Study on geochronology and its geological significance of the Demala Group complex in Chayu area, Southeast Tibetan Plateau
文献类型：期刊论文
| 作者 | Dong YongSheng1; Li Cai1; Chen Hui2; Chen Wen3; Zhang Yan3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2011-04-01 |
| 卷号 | 27期号:4页码:1198-1208 |
| 关键词 | Gangdise block Demala Group complex Zircon U-Pb age Biotite(40)Ar-Ar-39 age Tibetan Plateau |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The Demala Group complex, located in Southeast Gangdise block of Tibetan Plateau, is a suite of amphibolite facies metamorphic rocks. Conventionally it is known as Precambrian metamorphic basement, but without credible geochronology evidences. In this paper, we focus on the samples biotite-hornblende schist and biotite-quartz schist we recently obtain in this area. Results of zircon U-Pb study display that the U-Pb age of magmatic zircons from biotite-hornblende schist is 217.1Ma and detrital zircons from biotite-quartz schist is mainly 520 similar to 600Ma and 900 similar to 1100Ma. The biotite Ar-40-Ar-39 age of the biotite-hornblende schist is 22.3Ma and the biotite-quartz schist is 16.3Ma and 22.3Ma, representing the age of their later metamorphism. These accurate geochronology evidences above at least suggests that the Demala Group complex is a suite of metamorphic complex which consists of Paleozoic sedimentary stratum and Mesozoic intrusive rocks modified by the Cenozoic magmatism and metamorphism, although we can not completely negate the existence of Precambrian metamorphic basement in Chayu area, Southeast Tibetan Plateau. |
| WOS关键词 | LHASA TERRANE ; TECTONIC IMPLICATIONS ; METAMORPHISM ; MAGMATISM ; AGE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000290080200024 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/74363]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Dong YongSheng |
| 作者单位 | 1.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chinese Acad Geol Sci, Inst Geol, MLR, Lab Isotop Geol, Beijing 100037, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong YongSheng,Li Cai,Chen Hui,et al. Study on geochronology and its geological significance of the Demala Group complex in Chayu area, Southeast Tibetan Plateau[J]. ACTA PETROLOGICA SINICA,2011,27(4):1198-1208. |
| APA | Dong YongSheng,Li Cai,Chen Hui,Chen Wen,&Zhang Yan.(2011).Study on geochronology and its geological significance of the Demala Group complex in Chayu area, Southeast Tibetan Plateau.ACTA PETROLOGICA SINICA,27(4),1198-1208. |
| MLA | Dong YongSheng,et al."Study on geochronology and its geological significance of the Demala Group complex in Chayu area, Southeast Tibetan Plateau".ACTA PETROLOGICA SINICA 27.4(2011):1198-1208. |
入库方式： OAI收割
来源：地质与地球物理研究所
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