WEI Lejun,ZHENG Mianping,LIU Xifang,CAI Keqin and NIE Zhen Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037 China University of Geosciences,Beijing 100083 Open Laboratory of Saline Lake Resources & Environment,Chinese Academy of Geological Sciences,Beijing 100037 Fei Zhenbi
P619.219
The authors investigated lacustrine chemical sediments on terrace-I of Dong Co-a salt lake in the interior of the northern Tibetan Plateau and firstly discovered borax and a complete sedimentary section with five pure mirabilite beds. According to the sedimentary characteristics of rhythmic layering, palaeotemperatures for the formation of the cold-phase mineral-mirabilite-at the profiles and 14C dating, the authors applied the theory and method of comparative salinology in the study of the history of the palaeoclimate and palaeoenvironment of Dong Co in the early and middle Holocene and drew the conclusion that the salt lake had experienced the following climatic evolution: the warm and moist stage (>8470 a BP and possibly to 10500 a BP)→cold and dry stage (8470-8170 a BP)→warm and moist stage (8170-7590 a BP)→stage of repeated climatic oscillations (7590-7400 a BP, alternation of three dry oscillations and three moist oscillations in a generally cold climatic background)→cold and dry stage (7400-6
WEI Lejun, ZHENG Mianping, LIU Xifang, CAI Keqin, NIE Zhen Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing China University of Geosciences, Beijing Open Laboratory of Saline Lake Resources & Environment, Chinese Academy of Geological Sciences, Beijing Fei Zhenbi.2002. Discovery of Borax-bearing Mirabilite Beds in Dong Co, Northern Tibet, and Its Palaeoclimatic Significance[J]. Acta Geologica Sinica(),76(3):
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