Sedimentary Features, Origin and Paleoenvironmental Significance of "Great Ear" Salt Pans in the Lop Nor Playa
详细信息
- 责任者：Ma Lichun (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Li Baoguo
- 刊名：Acta Sedimentologica Sinica
- 出版年：2011
- 卷期：29(1)
- 关键词：盐湖 ; salt lakes ; 地貌 ; landforms ; 沉积环境 ; sedimentary environment ; 罗布泊 ; Lop Nor
- 页码：p.125-133
- 图表：5 illus., 26 refs.
- 分类号：1400
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
The majority of present-day evaporite deposition occurs in arid closed continental basins in which the playa lake is most common. The distribution of evaporite minerals and sedimentary features of salt crust are usually zonal in a playa lake. The research also gives a general overview of the sedimentary features in different cycles of salt-pan evaporite, as well as the relationship between the development of polygonal fissure structures of salt crust and the groundwater brine table. The types of salt-crust structure include polygon crack, well-developed honeycomb-shaped halite crusts, mound-shaped pattern and plate-shaped halite crusts. However, the sediment beneath the surface is typically saturated with concentrated brines and displacive evaporites.
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