| Paleoclimate Changes during the Early Oligocene in the Hoh Xil Region, Northern Tibetan Plateau |
| |
| 作者姓名： | Alain TRENTESAUX |
| |
| 作者单位： | UMR PBDS |
| |
| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，上海市青年科技启明星计划 |
| |
| 摘 要： | Sedimentological, cyclic-stratigraphic, paleomagnetic, and clay-mineralogical studies on the early Oligocene Yaxicuo Group in the Hoh Xil Basin, the largest Cenozoic sedimentary basin in the hinterland of the Tibetan Plateau, provide abundant information of paleoclimate changes. A 350-m thick section in the middle-lower Yaxicuo Group was analyzed to reveal the climatic history that occurred in the Hoh Xil region during the early Oligocene interval 31.30-30.35 Ma, dated with the paleomagnetic chronostratigraphy. The results indicate that arid and cold climate dominated the Hoh Xil region during the early Oligocene in general, being related to the global cooling and drying events that occurred in the earliest Oligocene. Within this period, relatively warm and wet climate accompanied by strong tectonic activity occurred in the 31.05-30.75 Ma interval; while arid and cold climate and relatively inactive tectonics occurred in the 31.30-31.05 and 30.75-30.35 Ma intervals. Furthermore, spectral analyses of hig
|
Paleoclimate Changes during the Early Oligocene in the Hoh Xil Region, Northern Tibetan Plateau |
| |
| Authors: | LIU Zhifei WANG Chengshan Alain TRENTESAUX ZHAO Xixi YI Haisheng HU Xiumian and JIN Wei Laboratory of Marine Geology Tongji University Shanghai Chin |
| |
| Institution: | LIU Zhifei,WANG Chengshan,Alain TRENTESAUX,ZHAO Xixi,YI Haisheng,HU Xiumian and JIN Wei Laboratory of Marine Geology,Tongji University,Shanghai,Chin,Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu,Sichuan,China UMR PBDS du CNRS,Universite des Sciences et Technologies de Lille,Villeneuve d'Ascq,FranceCenter for Study of Imaging and Dynamics of the Earth,Institute of Geophysics and Planetary Physics,University of Californi,Santa Cruz,CA,USA |
| |
| Abstract: | Sedimentological, cyclic-stratigraphic, paleomagnetic, and clay-mineralogical studies on the early Oligocene Yaxicuo Group in the Hoh Xil Basin, the largest Cenozoic sedimentary basin in the hinterland of the Tibetan Plateau, provide abundant information of paleoclimate changes. A 350-m thick section in the middle-lower Yaxicuo Group was analyzed to reveal the climatic history that occurred in the Hoh Xil region during the early Oligocene interval 31.30-30.35 Ma, dated with the paleomagnetic chronostratigraphy. The results indicate that arid and cold climate dominated the Hoh Xil region during the early Oligocene in general, being related to the global cooling and drying events that occurred in the earliest Oligocene. Within this period, relatively warm and wet climate accompanied by strong tectonic activity occurred in the 31.05-30.75 Ma interval; while arid and cold climate and relatively inactive tectonics occurred in the 31.30-31.05 and 30.75-30.35 Ma intervals. Furthermore, spectral analyses of high-temporal resolution paleoclimatic records show orbital periods including eccentricity, obliquity, and precession. It is concluded that paleoclimate changes during the early Oligocene in the Hoh Xil region were forced by both tectonic activity and orbital periods. |
| |
| Keywords: | climate changes early Oligocene Hoh Xil Basin Tibetan Plateau tectonic forcing astronomical periods |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《Acta Geologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Geologica Sinica》下载免费的PDF全文 |
|
