| Paleotethyan evolution of the Indochina Block as deduced from granites in northern Laos | |
| Wang, SF (Wang, Shifeng)1; Mo, YS (Mo, Yasi)2; Wang, C (Wang, Chao)2; Ye, PS (Ye, Peisheng)1; Wang, SF | |
| Source Publication | GONDWANA RESEARCH
 |
| 2016 | |
| Volume | 38Issue:0Pages:183-196 |
| DOI | 10.1016/j.gr.2015.11.011 |
| Abstract | The Paleotethyan evolution of the Southeast Asia has become better understood in recent years. Questions remain, however, over the role of the Dien Bien Phu Suture Zone in the evolution of the Indochina Block and whether the Song Ma Suture represents the boundary between the Indochina Block and the South China Block. Granitoid geochronological and geochemical data obtained in northern Laos provide new information vis-a-vis these arguments. Zircon U-Pb ages togetherwith whole rock, trace and rare earth element data from 27 granitic rocks from five complexes allow us to conclude that these granites are typical of I-type Indosinian volcanic arc granites. However, the 234-256 Ma I-type granites mismatch the initiation age obtained from the ductile shear zone of the Dien Bien Phu Fault, thus repudiating the existence of the Dien Bien Phu Suture Zone. This then implies that the Qamdo-Simao and Indochina blocks were united. The geochemical and geochronological data further suggest that the main crust in the Indochina Block formed in the Late Paleoproterozoic to Early Mesoproterozoic, much later than the Archean crustal formation age identified east of the SongMa Suture. Moreover, the 440-404Ma and 234-256 Ma I-type granites suggest that the boundary between Indochina and South China should be the Jinsha River Suture-SongMaSuture-KontumMassif, instead of the Jinsha River Suture-Song Chay Suture. Finally, the Emeishan basalt and granite complexes both formpart of the South China tectonic units subducting westward under the Qamdo-Simao and Indochina blocks. (C) 2015 The Authors. Published by Elsevier B. V. on behalf of International Association for Gondwana Research. |
| Subject Area | 地质学 |
| WOS ID | WOS:000397872600012 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | U-pb Geochronology Truong Son Belt Bien-phu Fault Plume-lithosphere Interaction Emeishan Flood Basalts Plate Tectonic Model River Shear Zone A-type Granites Central Vietnam Southeast-asia |
| Cooperation Status | 国内 |
| Department | 碰撞与隆升 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/7536 |
| Collection | 图书馆 |
| Corresponding Author | Wang, SF |
| Affiliation | 1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, SF ,Mo, YS ,Wang, C ,et al. Paleotethyan evolution of the Indochina Block as deduced from granites in northern Laos[J]. GONDWANA RESEARCH,2016,38(0):183-196. |
| APA | Wang, SF ,Mo, YS ,Wang, C ,Ye, PS ,&Wang, SF.(2016).Paleotethyan evolution of the Indochina Block as deduced from granites in northern Laos.GONDWANA RESEARCH,38(0),183-196. |
| MLA | Wang, SF ,et al."Paleotethyan evolution of the Indochina Block as deduced from granites in northern Laos".GONDWANA RESEARCH 38.0(2016):183-196. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.38 183-196 2016.pd（3472KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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