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基于安曼金矿床地处马来西亚半岛吉兰丹州西南部,矿体呈脉状赋存于二叠—三叠系浅变质火山—沉积岩系内,并受断裂控制。对安曼金矿床流体包裹和群体成分进行研究。研究研究表明:安曼金矿床各成矿阶段金矿石中主要发育CO2-H2O包裹体及气液两相H2O包裹体,早期阶段主要以CO2-H2O包裹体为主,主成矿阶段CO2-H2O包裹体及气液两相H2O包裹体均有发育,后期多为气液两相H2O包裹体。成矿流体的均一温度、盐度在早阶段分别为248~352℃和1.6%~8.8%,主成矿阶段分别为185~336℃和0.43%~11.6%,晚阶段分别为118~226℃和2.9%~5.1%;包裹体气相成分以H2O和CO2为主,并含有少量CH4和H2;包裹体液相成分中阳离子以Na+,K+和Ca2+为主,阴离子以Cl-,SO42-和F-为主。据沸腾包裹体群的均一温度推测主成矿阶段成矿温度为230~326℃。安曼金矿床成矿流体总体表现为低盐度、富CO2的中低温流体,主成矿阶段流体不混溶作用引起成矿流体中的CO2相分离是促使金沉淀的直接因素。安曼金矿床形成与二叠—三叠纪时期马来半岛中缅马苏陆块和印支陆块间的碰撞造山机制有关,属于造山型金矿床。
Based on the fact that the Amman gold deposit is located in the southwestern Kelantan, Peninsular Malaysia, the ore bodies are vein-like in the Permian-Triassic epithermal volcanic-sedimentary rock series and controlled by faults. The fluid inclusions and population composition of the Amman gold deposit are studied. The research shows that the main ore-forming CO2-H2O inclusions and gas-liquid two-phase H2O inclusions in the ore-forming stages of the Amman gold deposit mainly include CO2-H2O inclusions in the early stage and CO2-H2O inclusions in the main metallogenic stage Body and gas-liquid two-phase H2O inclusions are developed, the latter mostly for the gas-liquid two-phase H2O inclusions. The average temperature and salinity of the ore-forming fluids are 248 ~ 352 ℃ and 1.6% ~ 8.8% in the early stage, 185 ~ 336 ℃ and 0.43% ~ 11.6% in the main stage and 118 ~ 226 ℃ in the late stage And 2.9% -5.1% respectively. The gas inclusions are mainly composed of H2O and CO2 with a small amount of CH4 and H2. Among the components in the liquid phase, the inclusions are mainly composed of Na +, K + and Ca2 + and the anions are Cl-, SO42- and F - based. According to the homogenization temperature of the boiling inclusions, it is speculated that the metallogenic temperature of the main mineralization stage is 230 ~ 326 ℃. The ore-forming fluids in the Amman gold deposit are generally characterized by low-salinity and CO2-rich medium-low temperature fluids. The immiscibility of fluids in the main metallogenic stage causes the CO2 phase separation in the ore-forming fluid to be the direct factor that promotes gold precipitation. The formation of the Amman gold deposit is related to the collision orogenic mechanism between the Masulu and the Indo-Chinese blocks in the Permian and Triassic periods in the Malay Peninsula, and belongs to the orogenic gold deposit.