| 光谱学与光谱分析 |
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| X-Ray Powder Diffraction of Clay Minerals of SZK01 Core of Zabuye Lake, Tibetan Plateau |
| ZHANG Xue-fei, ZHENG Mian-ping* |
| Institute of Mineral Resources, China Academy of Geological Sciences, Ministry of Land and Resources Key Laboratory of Saline Lake Resources and Environments, Beijing 100037, China |
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Abstract The present article chooses the core from the borehole SZK01 in Zabuye Lake as the main research object. According to the results of X-ray powder diffraction of clay minerals, the major components are illite, illite and smectite mixed layer mineral(I/S), kaolinite and chlorite. According to the different species and contents of clay, integration of the characteristics of mineral and the results of δ18O, we reestablished the evolution process of paleoclimate in Zabuye Lake. In compaison with SZK02 core in Zabuye, Greenland GISP2 and GRIP and Guliya ice core, it contains 5 stages since 115 ka in Zabuye: the last interglacial(115～75.5 ka), the earlier last glacial(75.5～60 ka), the interstage of the last glacial(60～30.1 ka), the last glacial maximum(30.1～16.7 ka) and deglacial-holocene(since 16.7 ka). We also recognized 6 Heinrich events (H1-H6) and warm event in 71 ka. In particular, the content of kaolinite is low, with the negative-skewed value of δ18O in 52～53 ka, while the value of δ18O in SZK02 and Guliya ice core is negative-skewed too, indicating the cold event in Tibet plateau, named H5-1. All the above demonstrated that the climate in Tibet plateau is global since the earlier last glacial, and it also has regional characteristics.
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Received: 2014-01-23
Accepted: 2014-04-08
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Corresponding Authors:
ZHENG Mian-ping
E-mail: zhengmp2010@126.com
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