| 根据湖相沉积碳氧同位素估算青藏高原古海拔高度 |
| |
| 引用本文： | 吴珍汉,赵逊,叶培盛,吴中海,胡道功,周春景.根据湖相沉积碳氧同位素估算青藏高原古海拔高度[J].地质学报,2007,81(9):1277-1288. |
| |
| 作者姓名： | 吴珍汉 赵逊 叶培盛 吴中海 胡道功 周春景 |
| |
| 作者单位： | 1. 中国地质科学院地质力学研究所,北京,100081
2. 中国地质科学院,北京,100037 |
| |
| 基金项目： | 科技部国际合作项目(编号2006DFB211330)，地调局青藏高原综合研究与INDEPTH-IV项目联合资助的成果。 |
| |
| 摘 要： | 青藏高原湖相沉积碳氧同位素、海拔高度与年均气温存在函数关系。对青藏高原南部14个不同海拔高度的第四纪湖相沉积露头,在剖面不同部位采集了35个湖相沉积样品,结合海拔高度与年均气温的相关分析,建立了湖相沉积碳氧同位素古海拔高度计。再对青藏高原南部、青藏高原北部、东昆仑南部和柴达木盆地不同地点出露的渐新世、中新世早中期、上新世—早更新世湖相沉积地层,分别取样进行碳氧同位素分析,计算不同时期的古年均气温和古海拔高度。结果表明,青藏高原大部分地区中新世早中期整体隆升至海拔约4000m高度,五道梁—东昆仑南部中新世早中期整体隆升至海拔约3500m高度,柴达木盆地中新世早中期隆升至海拔约2500m高度。这些资料对认识青藏高原隆升时代和气候环境演化具有重要意义。
|
| 关 键 词： | 湖相沉积 碳氧同位素 年均气温 古海拔高度 青藏高原 |
| 修稿时间： | 2007-06-14 |
Paleo-Elevation of the Tibetan Plateau inferred from Carbon and Oxygen Isotopes of Lacustrine Deposits |
| |
| WU Zhenhan,ZHAO Xun,YE Peisheng,WU Zhonghai,HU Daogong,ZHOU Chunjing.Paleo-Elevation of the Tibetan Plateau inferred from Carbon and Oxygen Isotopes of Lacustrine Deposits[J].Acta Geologica Sinica,2007,81(9):1277-1288. |
| |
| Authors: | WU Zhenhan ZHAO Xun YE Peisheng WU Zhonghai HU Daogong ZHOU Chunjing |
| |
| Institution: | 1 Institute of Geomechanics,CAGS,Beijing,100081; 2 Chinese Academy of Geological Sciences,Beijing,100037 |
| |
| Abstract: | Functional relationship exists among carbon and oxygen isotopes of lacustrine deposits, elevation and mean annual temperature in the Tibetan Plateau. Paleo-altimetry was established by statistical analyses on carbon and oxygen isotopes of 35 lacustrine samples from 14 outcrops at different elevations in the southern Tibetan Plateau. Such a paleo-altimetry was used for calculating paleo-annual temperature and paleo-elevation of the Tibetan Plateau based on carbon and oxygen isotopes of lacustrine sediments formed in the Oligocene, Early-Middle Miocene and Pliocene-Early Pleistocene. The results show that most areas of the Tibetan Plateau uplifted to ~4000m, the Wudaoliang Basin and the southern part of Kunlun Mts. to ~3500m and the Qaidam Basin to ~2500m in the Early-Middle Miocene. These data are of significance for better understanding uplifting process and environment change of the Tibetan Plateau. |
| |
| Keywords: | lacustrine deposits carbon and oxygen isotopes mean annual temperature paleo-elevation the Tibetan Plateau |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质学报》浏览原始摘要信息 |
| 点击此处可从《地质学报》下载免费的PDF全文 |
|
