PRELIMINARY STUDY ON SEDIMENTARY CHARACTERISTICS AND EVOLUTION OF PALAEOCLI MATE OF QARHAN SALT LAKE IN QAIDAM BASIN

作     者：陈克造 J.M.BOWLER CHEN KEZAO(Salt Lake Institute, Academia Sinica, Xining) AND J. M. BOWLER(Australian National University)

作者机构：Salt Lake Institute Academia Sinica Xining Australian National University 

出 版 物：《Science in China,Ser.B》 (中国科学B辑(英文版))

年 卷 期：1985年第28卷第11期

页      面：1218-1232页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：PRELIMINARY STUDY ON SEDIMENTARY CHARACTERISTICS AND EVOLUTION OF PALAEOCLI MATE OF QARHAN SALT LAKE IN QAIDAM BASIN 

摘      要：Qarhan salt lake which covers an area of 5800 square kilometres is a large playa in Qaidam basin, Qinghai Province. The salt-bearing layers are usually 40 m thick, the maximum thickness being 73 *** sedimentation of the lake has the following basle characteristics: (1) The salt-containing layers are principally composed of interbedded halite and clastic sediments, and they are either lacking in sulfate deposits or deficient in carbonate sediments. (ii) The sedimentary differentiation is not sufficient, and all of the halite layers almost contain mud, sand, carbonates and gypsum in varying degrees; there exist mixtures of gypsum and halite in the intercalations of clastic sediments. (iii) The salt-carrying beds are associated with aeolian deposits. The authors found for the first time that Malan loess exists in the salt-bearing layers of Qarhan salt *** of evolution of palaeoclimate: A lot of evaporite deposits had appeared in Qarhan salt lake by the end of Late Pleistocene, 24,000—25,000 ye