What drove late Mesozoic extension of the northern China-Mongolia tract?
文献类型：期刊论文
| 作者 | Meng, QR |
| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 2003-07-17 |
| 卷号 | 369期号:3-4页码:155-174 |
| 关键词 | crustal extension gravitational collapse Yinshan Daqing Shan northern China and Mongolia |
| ISSN号 | 0040-1951 |
| DOI | 10.1016/S0040-1951(03)00195-1 |
| 英文摘要 | The northern China-Mongolia tract exhibited a tectonic transition from contractional to extensional deformation in late Mesozoic time. Late Middle to early Late Jurassic crustal shortening is widely thought to have resulted from collision of an amalgamated North China-Mongolia block and the Siberian plate, but widespread late Late Jurassic-Early Cretaceous extension has not been satisfactorily explained by existing models. Some prominent features of the extensional tectonics of the northern China-Mongolia tract are: (1) Late Jurassic voluminous volcanism prior to Early Cretaceous large-magnitude rapid extension; (2) overlapping in time of contractional deformation in the Yinshan-Yanshan belt with development of extension-related basins in the interior of the northern China-Mongolia tract; and (3) widespread occurrence of alkali granitic plutonism, extensional basins and metamorphic core complexes in the Early Cretaceous. A new explanation is advanced in this study for this sequence of events. The collision of amalgamated North China-Mongolia with Siberia led to crustal overthickening of the northern China-Mongolia tract and fort-nation of a high-standing plateau. Subsequent breakoff at depth of the north-dipping Mongol-Okhotsk oceanic slab is suggested as the main trigger for late Mesozoic lithospheric extension of that tract. Slab breakoff resulted in mantle lithospheric stretching of the adjacent northern China-Mongolia tract with subsequent ascent of hot asthenosphere and magmatic underplating at the base of the crust. Collectively, these phenomena triggered gravitational collapse of the previously thickened crust, leading to late Late Jurassic-Early Cretaceous crustal extension, and importantly, coeval contraction along the southern margin of the plateau in the Yinshan-Yanshan belt. The proposed model provides a framework for interpreting the spatial and temporal relationships of distinct processes and reconciling some seemingly contradictory phenomena, such as the synchronous extension of northerly terranes during major contraction in the neighboring Yanshan-Yinshan belt. (C) 2003 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000184630100003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78929]  |
| 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 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, QR. What drove late Mesozoic extension of the northern China-Mongolia tract?[J]. TECTONOPHYSICS,2003,369(3-4):155-174. |
| APA | Meng, QR.(2003).What drove late Mesozoic extension of the northern China-Mongolia tract?.TECTONOPHYSICS,369(3-4),155-174. |
| MLA | Meng, QR."What drove late Mesozoic extension of the northern China-Mongolia tract?".TECTONOPHYSICS 369.3-4(2003):155-174. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。