Study on Process Mineralogy of a Refractory Gold Ore

• Published in: Kuangchan Zonghe Liyong Vol. 43; no. 5; pp. 194 - 199
• Main Authors: Mingming Cai, Wenping Zhang, Chao Xu, Guangsheng Li, Fabo Huang, Xingfu Zhu
• Format: Journal Article
• Language: Chinese
• Published: Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences 01.10.2022
• Subjects: altered gold deposit; disseminated grain size; occurrence state; process mineralogy
• ISSN: 1000-6532
• DOI: 10.3969/j.issn.1000-6532.2022.05.033

Part of a gold deposit belongs to altered type gold deposit. The gold bearing alteration zone is composed of sericite, silicification and pyritization caused by hydrothermal alteration of granite. Most of the ore bodies are hosted in pyrite sericite and some in pyrite sericite granite. Using optical microscope, mineral analysis system (BPMA), scanning electron microscope and energy spectrum, the process mineralogical characteristics of minerals were analyzed. It was found that sulfide ore was the main ore and the depth of oxidation zone was very shallow. The gold grade is 5.23 g/t. The main gold minerals are natural gold and silver gold. The main metal minerals are pyrite, pyrrhotite, galena, chalcopyrite, sphalerite and other sulfide minerals and magnetite and other oxide minerals. Gangue minerals mainly include quartz, sericite, feldspar, etc. The size of gold is fine, all of which are below 37 μm. According to the occurrence state of gold minerals, the content of gold bearing minerals existing in monomer f