• 责任者：Ma Nina (Key Laboratory of Saline Lake Resources and Environment ; Ministry of Land and Resources ; Beijing 100037 ; China) ; Zheng Mianping
• 刊名：Acta Geologica Sinica
• 出版年：2011
• 卷期：85(3)
• 关键词：更新世 ; Pleistocene ; 全新世 ; Holocene ; 柴达木盆地 ; Qaidam Basin
• 页码：p.433-444
• 图表：6 illus., 2 tables, 33 refs.
• 分类号：1400
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

Based on two field survey in the Dalangtan area of Qaidam Basin, many outcrops of mirabilite and carbonate clay interlayers were found in Xiaoliangshan. The well D26 section was selected for research in this study. The comparative study shows that mirabilite is a typical cold saline mineral and carbonate clay and gypsum is indicative of relative cool and semiarid conditions. Using mineralogical identification of mirabilite and carbonate clay interbeds, gypsum U-Th dating, and carbon and oxygen isotopic analysis of carbonate clay, this study firstly reveals that the Dalangtan region underwent five climate stages around penultimate glaciation (MIS 6): relative cool-semiarid stage (>195.1 ka B.P.), frigid-arid stage (195.1 ~ 169.9 ka B.P.), relative cool-semiarid stage (about 169.9 ka B.P.), chilly-cold fluctuating stage (169.9 ka B.P. ~ 118 ka B.P.), and relative cool-semiarid stage (118 ka B.P.).