Late Cretaceous evolution of the Coqen Basin (Lhasa terrane) and implications for early topographic growth on the Tibetan Plateau
文献类型：期刊论文
| 作者 | Sun, Gaoyuan1; Hu, Xiumian1; Sinclair, Hugh D.2; BouDagher-Fadel, Marcelle K.3; Wang, Jiangang4 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2015-07-01 |
| 卷号 | 127期号:7-8页码:1001-1020 |
| DOI | 10.1130/B31137.1 |
| 文献子类 | Article |
| 英文摘要 | The tectonic evolution of the Lhasa terrane (southern Tibetan Plateau) played a fundamental role in the formation of the Tibetan Plateau. However, many uncertainties remain with regard to the tectonic and paleogeographic evolution of the Lhasa terrane prior to the India-Asia collision. To determine the early tectonic processes that controlled the topographic evolution of the Lhasa terrane, we analyze the Cretaceous strata exposed in the Coqen Basin (northern Lhasa subterrane), which comprises the Langshan and Daxiong Formations. The Langshan Formation unconformably overlies the volcanic rocks of the Lower Cretaceous Zelong Group and consists of similar to 80 m of Orbitolina-bearing limestones, which were deposited in a low-energy, shallow marine environment. Micropaleontological analysis indicates that the Langshan Formation in the Coqen Basin was deposited from late Aptian to early Cenomanian times (ca. 113-96 Ma). The overlying Daxiong Formation (similar to 1700 m thick) consists of conglomerate, coarse sandstone, and siltstone with interbedded mudstone, and represents deposits of alluvial fans and braided rivers. The Daxiong Formation was deposited after the early Cenomanian (ca. 96 Ma) and accumulated until at least ca. 91 Ma, indicating accumulation rates of greater than 0.3 km m.y.(-1). By combining paleocurrent data, sandstone petrology, detrital zircon U-Pb ages, and Hf isotope analysis, we demonstrate that the Daxiong Formation was derived from Lower Cretaceous volcanic rocks and pre-Cretaceous strata in the northern Lhasa subterrane. During Late Cretaceous time, two thrust systems with opposite vergence were responsible for transforming the northern Lhasa subterrane into an elevated mountain range. This process resulted in the evolution from a shallow marine environment (Langshan Formation) into a terrestrial depositional environment (Daxiong Formation) on the southern margin of the northern Lhasa subterrane. Given the regional paleogeographic context, we conclude that the Daxiong Formation in the Coqen Basin records local crustal shortening and flexure resulting in foreland basin development on the southern margin of the northern Lhasa subterrane, which implies early topographic growth of the northern Lhasa subterrane in southern Tibet prior to the India-Asia collision. |
| WOS关键词 | ZIRCON U-PB ; INDIA-ASIA COLLISION ; FORE-ARC BASIN ; HF ISOTOPIC CONSTRAINTS ; HOH XIL BASIN ; SOUTHERN TIBET ; TECTONIC EVOLUTION ; CENTRAL ANDES ; GANGDESE BATHOLITH ; EASTERN GANGDESE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000359010800007 |
| 资助机构 | Ministry of Science and Technology of the People's Republic of China 973 Project(2012CB822001) ; Ministry of Science and Technology of the People's Republic of China 973 Project(2012CB822001) ; Chinese Academy of Sciences(XDB03010106) ; Chinese Academy of Sciences(XDB03010106) ; National Natural Science Foundation of China Project(41472081 ; National Natural Science Foundation of China Project(41472081 ; 41172129) ; 41172129) ; Ministry of Science and Technology of the People's Republic of China 973 Project(2012CB822001) ; Ministry of Science and Technology of the People's Republic of China 973 Project(2012CB822001) ; Chinese Academy of Sciences(XDB03010106) ; Chinese Academy of Sciences(XDB03010106) ; National Natural Science Foundation of China Project(41472081 ; National Natural Science Foundation of China Project(41472081 ; 41172129) ; 41172129) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62307]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Jiangsu, Peoples R China 2.Univ Edinburgh, Sch GeoSci, Edinburgh EH8 9XP, Midlothian, Scotland 3.UCL, Dept Earth Sci, London WC1H 0BT, England 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Gaoyuan,Hu, Xiumian,Sinclair, Hugh D.,et al. Late Cretaceous evolution of the Coqen Basin (Lhasa terrane) and implications for early topographic growth on the Tibetan Plateau[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2015,127(7-8):1001-1020. |
| APA | Sun, Gaoyuan,Hu, Xiumian,Sinclair, Hugh D.,BouDagher-Fadel, Marcelle K.,&Wang, Jiangang.(2015).Late Cretaceous evolution of the Coqen Basin (Lhasa terrane) and implications for early topographic growth on the Tibetan Plateau.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,127(7-8),1001-1020. |
| MLA | Sun, Gaoyuan,et al."Late Cretaceous evolution of the Coqen Basin (Lhasa terrane) and implications for early topographic growth on the Tibetan Plateau".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 127.7-8(2015):1001-1020. |
入库方式： OAI收割
来源：地质与地球物理研究所
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