Geochemistry and petrogenesis of the Xiong'er Group in the southern regions of the North China Craton.
文献类型：期刊论文
| 作者 | Zhao, TP; Jin, CW; Zhai, MG; Xia, B; Zhou, MF |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2002 |
| 卷号 | 18期号:1页码:59-69 |
| 关键词 | Proterozoic bimodal volcanic rocks geochemical characteristics subcontinental mantle source ancient subduction belt North China Craton Xiong'er Group |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The volcanics of the Xiong'er Group are widely distributed in Henan, Shanxi and Shaanxi provinces, distributing an area of more than 60000 km(2). Most of the volcanic sequences vary from 3 km to 7 km in thickness, overlying unconformably the crystalline basement of Archean and palaeo-Proterozoic age, and is covered with the middle-upper Proterozoic terrestrial clastic rocks and carbonate rocks. The volcanic rocks of the Xiong'er Group appear as a bimodal association, and the rocks with SiO2 = 62%+/- are rare. The rocks are composed predomiantly of basaltic andesites and andesites, and minor dacitic-rhyolitic rocks. The mineral assemblage of mafic-intermediate rocks mainly contains pyroxene and plagioclase, and amphiboles and bitotites have not been observed, suggesting an anhydraous environment of their formation. The volcanic rocks of the Xiong'er Group are rich in K2O and FeO* and poor in Al2O3, MgO and CaO. Geochemically the rocks are highly enriched in large-ion lithophile elements (LILE, e.g., K, Rb, Ba) and light REEs (LREE) and are depleted in high field strength elements (HFSE, e.g., Nb, Ta and Ti), probably reflecting the involvement of the continental materials during their eruption, or a derivation from an enriched lithospheric mantle source. The chemical and isotopic data presented in this paper show that the characteristics of the rocks are mainly controlled by a modified enriched mantle source with ancient subduction belt materials during the formation and consolidation of the Archean to paleo-Proterozoic continental crust. Based on the geological features of the Xiong'er Group and the underlying basement, it is suggested that the Xiong'er Group is originated from a failed trident continental rift environment. |
| WOS关键词 | FRACTIONAL CRYSTALLIZATION ; CHEMICAL CLASSIFICATION ; ISOTOPIC CONSTRAINTS ; VOLCANIC-ROCKS ; IGNEOUS ROCKS ; TRACE-ELEMENT ; FLOOD BASALTS ; ORIGIN ; MANTLE ; THOLEIITES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000173669600007 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77481]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhao, TP |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, TP,Jin, CW,Zhai, MG,et al. Geochemistry and petrogenesis of the Xiong'er Group in the southern regions of the North China Craton.[J]. ACTA PETROLOGICA SINICA,2002,18(1):59-69. |
| APA | Zhao, TP,Jin, CW,Zhai, MG,Xia, B,&Zhou, MF.(2002).Geochemistry and petrogenesis of the Xiong'er Group in the southern regions of the North China Craton..ACTA PETROLOGICA SINICA,18(1),59-69. |
| MLA | Zhao, TP,et al."Geochemistry and petrogenesis of the Xiong'er Group in the southern regions of the North China Craton.".ACTA PETROLOGICA SINICA 18.1(2002):59-69. |
入库方式： OAI收割
来源：地质与地球物理研究所
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