| Discovery of Late Cretaceous garnet two-pyroxene granulite in the southern Lhasa terrane, Tibet and its tectonic significances | |
| Wang JinLi1; Zhang ZeMing1; Dong Xin1; Liu Feng2; Yu Fei2; Wang Wei2; Xu FangJian3; Shen Kun4 | |
| 2009-07-01 | |
| 发表期刊 | ACTA PETROLOGICA SINICA
 |
| ISSN | 1000-0569 |
| 卷号 | 25期号:7页码:1695-1706 |
| 文章类型 | Article |
| 摘要 | The Lhasa terrane, located between the Bangonghu-Nujiang suture zone and the Indus-Yalung Tsangpo suture zone in the southern Tibetan Plateau, was considered previously as a Precambrian continental block. Mesozoic and Cenozoic tectonic evolution of the Lhasa terrane is closely related to the subduction of the Tethys ocean and the collision between the Indian and European continents; so it is one of the keys to reveal the formation and evolution of the Tibetan plateau. The garnet two-pyroxene granulite which was found at the Nyingtri rock group of the southeastern Lhasa terrene consists of garnet, clinopyroxene, orthopyroxene, labradorite, Ti-rich amphibolite and biotite, with a chemical composition of mafic rock. The metamorphic conditions were estimated to be at T = 747 similar to 834 degrees C and P = 0.90 similar to 1.35GPa, suggesting a formation depth of 45km. The zircon U-Pb dating for the garnet amphibolite and marble associated with the granulite give a metamorphic age of 85 similar to 90Ma. This granulite-facies metamorphic event together with a contemporaneous magmatism demonstrated that the southern Lhasa terrane has undergone an Andean-type orogeny at Late Mesozoic time.; The Lhasa terrane, located between the Bangonghu-Nujiang suture zone and the Indus-Yalung Tsangpo suture zone in the southern Tibetan Plateau, was considered previously as a Precambrian continental block. Mesozoic and Cenozoic tectonic evolution of the Lhasa terrane is closely related to the subduction of the Tethys ocean and the collision between the Indian and European continents; so it is one of the keys to reveal the formation and evolution of the Tibetan plateau. The garnet two-pyroxene granulite which was found at the Nyingtri rock group of the southeastern Lhasa terrene consists of garnet, clinopyroxene, orthopyroxene, labradorite, Ti-rich amphibolite and biotite, with a chemical composition of mafic rock. The metamorphic conditions were estimated to be at T = 747 similar to 834 degrees C and P = 0.90 similar to 1.35GPa, suggesting a formation depth of 45km. The zircon U-Pb dating for the garnet amphibolite and marble associated with the granulite give a metamorphic age of 85 similar to 90Ma. This granulite-facies metamorphic event together with a contemporaneous magmatism demonstrated that the southern Lhasa terrane has undergone an Andean-type orogeny at Late Mesozoic time. |
| 关键词 | Granulite Andean-type Orogeny Late Cretaceous Lhasa Terrane Tibetan Plateau |
| 学科领域 | Geology |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000268971200014 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/3702 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.Inst Geol Sci Shangdong, Jinan 250013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang JinLi,Zhang ZeMing,Dong Xin,et al. Discovery of Late Cretaceous garnet two-pyroxene granulite in the southern Lhasa terrane, Tibet and its tectonic significances[J]. ACTA PETROLOGICA SINICA,2009,25(7):1695-1706. |
| APA | Wang JinLi.,Zhang ZeMing.,Dong Xin.,Liu Feng.,Yu Fei.,...&Shen Kun.(2009).Discovery of Late Cretaceous garnet two-pyroxene granulite in the southern Lhasa terrane, Tibet and its tectonic significances.ACTA PETROLOGICA SINICA,25(7),1695-1706. |
| MLA | Wang JinLi,et al."Discovery of Late Cretaceous garnet two-pyroxene granulite in the southern Lhasa terrane, Tibet and its tectonic significances".ACTA PETROLOGICA SINICA 25.7(2009):1695-1706. |
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