WANG Bing¹, ZHU You-qing¹, LIN Gui-sheng^2*, WEI Chen³, CHEN Xing-long², XU Hui⁴, LI Kun⁵, WU Cai-jin⁵

(1. 1st General Team, Non-Ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou, Guiyang 551400, China;
2. Non-Ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou, Guiyang 550005, China;
3. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
4. Yunnan Luoping Zinc & Electricity Co., Ltd., Luoping 655800, China; 5. 104 Geological Team, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Duyun 558000, China)

Abstract: The Nayongzhi Pb-Zn deposit, located at the southeastern Wuzhishan anticline in the junction between the Puding and Zhijin counties in the central Guizhou, are composed of the Yuhe, Lumaolin, Jinpo, and Shayan 4 exploration licenses from northeast to southwest, with proved contained Pb+Zn metal reserves of 35.29×104 tons, 377.9×104 tons, 44.49×104 tons, and 53.29×104 tons, respectively, and the total Pb+Zn resource of 170.86×104 tons for the deposit in 2015. It is the first discovered large sized Pb-Zn deposit in Guizhou Province. Its discovery has changed the mineral exploration history of no large sized Pb-Zn deposit discovered in Guizhou Province. This study concludes the ore-forming background and geologic feature of Nayongzhi Pb-Zn deposit, introduces The discovery and exploration process of the Pb-Zn deposit can be divided to three partsand summarizes the experience of the process. The exploration process from the discovery of Pb-Zn mineralization clues to the proved contained Pb-Zn metal reserves of the Nayongzhi deposit has lasted three periods. The exploration work of the first period was mainly focused on the surface survey to discover the mineralization clues. The exploration work of the second period includes geologic survey, investigation of mineral occurrences in area and the engineering verification for discovering small fault-hosted orebodies. The exploration work of the third period was focused on the exploration of totally concealed, stably occurred, large-scaled, stratabound Pb-Zn orebodies after the change of exploration ideas. Based on the summary of metallogenic background and geological characteristics of the Nayongzhi large scaled Pb-Zn deposit, in this paper, we have introduced the discovery process of the deposit and summarized the experiences and lessons in the process of exploration of the deposit.

Keywords: The Wuzhishan anticline; the Nayongzhi large Pb-Zn deposit; the discovery process; Guizhou, China

ACTA MINERALOGICA SINICA Vol. 40, No.4, 2020, page 518-522