| Title | Cenozoic structural inversion from transtension to transpression in Yingxiong Range, western Qaidam Basin: New insights into strike-slip superimposition controlled by Altyn Tagh and Eastern Kunlun Faults |
| Authors | Cheng, Xiang Zhang, Daowei Jolivet, Marc Yu, Xiangjiang Du, Wei Liu, Runchao Guo, Zhaojie |
| Affiliation | Peking Univ, Sch Earth & Space Sci, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China. Petrochina, Qinghai Oilfield Co, Dunhuang 736202, Gansu, Peoples R China. Univ Rennes 1, CNRS UMR6118, Lab Geosci Rennes, F-35042 Rennes, France. |
| Keywords | Qaidam Basin Yingxiong Range Right-stepping en-echelon anticlines Transtension to transpression inversion Strike-slip superimposition NE TIBETAN PLATEAU U-PB GEOCHRONOLOGY NORTHERN TIBET TECTONIC IMPLICATIONS NW CHINA MAGNETIC-SUSCEPTIBILITY CONSTRAINTS MAGNETOSTRATIGRAPHY EVOLUTION UPLIFT |
| Issue Date | 2018 |
| Publisher | TECTONOPHYSICS |
| Citation | TECTONOPHYSICS. 2018, 723, 229-241. |
| Abstract | A Cenozoic structural inversion event from transtension to transpression involving salt tectonics has been uncovered in the Yingxiong Range, the western Qaidam Basin. Seismic reflection data show that there are two common structural styles in the Yingxiong Range: (1) the positive flower structure; (2) the thrust-controlled fold at shallow depth and the positive inverted flower structure at deep levels, which are separated by a salt layer in the upper Xiaganchaigou Formation. The Yingxiong Range experienced a first stage of transtension in the Eocene, induced by the Altyn Tagh Fault, and a second stage of transpression from the early Miocene to present, jointly controlled by the Altyn Tagh and Eastern Kunlun Faults. The Eocene transtension produced numerous NW-striking right-stepping en-echelon transtensional normal faults or fractures in the Yingxiong Range. At the same time, evaporites and mudstone were deposited in the vicinity of these faults. In the early Miocene, the Eocene transtensional normal faults were reactivated in a reverse sense, and the thrust-controlled folds at shallow depth started to form simultaneously. With transpression enhanced in the late Cenozoic, positive flower structures directly formed in places without evaporites. The Cenozoic transtension to transpression inversion of the Yingxiong Range is the result of strike-slip superimposition controlled by the Altyn Tagh and Eastern Kunlun Faults in time and space. |
| URI | http://hdl.handle.net/20.500.11897/512485 |
| ISSN | 0040-1951 |
| DOI | 10.1016/j.tecto.2017.12.019 |
| Indexed | SCI(E) |
| Appears in Collections: | 地球与空间科学学院 造山带与地壳演化教育部重点实验室 |
