南秦岭地区水沟口组黑色岩系地层地球化学特征及其找矿意义
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Jun YOU, Hong-Yuan CAO, Feng-Jun ZHANG, Wen-Chun CAI, Jing-Chen LI, Peng-Tao SHE
图3 水沟口组各元素R型聚类分析谱系(n=149)