A Mineralogical Record of Brine Evolution and Environmental Change from Da Qaidam Salt Lake in the Northern Qaidam Basin
详细信息
- 责任者：Gao Chunliang (Institute of Salt Lake Studies ; Chinese Academy of Sciences ; Xining 810008 ; China) ; Zhang Lisa
- 刊名：Geochimica
- 出版年：2011
- 卷期：40(2)
- 关键词：盐湖 ; salt lakes ; 卤水 ; brines ; 矿物学 ; mineralogy ; 柴达木盆地 ; Qaidam Basin
- 页码：p.156-162
- 图表：3 illus., 1 table, 14 refs.
- 分类号：1002
- issnNo：ISSN0379-1726
- isbnNo：CN44-1398/P
摘要
Da Qaidam Salt Lake is known for its both liquid and solid boron resource. In the paper, the authors report the result of AMS 14C dating and mineralogical investigation on a subbottom sediment section from the central area of the saline water-body. The result reveals that the subbottom pinnoite deposit was formed before 3 600 a B.P., and that the lake underwent three stages of lake–levels and brine evolution in the Late Holocene, which were determined mainly by precipitation-controlled catchment inflow. The mineralogical records also depict fluctuations in lake-levels and water chemistry on decadal and centennial scales. The data provide a proxy record for the reconstruction of the Late Holocene hydro-climate change on the northern Qaidam Basin.
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