WANG Fu-dong1,2, ZHU Xiao-qing1, HAN Tao1,2, WANG Zhong-gang1
（1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China）
Abstract: This study selected deferent minerals from Emeishan basalt-related native Cu deposits in the Sichuan-Yunnan-Guizhou area for colloid Cu and Cu2+ solution adsorption investigations under room temperature and neutral pH conditions. Adsorption rate of colloid Cu and Cu2+ solution by different minerals decreases according the order of sulfides, organic matters (bitumen), clay minerals and silicates. The adsorption result is consistent with the fact that native Cu in the Sichuan-Yunan-Guizhou area is mostly hosted in basaltic breccias and aluminous-clayey sedimentary rocks. Native Cu is generally associated with organic matters, which are ideal adsorbent, indicating reducing conditions during ore forming stage. This study also discussed Cu migrating ways in the Emeishan basalt-related Cu deposits. Cu can migrate not only in forms of ions or complexes, but also in nanometer-level simple substances.
Key words: Emeishan basalt; native copper; nano; genesis of ore deposit; adsorption experiment
E-mail: zhuxq@sohu.com
ACTA MINERALOGICA SINICA Vol. 31, No. 3, 2011, Page 322-327
