DU Li-juan1,2, HUANG Zhi-long1, LI Bo3*, ZHOU Jia-xi1, ZOU Guo-fu4, YAN Zai-fei1, Sun Hai-rui5
(1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China;
4. Yunnan Copper Group, Kunming Prospecting Design Inst China Nonferrous, Kunming 650051, China; 5. Development Research Center of China Geological Survey, Beijing 100037, China)
Abstract: Yangla Cu deposit is the most representative deposit in Jinshajiang tectonic belt. Its orebodies are obviously controlled by fault and interformational fracture zones. This study focuses on the tectono-geochemistry of the junction area between Linong and Lunong ore sections, and shows three element associations, i.e., the strata rock elements (Nb, Hf, Ta, Zr, Rb, V, Sc, Th, Cs, Be, Ga, Li, REE, Ba, Cr, U, Co, Tl, Ge and (Ag, In, Sn, Cu)), medium-high temperature ore-forming elements (Cd, Pb, Bi, Ag, As, Sn, In, Sb, Cu, Zn, Ge, Tl, Mo, U and (Co, Ga)) and elements with unclear geological implication (Ni and Sr), based on cluster and factor analyses. This result indicates that Yangla orebodies formed mainly by retrograde skarn alteration in the ore stage, and the ore-forming elements probably enriched in the pre-ore stage. Besides, the distribution of tectonic geochemical anomalies provides a target for further exploration engineering.
Keywords: tectono-geochemistry; prospecting prediction; Yangla Cu deposit; SW China
E-mail：libo8105@qq.com
ACTA MINERALOGICA SINICA Vol. 37, No. 4, 2017, Page 434-442
