摘要
石门超大型雄黄矿床流体包裹体丰富。包裹体液相成分中富Na+、Cl-和K+、SO2-4,气相成分中H2O占绝对优势,少量CO2,成矿流体化学类型属ClSO4NaK型水。雄黄、雌黄形成于低温(180~90℃)、低压(20~5MPa)、浅成(175~700m)、弱酸性(pH:4.67、4.43)和弱还原(Eh:-0.265V)条件。流体包裹体氢氧同位素研究表明,成矿流体主要为古大气降水,并混有盆地建造水,大气降水下渗、循环、加热、淋滤形成了中-低盐度[w(NaCl):16.03%~4.27%],中等密度(0.863~1.065g/cm3),含矿地下热水。
The super large sized realgar deposit in Shimen,Hunan,is distinguished by numinous fluid inclusions consisting of liquid phase rich in Na +,Cl -,K + and SO 4 2- and vapor phase comprised of prevailing H 2O and lesser CO 2. Mineralizing fluids fall chemically into a Cl SO4 Na K type water whose precipitations as reagar and orpiment needed lower temperature (180~90℃),lower pressure(20~5MPa),smaller depth (175~700m), slighter acidity (pH:4.67, 4.43) and slighter reduction (Eh=-0.265V). H and O isotopic studies of fluid inclusions suggest that the mineralizing fluids were made up chiefly of paleometeoric water, later mixed with a certain amount of basin formational water and that they could become ore bearing hydrothermal solutions characteristic of low moderate salinity [ W (NaCl)= 16.3% ~ 4.27% ) and moderate density (0.863~1.065g/cm3) only after downward percolating, convecting, being heated and being leaching.
出处
《化工矿产地质》
CAS
1997年第3期183-188,共6页
Geology of Chemical Minerals
关键词
黄铁矿矿床
液包体
地球化学
fluid inclusion, physicochemical conditions for mineralization, paleometeoric water, Shimen realgar deposit