Discovery and genetic mechanism of basic granulite in the Altay orogenic belt, Xinjiang, NW China
文献类型：期刊论文
| 作者 | Li, ZL; Chen, HL; Yang, SF; Dong, CW |
| 刊名 | ACTA GEOLOGICA SINICA-ENGLISH EDITION
 |
| 出版日期 | 2004 |
| 卷号 | 78期号:1页码:177-185 |
| 关键词 | Granulite Protolith And Tectonic Setting P-t Condition Genetic Mechanism Altay Orogenic Belt Northwest China |
| ISSN号 | 1000-9515 |
| 文献子类 | Article |
| 英文摘要 | Altay granulite (AG), which represents the product of high-grade metamorphism in the lower crust, was newly found in the Wuqiagou area, Fuyun County in the Altay orogenic belt, Northwest China. It is composed mainly of hypersthene, augite, basic plagioclase, amphibole and brown biotite. Its mineral compositions of amphibole and biotite are rich in Mg/(Mg+Fe2+) and Ti. Geochemically, the AG is enriched in Mg/(Mg+Fe2+) and Al2O3, and poor in CaO, with depletion of U, Th, K and Rb contents. Furthermore, geochemical data reflect that the protolith of the AG is igneous-genetic calc-alkaline basalt formed under an island are environment. The AG has SigmaREE of 92.38-96.58 ppm and enriched LREE model with weak positive Eu anomaly of 1.09-1.15. In the MORB normalized spider diagram, the AG shows tri-doming pattern with a strong negative Nb anomaly and medium negative P and Ti anomalies, reflecting that the AG has tectonic relation with subduction or subduction-related materials. The P-T conditions of peak metamorphism of the AG are 750-780degreesC and >0.6-0.7 GPa. Retrograde metamorphism implies that the protolith of the Altay granulite might undergo a metamorphic process along a clockwise P-T trajectory. Therefore, the formation and evolution of the AG may have a genetic association with continental collision/orogeny and the AG was taken into the Late Paleozoic meta-strata by way of tectonic emplacement. |
| WOS关键词 | CRUSTAL GROWTH ; VOLCANIC-ROCKS ; EVOLUTION ; METAMORPHISM ; AREA ; AGE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000221717300024 |
| 出版者 | GEOLOGICAL SOC CHINA |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/64433]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Li, ZL |
| 作者单位 | 1.Zhejiang Univ, Fac Sci, Dept Earth Sci, Hangzhou 310027, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, ZL,Chen, HL,Yang, SF,et al. Discovery and genetic mechanism of basic granulite in the Altay orogenic belt, Xinjiang, NW China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2004,78(1):177-185. |
| APA | Li, ZL,Chen, HL,Yang, SF,&Dong, CW.(2004).Discovery and genetic mechanism of basic granulite in the Altay orogenic belt, Xinjiang, NW China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,78(1),177-185. |
| MLA | Li, ZL,et al."Discovery and genetic mechanism of basic granulite in the Altay orogenic belt, Xinjiang, NW China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 78.1(2004):177-185. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。