黔中瓮安早震旦世磷块岩的形成环境及成因机制*
杨海英1,2, 肖加飞1, 胡瑞忠1, 夏勇1, 何洪茜1,2

Formation environment and metallogenic mechanism of Weng'an phosphorite in the Early Sinian,Central Guizhou Province
Yang Hai-Ying1,2, Xiao Jia-Fei1, Hu Rui-Zhong1, Xia Yong1, He Hong-Xi1,2
瓮安陡山沱组磷块岩(a)及围岩(b)稀土元素NASC标准化稀土元素配分图