXue1; Dai HuaWu1; Li ChengKai2; Lang ZeSong2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2010-10-01 |
| 卷号 | 26期号:10页码:3047-3056 |
| 关键词 | Igneous rocks Geochemistry SIMS zircon U-Pb date Island arc the central section of the Xiemisitai |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The igneous rocks, occurred in the central section of the Xiemisitai area in Xinjiang, are made of the andesite, dacite and rhyolite. Geochemical data indicate that the igneous rocks have a high-K calc-alkaline composition (K2O = 3. 42% similar to 9. 85%; Na2O =0.48% similar to -5.30%), and are enriched in large ion lithophile elements (LILE) and depleted in high field strength elements (HFSE) with a clear negative Nb, P and Ti anomaly. REE patterns show distinct enrichments in LREE relative to HREE. Lead isotope composition of the rocks span a narrow range (Pb-206/Pb-204 =18. 435 similar to 19. 409, (207)pb/Pb-204 = 15. 535 similar to 15. 602, Pb-208/Pb-204 = 38.361 similar to 39.213). The rocks also exhibit high initial epsilon(Nd)(t) (+ 4. 43 similar to + 6.65) ratios and low initial Sr-87/Sr-86 values (0.700953 similar to 0. 704435). Volcanic activity occurred at 422.5 +/- 1. 9Ma based on U-Pb (SIMS) analyses of zircons from the rhyolite. These data are consistent with a mature arc and suggest that the volcanic rocks were derived from the partial melting of multiple sources including oceanic crust and enriched mantle, with melts undergoing significant crystal fractionation and minor crustal assimilation during convergence between the paleo-Junggar ocean and the Xiemisitai mature arc in Late Silurian. |
| WOS关键词 | TECTONIC EVOLUTION ; NORTHERN XINJIANG ; NW CHINA ; OPHIOLITIC MELANGE ; TRACE-ELEMENT ; WEST JUNGGAR ; ISOTOPE ; ND ; MINERALIZATION ; GEOCHRONOLOGY |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000284450800016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/72156]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Meng Lei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.China Nonferrous Met Resource Geol Survey, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng Lei,Shen Ping,Shen YuanChao,et al. Igneous rocks geochemistry, zircon U-Pb age and its geological significance in the central section of Xiemisitai area, Xinjiang[J]. ACTA PETROLOGICA SINICA,2010,26(10):3047-3056. |
| APA | Meng Lei.,Shen Ping.,Shen YuanChao.,Liu TieBing.,Song GuoXue.,...&Lang ZeSong.(2010).Igneous rocks geochemistry, zircon U-Pb age and its geological significance in the central section of Xiemisitai area, Xinjiang.ACTA PETROLOGICA SINICA,26(10),3047-3056. |
| MLA | Meng Lei,et al."Igneous rocks geochemistry, zircon U-Pb age and its geological significance in the central section of Xiemisitai area, Xinjiang".ACTA PETROLOGICA SINICA 26.10(2010):3047-3056. |
入库方式： OAI收割
来源：地质与地球物理研究所
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