|
|||||
|
|
Flexural subsidence by 29 Ma on the NE edge of Tibet from the magnetostratigraphy of Linxia Basin, China |
|
| Authors: | Xiaomin Fang Carmala Garzione Rob Van der Voo Jijun Li and Majie Fan |
| Institution: | a MOE National Laboratory of Western China’s Environmental Systems and College of Resources and Environment, Lanzhou University, Lanzhou, Gansu 730000, PR China b State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS, Xi’an, Shanxi 710054, China c Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, USA d Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109, USA |
| Abstract: | This study provides a detailed magnetostratigraphic record of subsidence in the Linxia Basin, documenting a 27 Myr long sedimentary record from the northeastern edge of the Tibetan Plateau. Deposition in the Linxia Basin began at  29 Ma and continued nearly uninterruptedly until 1.7 Ma. Increasing rates of subsidence between 29 and 6 Ma in the Linxia Basin suggest deposition in the foredeep portion of a flexural basin and constrain the timing of shortening in the northeastern margin of the plateau to Late Oligocene–Late Miocene time. By Late Miocene–Early Pliocene time, a decrease in subsidence rates in the Linxia Basin associated with thrust faulting and a 10° clockwise rotation in the basin indicates that the deformation front of the Tibetan plateau had propagated into the currently deforming region northeast of the plateau. |
| Keywords: | Asia magnetostratigraphy flexural basin fold and thrust belt Tibetan Plateau |
| 本文献已被 ScienceDirect 等数据库收录！ | |