| Sedimentary Characteristics and Paleoenvironmental Records of Zabuye Salt Lake, Tibetan Plateau, since 128 ka BP |
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| 作者姓名： | ZHENG Mianping YUAN Heran LIU Junying LI Yanhe MA Zhibang SUN Qing |
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| 作者单位： | [1]Key Laboratory of Saline Lake Resources and Environment, Ministry of Land and Resources, Beijing 100037 [2]Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037 [3]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 [4]Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029 [5]National Research Center of Geoanalysis, Beijing 100037 |
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| 基金项目： | Acknowledgments This study was supported by National Natural Foundation of China grants 49672115 and 49833010 and State Geological Survey Project Nos. DKD9902004 and DKD2002001. We are grateful to Liu Jianhua for her chemical analysis, to Tong Guobang for his sporopollen analysis and to Pang Qiqing for his analysis of ostracods. |
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| 摘 要： | This paper for the first time reveals high-resolution core records of Zabuye Salt Lake in the interior of the Qinghai-Tibet Plateau. According to 1346 samples taken continuously, relatively accurate 14^C, U-series disequilibrium and ESR ages have been obtained, thus revealing that the lake core ages from 0 to 83.63 m of hole SZK02 are -800 to over 128 ka. In the paper, the lake core sedimentary characteristics （including the lithologies and mineral assemblages） are analyzed in detail and correlated with ostracod assemblages I to XX and sporopollen zones A to I, and on the basis of an integrated analysis of the δ^18O values of authigenic calcium-magnesium carbonate and environmental proxies of minerals, sporopollen and microfossils in the lake core, a correlation has been made of oxygen isotope change between this lake core and the Greenland GISP2 and GRIP and Guliya ice cores, and the climate of Zabuye Salt Lake since 128 ka BP is divided into the last interglacial stage （including substages e, d, c, b and a） of oxygen isotope stage （OIS） 5, early glacial stadial of the last glacial stage of OIS 4, interglacial stadial of the last glacial stage of OIS 3, late glacial stadial of the last glacial stage or Last Glacial Maximum of OIS 2 and postglacial state of OIS 1; in addition, 6 Heinrich （H6-H1） events, Younger Dryas event and 8.2 ka BP cold event have been recognized.
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| 关 键 词： | 咸湖 沉积状 青藏高原 地质学 |
| 修稿时间： | 2007-10-09 |
Sedimentary Characteristics and Paleoenvironmental Records of Zabuye Salt Lake, Tibetan Plateau, since 128 ka BP |
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| Authors: | ZHENG Mianping YUAN Heran LIU Junying LI Yanhe MA Zhibang SUN Qing |
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| Abstract: | This paper for the first time reveals high-resolution core records of Zabuye Salt Lake in the interior of the Qinghai-Tibet Plateau. According to 1346 samples taken continuously, relatively accurate 14C, U-series disequilibrium and ESR ages have been obtained, thus revealing that the lake core ages from 0 to 83.63 m of hole SZK02 are ～800 to over 128 ka. In the paper, the lake core sedimentary characteristics (including the lithologies and mineral assemblages) are analyzed in detail and correlated with ostracod assemblages Ⅰ to ⅩⅩ and sporopollen zones A to I, and on the basis of an integrated analysis of the δ18O values of authigenic calcium-magnesium carbonate and environmental proxies of minerals, sporopollen and microfossils in the lake core, a correlation has been made of oxygen isotope change between this lake core and the Greenland GISP2 and GRIP and Guliya ice cores, and the climate of Zabuye Salt Lake since 128 ka BP is divided into the last interglacial stage (including substages e, d, c, b and a) of oxygen isotope stage (OIS) 5, early glacial stadial of the last glacial stage of OIS 4, interglacial stadial of the last glacial stage of OIS 3, late glacial stadial of the last glacial stage or Last Glacial Maximum of OIS 2 and postglacial state of OIS 1; in addition, 6 Heinrich (H6-H1) events, Younger Dryas event and 8.2 ka BP cold event have been recognized. |
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| Keywords: | Zabuye Salt Lake 130 ka BP sedimentary characteristics paleoenvironmental record |
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