贺兰山—六盘山地区中侏罗统直罗组地球化学特征及其地质意义*
罗伟, 刘池洋, 张东东, 王建强, 牛海青, 郭佩

Geochemistry characteristics of the Middle Jurassic Zhiluo Formation in Helan Mountain-Liupan Mountain area and their geological significances
Luo Wei, Liu Chiyang, Zhang Dongdong, Wang Jianqiang, Niu Haiqing, Guo Pei
贺兰山—六盘山地区直罗组细粒碎屑沉积物La/Yb-ΣREE源岩判别图(a)(据 Allègre 和 Minster,1978 )与La/Th-Hf源岩特征判别图(b) (据 Floyd 和 Leveride,1987 )