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| 青藏高原中东部第四纪冰碛物暴露年龄的测定及其意义 | |
| 引用本文： | 赵志中,乔彦松,Joerg SCH.青藏高原中东部第四纪冰碛物暴露年龄的测定及其意义[J].地学前缘,2006,13(5):316-320. |
| 作者姓名： | 赵志中 乔彦松 Joerg SCH |
| 作者单位： | 1. 中国地质科学院,地质力学研究所,北京,100081 2. ETH Zürich,Isotope Geology and Mineral Resources,NO-C61,CH-8092 Zürich,Switzerland 3. Universitat Bern,Geologisches Institut,CH-3012 Bern,Switzerland |
| 基金项目： | 中国地质调查局地质调查项目;国土资源部基础研究项目 |
| 摘 要： | 青藏高原上大面积的冰盖通常会对亚洲乃至全球气候产生深远的影响。青藏高原第四纪冰川形成的时间和范围成为人们关注的热点。本研究利用就地成因的宇宙核素暴露年龄测定方法,对唐古拉山和理塘地区的第四纪冰碛物进行了10Be、26Al和21Ne暴露年龄测定,首次获得了青藏高原的第四纪冰川核素暴露年龄。三种核素暴露年龄的一致性显示每期冰碛物沉积有一个确定的暴露时期,测试结果表明唐古拉山和理塘地区出现了两期第四纪冰期,一期形成于距今1·6~8万年,另一期形成于距今16~18万年。 |
| 关 键 词： | 青藏高原 第四纪冰川 表面暴露年龄 唐古拉山 理塘 |
| 文章编号： | 1005-2321（2006）05-0316-05 |
| 收稿时间： | 2006-01-19 |
| 修稿时间： | 2006-03-13 |
Exposure ages of moraines in the eastern and central Qinghai-Tibet plateau and their significance |
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| ZHAO Zhi-zhong,QIAO Yan-song,Joerg SCHFER,WANG Yan,WANG Min,Christian SCHLCHTER.Exposure ages of moraines in the eastern and central Qinghai-Tibet plateau and their significance[J].Earth Science Frontiers,2006,13(5):316-320. | |
| Authors: | ZHAO Zhi-zhong QIAO Yan-song Joerg SCHFER WANG Yan WANG Min Christian SCHLCHTER |
| Institution: | Joerg SCH(A)FER,Christian SCHL(U)CHTER,ZHAO Zhi-zhong,QIAO Yan-song,Joerg SCH(A)FER,WANG Yan,WANG Min,Christian SCHL(U)CHTER |
| Abstract: | Large glacial sheets in the Qinghai-Tibet plateau have an important effect on both Asian and global climate.. There is much interest in the timing and duration of the Quaternary glacial in the plateau. Using cosmogenic determinations we have obtained the first in-situ morainal exposure ages from the glacial moraine in the Tanggula mountain and Litang. The three kinds of exposure ages from ^10 Be,^26 Al, and 21 Ne are similar. According to our dating, there were two glaciations, one formed between 16-80 ka B. P. , and the other between 160-180 ka B. P. |
| Keywords: | Qinghai-Tibet plateau Quaternary glacial cosmogenic surface exposure ages Tanggula mountain Litang area |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |