Evaporative Minerals of the Upper
详细信息
- 责任者：Li Minghui (Institute of Tibetan Plateau Research ; Chinese Academy of Sciences ; ITPCAS ; Beijing 100085 ; China) ; Yi Chaolu
- 刊名：Acta Sedimentologica Sinica
- 出版年：2010
- 卷期：28(6)
- 关键词：石盐 ; halite ; 柴达木盆地 ; Qaidam Basin
- 页码：p.1213-1228
- 图表：9 illus., 1 table, 40 refs.
- 分类号：1002
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Qaidam Basin is a tectonically controlled depression on the northern margin of the Tibetan Plateau. In 2008, a long core was drilled in Qahansilatu sub-basin in the western Qaidam Basin. The sediment layers in the upper 400 m alternate between evaporative mineral layers and carbonaceous clay layers. The detailed mineralogical investigation focused on evaporative minerals including halite, gypsum, mirabilite, thenardite, glauberite, eugsterite, bloedite, barite, cesanite, shortite, thermonatrite, gaylussite, nahcolite and inderborite. Gypsum and halite make up the majority of the evaporative minerals. Environmentally induced variations in the mineralogy and crystal habit of the sulfates have been extensively investigated. The evaporate-rich stages suggested that evaporation was high and groundwater inflow was sufficient at the subbasin.