Geochemistry of the volcanic rocks in the Dapingzhang ore district, Simao, Yunnan province and its tectonic significance
文献类型：期刊论文
| 作者 | Zhong, H; Hu, RZ; Zhou, XH; Ye, ZJ |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2004-05-01 |
| 卷号 | 20期号:3页码:567-574 |
| 关键词 | spilite-quartz keratophyre formation island-arc environment Dapingzhang |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The spilite-quartz keratophyre formations in the Dapingzhang ore district are typical bimodal rocks lack of intermediate rocks with 52% similar to 61% SiO2, which are most probably formed under island-are environment indicated by their low TiO2 concentrations and other petrochemical characteristics and REE geochemistry. Furthermore, the N-MORB normalized spider diagrams of incompatible elements of the rocks are characterized by enrichments in Ba, Nd, Sm, and depletions in Nb, Sr, Ti. The enrichment in Ba and depletion in Nb are regarded as major indicative characteristics of island-arc volcanism. The very low Nb/Y and Zr/TiO2 ratios of spilites, low Nb/Y and Zr/TiO2 ratios and range of Zr/Y, (La/Yb)(N) ratios of quartz keratophyres in the Dapingzhang ore district suggest that they are formed under island-arc environment. The Sr, Nd isotopic characteristics of the volcanic rocks are similar to those of the typical island-are-type volcanic rocks in the world. It is suggested that the parent magma was derived from a depleted mantle, which was influenced by crustal contamination and/or seawater hydrothermal alteration. The high concentrations of radiogenic lead in the rocks are also related to the island-arc environment. As a result, the formation of Dapingzhang copper-polymetallic deposit might be controlled by bimodal volcanism under island-arc environment. |
| WOS关键词 | MASSIVE SULFIDE MINERALIZATION ; EARTH ELEMENT MOBILITY ; GEODYNAMICS ; EVOLUTION ; AUSTRALIA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000222897200020 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/79372]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhong, H |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Lab Lithosphere Tecton Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhong, H,Hu, RZ,Zhou, XH,et al. Geochemistry of the volcanic rocks in the Dapingzhang ore district, Simao, Yunnan province and its tectonic significance[J]. ACTA PETROLOGICA SINICA,2004,20(3):567-574. |
| APA | Zhong, H,Hu, RZ,Zhou, XH,&Ye, ZJ.(2004).Geochemistry of the volcanic rocks in the Dapingzhang ore district, Simao, Yunnan province and its tectonic significance.ACTA PETROLOGICA SINICA,20(3),567-574. |
| MLA | Zhong, H,et al."Geochemistry of the volcanic rocks in the Dapingzhang ore district, Simao, Yunnan province and its tectonic significance".ACTA PETROLOGICA SINICA 20.3(2004):567-574. |
入库方式： OAI收割
来源：地质与地球物理研究所
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