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| 青海贵德盆地晚新生代沉积演化与青藏高原北部隆升 | |
| 引用本文： | 宋春晖,方小敏,李吉均,高军平,孙东,聂军胜,颜茂都.青海贵德盆地晚新生代沉积演化与青藏高原北部隆升[J].地质论评,2003,49(4):337-346. |
| 作者姓名： | 宋春晖 方小敏 李吉均 高军平 孙东 聂军胜 颜茂都 |
| 作者单位： | 1. 兰州大学西部环境教育部重点实验室,资源环境学院,兰州,73000;中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安,710075 2. 兰州大学西部环境教育部重点实验室,资源环境学院,兰州,73000 3. 兰州大学西部环境教育部重点实验室,资源环境学院,兰州,73000;Department,of,Geological,Sciences,University,of,Michigan,Ann,Arbor,MI,48109-1063,USA |
| 基金项目： | 国家重点基础研究发展规划(编号G1998040809)，中国科学院“百人计划”(人教字[2000]05号)，国家自然科学基金(编号49871010) |
| 摘 要： | 青海贵德盆地发育巨厚的新生代地层,并含较丰富的重要哺乳动物化石,对确定盆地及周边相似地层的年代和研究高原隆升过程具有重要的科学意义。本文结合哺乳动物采用典型剖面精确古地磁测年为基础的时间框架,对近11 Ma BP以来盆地沉积相进行了分析,划分出19个沉积岩相和湖泊、三角洲、辫状河流、水下扇三角洲和水上洪积扇5个沉积环境,以及8个沉积演化阶段。通过盆地沉积对构造隆升的响应探讨表明:>11～7.65Ma BP为高原构造稳定期,7.65～3.6Ma BP高原具阶段性逐步隆升构造特征,3.6～>2.6 Ma BP为高原整体快速隆升,2.6Ma BP左右高原大规模挤压断陷,1.8 Ma BP左右高原大规模整体快速隆升并使贵德盆地古湖被切穿排干,黄河在此诞生。 |
| 关 键 词： | 青海 贵德盆地 晚新生代 沉积演化 青藏高原 地层学 沉积相 隆升构造特征 |
Sedimentary Evolution of the Guide Basin in the Late Cenozoic and the Uplift of the Qinghai-Tibet Plateau |
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| SONG Chunhui,FANG Xiaomin,LI Jijun,GAO Junping,SUN Dong,NIE Junsheng,YAN Maodu National Laboratory of Western China's Environmental Systems,College of Resource and Environment,Lanzhou University, State Key Laboratory of Loess and Quaternary Geology & Institute of Earth Environment,Chinese Academy of Science,Xi'an.Sedimentary Evolution of the Guide Basin in the Late Cenozoic and the Uplift of the Qinghai-Tibet Plateau[J].Geological Review,2003,49(4):337-346. | |
| Authors: | SONG Chunhui FANG Xiaomin LI Jijun GAO Junping SUN Dong NIE Junsheng YAN Maodu National Laboratory of Western China's Environmental Systems College of Resource and Environment Lanzhou University State Key Laboratory of Loess and Quaternary Geology & Institute of Earth Environment Chinese Academy of Science Xi'an |
| Institution: | SONG Chunhui,FANG Xiaomin,LI Jijun,GAO Junping,SUN Dong,NIE Junsheng,YAN Maodu National Laboratory of Western China's Environmental Systems,College of Resource and Environment,Lanzhou University, State Key Laboratory of Loess and Quaternary Geology & Institute of Earth Environment,Chinese Academy of Science,Xi'an, Department of Geological Sciences,University of Michigan,Ann Arbor,MI -,USA |
| Abstract: | The extremely thick Cenozoic strata in the Guide basin contain important mammal fossils, which are of great scientific significance for studying the stratigraphic age and the uplift of the plateau. Based on the mammal fossils and paleomagnetic dating of the typical section, a detailed sedimentary study has revealed 19 lithofacies, 5 sedimentary environments and 8 stages of depositional evolution since 11 Ma BP. The corresponding relationship between the sedimentation of the Guide basin and the tectonic uplift reveals that the Plateau has experienced 5 phases from -11 to -1. 8 Ma, which are: the stable phase (>7. 65 Ma) , stepwise uplift phase (7. 65 -3. 6 Ma), rapid and massive uplift phase (3. 6 - >2. 6 Ma), large-scale extrusion and fault subsidence phase (-2. 6 Ma) and large-scale rapid and massive uplift phase (-1. 8 Ma), which caused the Guide basin to be penetrated and dried up, giving birth to the Yellow River. |
| Keywords: | lithofacies depositional evolution tectonic uplift Qinghai -Tibet Plateau Late Cenozoic |
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