Geochronology and geochemistry of the Middle Proterozoic Aoyougou ophiolite in the North Qilian Mountains, northwestern China
文献类型：期刊论文
| 作者 | Zhang, ZC; Mao, JW; Zuo, GC; Yang, JM; Robinson, PT |
| 刊名 | ACTA GEOLOGICA SINICA-ENGLISH EDITION
 |
| 出版日期 | 2001-03-01 |
| 卷号 | 75期号:1页码:41-50 |
| 关键词 | Proterozoic ophiolite geochronology geochemistry North Qilian Mountains |
| ISSN号 | 1000-9515 |
| 文献子类 | Article |
| 英文摘要 | The Aoyougou ophiolite lies in an early Palaeozoic orogenic belt of the western North Qilian Mountains, near the Aoyougou valley in Gansu Province, northwestern China. It consists of serpentinite, a cumulate sequence of gabbro and diorite, pillow and massive lavas, diabase and chert. Ages of 1840 +/-2 Ma, 1783 +/-2 Ma and 1784 +/-2 Ma on three zircons from diabase, indicate an early Middle Proterozoic age. The diabases and basalts show light rare-earth element enrichment and have relatively high TiO(2) contents, characteristic of ocean island basalts. All of the lavas have low MgO, Cr, Ni contents and Mg numbers indicating a more evolved character. They are believed to have been derived from a more mafic parental magma by fractionation of olivine, Cr-spinel and minor plagioclase. Based on the lava geochemistry and regional geology, the Aoyougou ophiolite was probably believed to have formed at a spreading centre in a small marginal basin. Subduction of the newly formed oceanic lithosphere in the Middle Proterozoic produced a trench-are-basin system, which is preserved in the North Qilian Mountains. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000168021700005 |
| 出版者 | WILEY-BLACKWELL |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/76813]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, ZC |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Chinese Acad Biol Sci, Inst Mineral Deposits, Beijing 100037, Peoples R China 3.Gansu Bur Geol & Mineral Resources, Inst Geol, Lanzhou 730000, Peoples R China 4.Dalhousie Univ, Ctr Marine Geol, Halifax, NS B3H 3J5, Canada |
| 推荐引用方式 GB/T 7714 | Zhang, ZC,Mao, JW,Zuo, GC,et al. Geochronology and geochemistry of the Middle Proterozoic Aoyougou ophiolite in the North Qilian Mountains, northwestern China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2001,75(1):41-50. |
| APA | Zhang, ZC,Mao, JW,Zuo, GC,Yang, JM,&Robinson, PT.(2001).Geochronology and geochemistry of the Middle Proterozoic Aoyougou ophiolite in the North Qilian Mountains, northwestern China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,75(1),41-50. |
| MLA | Zhang, ZC,et al."Geochronology and geochemistry of the Middle Proterozoic Aoyougou ophiolite in the North Qilian Mountains, northwestern China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 75.1(2001):41-50. |
入库方式： OAI收割
来源：地质与地球物理研究所
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