Metamorphic characteristics and geotectonic implications of the high-pressure granulites from Namjagbarwa, eastern Tibet
文献类型：期刊论文
| 作者 | Ding, L; Zhong, DL |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 1999-10-01 |
| 卷号 | 42期号:5页码:491-505 |
| 关键词 | Tibetan Plateau Namjagbarwa HP granulite metamorphism |
| ISSN号 | 1006-9313 |
| 文献子类 | Article |
| 英文摘要 | A large area of high-pressure garnet-kyanite granulite is exhumed in the Namjagbarwa area, which provides a window for observing the deep crust rocks and structures of the Tibetan Plateau. Three mineral assemblages can have been distinguished in the garnet-kyanite HP granulites by petrography, i.e. M-1. Mus + Bi + Pl + Q, M-2. Gt + Ky + perphite/antiperphite + Rt + Q, Ma. Gt + Sill + Cord + Sp + Ilm +/- Opx. Metamorphic conditions of the peak granulite assemblages (M-2) formatted by thickening of crusts, with available isotopic ages of 45-69 Ma, are at 1.4-1.8 Cpa and 750-850 degrees C. Their retrograde assemblages overprinted by decompressure during the uplift, with available isotopic ages of 18-23 Ma, were formed at 0.60-0.70 Cpa, 621-726 degrees C. The thermobarometric evaluation, petrogenetic grid and corresponding isotopic ages indicate a clockwise isothermal decompression metamorphic path. The HP granulite metamorphic history indicates that the collision of the Indian Plate with the Eurasian Plate had begun at 70 Ma, far earlier than the widely accepted 45 Ma. |
| WOS关键词 | GARNET ; THERMOBAROMETRY ; CORDIERITE ; COLLISION ; STABILITY ; INDIA ; ZONE ; MG ; FE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000083322400006 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75512]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Ding, L |
| 作者单位 | Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, L,Zhong, DL. Metamorphic characteristics and geotectonic implications of the high-pressure granulites from Namjagbarwa, eastern Tibet[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,1999,42(5):491-505. |
| APA | Ding, L,&Zhong, DL.(1999).Metamorphic characteristics and geotectonic implications of the high-pressure granulites from Namjagbarwa, eastern Tibet.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,42(5),491-505. |
| MLA | Ding, L,et al."Metamorphic characteristics and geotectonic implications of the high-pressure granulites from Namjagbarwa, eastern Tibet".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 42.5(1999):491-505. |
入库方式： OAI收割
来源：地质与地球物理研究所
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