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四川盆地三叠纪蒸发岩系普遍含碳酸盐组分 ,除方解石、白云石外 ,常出现大量菱镁矿。三种碳酸盐矿物的分布 ,可反映出盆地海水浓缩程度 ,进而分析成盐盆地浓缩淡化发展进程 ;可作为纵、横向蒸发岩系剖面成盐相的对比标志
The Triassic evaporites in the Sichuan Basin generally contain carbonate components. In addition to calcite and dolomite, a large amount of magnesite often occurs. The distribution of the three carbonate minerals can reflect the degree of seawater concentration in the basin, and then analyze the process of concentration and desalination in the salt basins. It can be used as a contrast marker for salt-facies profiles in vertical and horizontal evaporite series