摘要
水银洞金矿床是黔西南典型的特大型卡林型金矿床之一。但其成矿流体来源尚有争议。通过对水银洞金矿床脉石英和方解石中流体包裹体的温度与压力、盐度与密度、包裹体成分和包裹体H和O同位素等方面的研究,指出水银洞卡林型金矿床成矿流体属中低温（96.7220℃）、低盐度（NaCl）0.635%9.861%,平均值为4.282%±2.260%、中等密度（0.7250.977 g/cm3,平均值为0.910±0.061 g/cm3）;脉石英阶段流体水化学类型属Cl--Na＋型或SO42--Cl-Na＋型,方解石阶段属SO42--Cl--Ca2＋型。成矿流体压力可能为高-超高压（160±40 MPa）;成矿流体主要是大气降水形成的地下热水,可能有部分岩浆热液的掺入。
The Shuiyindong gold deposit is one of the largest typical Carlin-type gold deposits.The gold deposit locates at about 20 km NW of the downtown Zhenfeng County in southwestern Guizhou Province,China.This paper studied temperature,pressure,salinity,composition and oxygen-hydrogen isotope compositions of fluid inclusions in quartz and calcite inclusions in veins of the gold deposit.Study results indicated that the ore-forming fluid of the Shuiyindong gold deposit belongs to low-medium temperature（96.7～220℃）,low salinity（l4.282%±2.260 % of NaCl） and medium density（0.910 ±0.061 g/cm3） fluid.The hydrochemical type of the fluid inclusions found in quartz inclusions belongs to Cl——Na＋ or SO2-4-Cl-Na＋ type,while the hydrochemical type of the fluid inclusions found in calcite inclusions belongs to SO2-4-Cl——Ca2＋ type.The ore-forming fluids with a pressure from high to super high（160±40 MPa） mainly originated from subsurface hydrothermal water,probably,immingled with certain parts of magmatic-hydrothermal water.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2010年第1期45-51,共7页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
矿物学岩石学矿床学国家重点(培育)学科建设项目(SZD0407)资助
关键词
流体包裹体
成矿流体
卡林型金矿床
贵州水银洞
fluid inclusions
ore-forming fluid
Shuiyindong gold deposit
southwestern Guizhou
