北京十三陵地区中侏罗统九龙山组硅质岩成因模式及地质意义

李昆鹏, 邢超超, 沈冰

Analysis of genetic model of siliceous rocks of the Middle Jurassic Jiulongshan Formation in Ming Tombs area in Beijing and their geological significance

Li Kun-Peng, Xing Chao-Chao, Shen Bing

北京十三陵地区九龙山组样品Al₂O₃含量和Ge/Si值散点图线条为SiO₂和黏土矿物的两端元混合图,每条线代表了不同的Si的来源