ZHENG Ming-hong1, JIN Zhong-guo1, LIU Ling1*, TANG Yong- yong2, GUN Ming-shan3, ZENG Dao-guo3

(1. Guizhou Nonferrous Metal and Nuclear Industry Geological Exploration Bureau, Guiyang 550005, China；
2. Stake Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy Sciences, Guiyang 550081, China；
3. Non-Ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou，Guiyang 550005, China)

Abstract: The northwestern Guizhou is an important part of the Sichuan-Yunnan-Guizhou Pb-Zn polymetallic ore concentration area. The Pb-Zn deposits in this area zonally occur along regional faults with orebodies controlled by faults and lithologies. Most of orebodies are of hidden high-grade ores with considerable economic values. Due to the shortcoming of the conventional geochemical survey for prospecting concealed mineral resources, the deep penetration geochemical prospecting methods (soil adsorption hydrocarbon and geoelectric extraction prospecting) have been applied for prospecting Pb-Zn resources in the deep parts of the Shanshuling, Xixiangou, and Qingshan Pb-Zn deposits in the area and good ore-prospecting results have been obtained in this paper. The results show that obvious anomalies of organic hydrocarbons (methane, ethane, propane, ethylene, etc.) and geoeletric extraction ions (Pb, Zn, AS, Sb, Hg) are significantly correlated with the concealed lead-zinc ore bodies. The geoelectric ion extraction has been successfully applied for prospecting concealed Pb-Zn orebodies in the periphery of the Qingshan Pb-Zn deposit. The anomalies of organic hydrocarbons have also been used to indicate the further direction of ore-prospecting in the deep part of the Shanshulin Pb-Zn deposit.

Keywords: Geochemical ore-prospecting; the deep penetration geochemical prospecting methods; deposit geology; the Pb-Zn metallogenic area; northwestern Guizhou

ACTA MINERALOGICA SINICA Vol. 40, No.4, 2020, page 510-517