• 责任者：Fu Wei (Guangxi Scientific Experiment Center of Mining Metallurgy and Environment ; Guilin University of Technology ; Guilin 541004 ; China) ; Chai Mingchun
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(12)
• 关键词：铅锌矿床 ; lead-zinc deposit ; 多金属矿 ; polymetallic ores ; 流体包裹体 ; fluid inclusions ; 广西 ; Guangxi Province
• 页码：p.4136-4150
• 图表：11 illus., 6 tables, 96 refs.
• 分类号：1001
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     The Fozichong ore district, located in the southern segment of the Qinghang metallogenic belt, is a large-sized Pb-Zn polymetallic deposit in South China. This study presents new data on fluid inclusions and H-O-S-Pb isotopic compositions from the ore bodies in the Guyi deposit of the Fozichong ore district. Analysis of the fluid inclusions reveal that the early sulfide-forming stage （Stage I） is characterized by various types of the fluid inclusions, including the daughter mineral containing type, the CO2-H2O type and the H2O type, but both the main sulfide-forming stage （Stage Ⅱ） and the late sulfide-forming stage （Stage Ⅲ） are dominated by the H2O type. From the early to the late stage, the ore-forming fluids were changed from high-moderate temperature and high salinity to moderate-low temperature and low salinity. Hydrogen isotopic compositions （δD from -59 to -41）, oxygen isotopic compositions （δ18OH2O from -5.47 to 4.00） and chemical components of the fluid inclusions indicate the initial ore-forming fluids were sourced from the magmatic fluid, and mixed with the meteoric water in later process. Sulfur isotopic compositions （δ34S from 2.3 to 4.3） indicate that the sulfur was mainly derived from the felsic magmatic system. The Pb isotopic compositions （206Pb/204Pb of 18.592~18.794, 207Pb/204 Pb of 15.648~15.864, 208Pb/204Pb of 38.909~39.580） reveal that the ore-forming metals were sourced from both the felsic magmatic system and the country rock strata. The formation of the Fozichong Pb-Zn deposit has close association with the granite porphyry intruded in the Late Yanshanian Period （106Ma）, and it can be classified as the magmatic-hydrothermal type Pb-Zn deposit. The Hesan and Guyi ore deposits in the Fozichong ore district represent products of the near-source high-moderate temperature magmatic hydrothermal mineralization and the far-source moderate-low temperature hydrothermal mineralization, respectively.