Late Quaternary Lake Development and Denivellation of Bankog Co as well as Lake Evolution of Southeastern North Tibetan Plateau during the Last Great Lake Period
详细信息
- 责任者：Zhao Xitao (Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Zhao Yuanyi
- 刊名：Acta Geoscientica Sinica
- 出版年：2011
- 卷期：32(1)
- 关键词：晚第四纪 ; Late Quaternary ; 湖泊沉积作用 ; lacustrine sedimentation ; 西藏 ; Tibet
- 页码：p.13-26
- 图表：6 illus., 5 tables, 23 refs.
- 分类号：1400
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
The Bankog Co is a small lake separated from the eastern part of the Silin Co during the late Late Pleistocene. From May to July, 2003, the authors made a detailed investigation of geomorphology and Quaternary geology along the bank of Bankog Co, which included the leveling survey of lake level elevations, the measurement of lake terrace heights along six profiles and the collection of lake deposit samples for U-series dating. The study results show that there are 6 level terraces (T1-T6) along the Bankok Co. Except that T1 was formed after separation from the Silin Co, the heights above the lake level and U-series ages of the other terraces are 11.8～29.8 m and 10.9±1.9～14.8±1.1 ka B.P. for T2, 32.4～59.8 m and 31.1±2.5 ka B.P. for T3, 52.4～83.7 m and 36.3±3.1～38.8±3.7 ka B.P. for T4, 82.2～112.9 m and 35.1±2.9 ka B.P. for T5, and 121.8～139.8 m and 47.9±3.8 ka B.P. for T6, respectively.
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