Characteristics of Ore-Forming Fluids of the Leimengou Porphyry Mo Deposit, Western Henan Province, and Its Geological Significance

详细信息   

• 责任者：Chen Xiaodan (Faculty of Earth Science and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Ye Huishou
• 刊名：Acta Geologica Sinica
• 出版年：2011
• 卷期：85(10)
• 关键词：斑岩钼矿床 ; porphyry molybdenum deposit ; 成矿流体 ; ore-forming fluids ; 河南 ; Henan Province
• 页码：p.1629-1643
• 图表：11 illus., 4 tables, 56 refs.
• 分类号：1001
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

摘要

Leimengou Mo deposit is one of the classic porphyry Mo deposits in the eastern Qinling molybdenum belt.  Mineralized types contain dissemination and multistage stockworks. Based on intersection and overprinting relationships of veins throughout the deposit, hydrothermal mineralization process at Leimengou can be divided into four stages：1) K-feldspar stage;  2) quartz-K-feldspar stage;  3) quartz-molybdenum stage; and 4)  quartz-carbonate stage. Combined with characteristics of fluid inclusions and paragenesis of mineral assemblages, it is suggested that fluid immiscibility and decreasing of pH and oxygen fugacity were the leading factor for the formation of the deposit.