库车坳陷膏岩沉积特征及形成环境分析

Analysis on sedlmentary characteristics and environment of gypsolytes in Kuqa depression

库车坳陷是塔里木盆地的一个大型坳陷区,蒸发岩广泛分布,硫酸盐矿物是蒸发岩中最常见的矿物之一,其中石膏矿物是分布最为广泛的硫酸盐矿物。研究表明,不同蒸发岩岩相中产出的石膏矿物类型多样,产状、沉积构造复杂多变,不同的原生石膏矿物组合指示着不同的沉积相和沉积环境,利用岩矿鉴定方法分析石膏沉积特征与形成环境。

Kuqa depression is a large secondary structural units of Tarim basin, with many evaporites. Sulfate minerals are common evaporites, and gypsum is the commonest kind of sulfate minerals. The type, occurrence, sedimentary structure and mineral association of gypsum is always different in different sedimentary facies. So that we can analyze sedimentary characteristics and environment of gypsolytes by identification of rock and minerals.