百色盆地东部百岗组砂岩显微特征与物源关系分析

碎屑岩骨架颗粒主要是由母岩的风化产物-碎屑物质构成的，骨架颗粒的显微特征可以揭示母岩的重要信息，也是研究物源的直接依据。根据大量钻井岩心和野外露头的薄片分析，对百色盆地东部坳陷北部陡坡带东段古近系百岗组砂岩的稳定组分及重矿物的特征、相对含量的变化趋势进行了详细分析，推断出百岗期属近物源沉积，母岩主要是沉积岩，其次为变质岩；沉积物由北东和北西两个方向的物源区供给。

The relationship analysis of the microscopic features and sources of Baigang formation sandstone in east Baise basin

The framework grains of clastic rock are formed by the weathering of parent rock and fragmentary material. The microscopic features of the framework grains can reveal the important informations of the parent rock, and are direct references of the source research. According to the quantity of drilling core and outdoor outcropping thin section analysis, this paper studies in detail  on the Baigang formation of the Paleogene sandstone steady compositions, features of heavy mineral, and the variation trend of the relative content at north actic region of the East Depression, the Baise basin, and deduces that the Baigang formation is a proximal source deposit, the parent rock is mainly sedimentary rock, and secondly metamorphic rock and the deposits are from the north east and north west sources.