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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 clastic skeleton particles are mainly composed of the weathering products of the parent rock - clastic matter. The microscopic features of the skeleton particles can reveal the important information of the parent rock and also serve as a direct basis for the study of provenance. Based on the analysis of thin sections of a large number of drilling cores and outcrops in the eastern part of the eastern steep slope in the eastern part of the eastern depression of the Baise Basin, the stable compositions of the Baigang Formation sandstone in the eastern part of the Baigou Formation and the trend of the relative content of heavy minerals are analyzed in detail. The Baigang period is near-provenance sedimentary. The parent rocks are mainly sedimentary rocks, followed by metamorphic rocks. Sediments are supplied from provenance in both north east and north west.