SEM-EDS Investigation of Daughter Minerals of Fluid Inclusions at the Dexing Porphyry Cu-Mo Deposit, Jiangxi Province , China
详细信息
- 责任者：Liu Xuan (Key Laboratory of Mineral Resources ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Fan Hongrui
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(5)
- 关键词：斑岩铜矿床 ; porphyry copper deposit ; 斑岩钼矿床 ; porphyry molybdenum deposit ; 成矿流体 ; ore-forming fluids ; 江西 ; Jiangxi Province
- 页码：p.1397-1409
- 图表：5 illus., 1 table, 39 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
On the basis of microscopic investigation of the vein (and rock) mineral assemblages and fluid inclusion petrology,Scanning Electron Microscopy and X-ray Energy Dispersive Spectrum (SEM-EDS) were employed in identification of the solid phases in fluid inclusions. The results suggest that 1) transparent daughter minerals in Q+Py±Cp±Cc veins include sericite, halite, bischofite, dolomite, iron-bearing chlorides, apatite and Ce-bearing phosphates, and opaque phases consist of hematite, iron-bearing oxides and chalcopyrite; 2) transparent daughter minerals in phyllic rocks include halite,anhydrite, gypsum, sericite, magnesium sulfate, magnesite, magnesium chloride, (Fe,Cu,Mg) carbonate and sulfate, while opaque phase include hematite, magnetite, rutile and chalcopyrite; and 3) daughter minerals in Q+Py+Mo±Cp veins are far less developed, which include halite,siderite and K-feldspar for the transparent daughters and hematite for the opaque ones. Finally, monazites and Ce-bearing phosphates in the fluid inclusions of Q+Py±Cp±Cc veins suggest that hydrothermal fluids forming these veins are hypersaline, acidic and CO2-bearing. Separation of CO2 from the liquid phases is likely to account for the absence of the Ce from the fluids of phyllic rocks and Q+Py+Mo±Cp veins.