Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL086650 |
Pre‐Oxfordian (>163 Ma) ophiolite obduction in central Tibet | |
Anlin Ma; Xiumian Hu; Paul Kapp; Marcelle BouDagher‐; Fadel; Wen Lai | |
2020-04-17 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | The timing of Bangong‐Nujiang suture ophiolite obduction between the Lhasa and Qiangtang terranes in central Tibet is important for understanding the closure history of the Meso‐Tethys, but remains poorly constrained. We investigated subaerial to shallow marine strata of the Dongqiao Formation that sit unconformably on Bangong‐Nujiang suture ophiolites that crystallized in a supra‐subduction zone setting at 189‐181 Ma. Based on foraminiferal and coral studies, the depositional age of the Dongqiao Formation is constrained to be Oxfordian and Kimmeridgian (Late Jurassic). Provenance analyses including detrital modes, geochemistry of detrital chromian spinels, and U‐Pb age populations of detrital zircons suggest the Dongqiao Formation was sourced from uplifted Bangong‐Nujiang suture ophiolites and sedimentary and metamorphic rocks of Lhasa terrane affinity to the south. We conclude that Bangong‐Nujiang suture ophiolites were obducted soon after crystallization (prior to Oxfordian time; >163 Ma) onto the Lhasa terrane or a microcontinent of Lhasa terrane affinity. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249026 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Anlin Ma,Xiumian Hu,Paul Kapp,等. Pre‐Oxfordian (>163 Ma) ophiolite obduction in central Tibet[J]. Geophysical Research Letters,2020. |
APA | Anlin Ma,Xiumian Hu,Paul Kapp,Marcelle BouDagher‐,Fadel,&Wen Lai.(2020).Pre‐Oxfordian (>163 Ma) ophiolite obduction in central Tibet.Geophysical Research Letters. |
MLA | Anlin Ma,et al."Pre‐Oxfordian (>163 Ma) ophiolite obduction in central Tibet".Geophysical Research Letters (2020). |
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