Mesozoic sedimentation of the southern Hefei basin and exhumation of the Dabieshan metamorphic terrane.
文献类型：期刊论文
| 作者 | Meng, QR; Li, RW; Li, SY |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2005-07-01 |
| 卷号 | 21期号:4页码:1145-1156 |
| 关键词 | Hefei Basin Dabie Shan Mesozoic Sedimentation Exhumation |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Mesozoic tectono-sedimentary evolution of the southern Hefei basin can be divided into two distinct stages. The first stage is featured by extensional subsidence and southward expansion of the basin in Jurassic time, while the second stage is characterized by vigorous volcanic eruptions in the southern margin of the basin and northward migration of main depositional area. The Hefei basin was initiated in the Early Jurassic, but the Mid Late Jurassic saw a period of pronounced subsidence. Alluvial fan and braided fluvial systems dominated proximal areas of the basin, and were evidently controlled by basin-border faults. The basin expanded to the south as a result of the south-directed migration of the normal faulting. Fluvial lacustrine sedimentation were prevalent in the main area of the basin. Sediments were demonstrated to have come from the Dabieshan metamorphic terrane, as indicated by the restored paleo-current directions. Detrital Triassic metamorphic zircons with coesite inclusions have recently been recognized in Lower Jurassic Fanghushan Formation, thereby suggesting that the ultrahigh-pressure metamorphic rocks must have been exhumed to the surface in the Early Jurassic. Occurrence of eclogite gravels in the Fenghuangtai Formation indicates that the Dabieshan terrane experienced marked denudation in the Late Jurassic. The southern Hefei basin underwent the uplift in association of vigorous volcanism, and basin depositional area was shifted far to the north. The two-stage evolution of the Hefei basin is indicative of a change of tectonic settings in the Dabieshan terrane and adjacent regions. It is proposed that the ultrahigh-pressure rocks might have been brought up to the surface by means of laterally upward extrusion. The extrusion model not only explains Jurassic extensional subsidence of the Hefei basin to the north of the Dabie Shan terrane, but also accounts for coeval development of fold-thrust system of the southern Dabie Shan and formation of foreland basin to the south. Regional crustal extension and striking magmatism within the Dabieshan terrane and surrounding areas are considered the consequence of the upwelling of asthenospheric hot materials, presumably triggered by the foundering of subducted lithospheric slab. |
| WOS关键词 | EAST-CENTRAL CHINA ; ULTRAHIGH-PRESSURE METAMORPHISM ; TAN-LU FAULT ; COESITE-BEARING ECLOGITES ; CONTINENTAL-CRUST ; ZIRCON AGES ; AR-40/AR-39 THERMOCHRONOLOGY ; COOLING HISTORY ; OROGENIC BELT ; ROCKS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000232291300013 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65504]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Meng, QR |
| 作者单位 | 1.NW Univ Xian, Dept Geol, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Hefei Univ Technol, Coll Resources & Environm Engn, Hefei 230009, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, QR,Li, RW,Li, SY. Mesozoic sedimentation of the southern Hefei basin and exhumation of the Dabieshan metamorphic terrane.[J]. ACTA PETROLOGICA SINICA,2005,21(4):1145-1156. |
| APA | Meng, QR,Li, RW,&Li, SY.(2005).Mesozoic sedimentation of the southern Hefei basin and exhumation of the Dabieshan metamorphic terrane..ACTA PETROLOGICA SINICA,21(4),1145-1156. |
| MLA | Meng, QR,et al."Mesozoic sedimentation of the southern Hefei basin and exhumation of the Dabieshan metamorphic terrane.".ACTA PETROLOGICA SINICA 21.4(2005):1145-1156. |
入库方式： OAI收割
来源：地质与地球物理研究所
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