Geochemistry of Permian bimodal volcanic rocks from central inner Mongolia, North China: Implication for tectonic setting and Phanerozoic continental growth in Central Asian Orogenic Belt
文献类型：期刊论文
| 作者 | Zhang, XiaoHui1,2; Zhang, Hongfu1; Tang, Yanjie1; Wilde, Simon A.2; Hu, Zhaochu3 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2008-04-15 |
| 卷号 | 249期号:3-4页码:262-281 |
| 关键词 | Early Permian bimodal volcanic rocks geochemistry petrogenesis tectonic setting continental growth Central Asian Orogenic Belts |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2008.01.005 |
| 文献子类 | Review |
| 英文摘要 | Zircon U-Pb ages, geochemical and Sr-Nd-Pb isotopic data are presented for the late Paleozoic volcanic rocks from Xilinhot in central Inner Mongolia, North China. The Xilinhot volcanic rocks show a bimodal distribution in composition, with dominant rhyolite and dacite, subordinate basalt and local andesite. New SHRIMP and LA-ICPMS zircon U-Pb isotopic data constrain their magmatic emplacement at ca. 280 Ma. The mafic samples are characterized by high abundances in Th, U and Pb, slightly enriched LREE patterns and low HFS/LREE ratios. These features, together with their OIB-like isotopic signature ((87)Sr/(86)Sr((t))approximate to 0.704 to 0.705, epsilon(Nd)(t) approximate to +6.87 to +7.90, ((206)Pb/(204)Pb)(i) approximate to 18.30 to 19.06), indicate that they were likely derived from high percentage partial melting of a subduction-related metasomatized asthenospheric mantle in the spinel facies field at depths shallower than 60-70 km. The felsic rocks show an A-type affinity, with typical enrichment in alkalis, Ga, Zr, Nb, Ce, Y, and depletion in Sr, P, Eu, and Ti, and fractionated REE patterns with very strong negative Eu anomalies. Combined with their moderately positive epsilon(Nd) (t) values (+1.85-+3.60), they are inferred to be generated by the mixing between partial melts of a newly underplated lower crustal source and an ancient felsic crustal source. The typical magma progression starting with asthenospheric melts then proceeding to lithospheric melts indicates that Early Permian magmatisin in central Inner Mongolia occurred in an extensional setting, most probably related to the post-collisional delarnination. Therefore, the occurrence of this unique bimodal magmatism, not only demonstrates that the Solonker zone experienced final amalgamation of arc-related terranes by the late-Carboniferous, but also indicates that significant vertical continental growth of crustal continuum through repeated magmatic underplating occurred in the continental interior during post-collisional extension. (C) 2008 Elsevier B.V. All rights reserved. |
| WOS关键词 | A-TYPE GRANITES ; METAMORPHIC CORE COMPLEX ; PALEOZOIC CRUSTAL GROWTH ; TRACE-ELEMENT EVIDENCE ; LACHLAN FOLD BELT ; ISOTOPIC EVIDENCE ; THERMAL EVOLUTION ; SHERMAN BATHOLITH ; CENOZOIC BASALTS ; STABLE-ISOTOPE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000255720100003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68857]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, XiaoHui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, XiaoHui,Zhang, Hongfu,Tang, Yanjie,et al. Geochemistry of Permian bimodal volcanic rocks from central inner Mongolia, North China: Implication for tectonic setting and Phanerozoic continental growth in Central Asian Orogenic Belt[J]. CHEMICAL GEOLOGY,2008,249(3-4):262-281. |
| APA | Zhang, XiaoHui,Zhang, Hongfu,Tang, Yanjie,Wilde, Simon A.,&Hu, Zhaochu.(2008).Geochemistry of Permian bimodal volcanic rocks from central inner Mongolia, North China: Implication for tectonic setting and Phanerozoic continental growth in Central Asian Orogenic Belt.CHEMICAL GEOLOGY,249(3-4),262-281. |
| MLA | Zhang, XiaoHui,et al."Geochemistry of Permian bimodal volcanic rocks from central inner Mongolia, North China: Implication for tectonic setting and Phanerozoic continental growth in Central Asian Orogenic Belt".CHEMICAL GEOLOGY 249.3-4(2008):262-281. |
入库方式： OAI收割
来源：地质与地球物理研究所
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