摘要
槐树坪金矿是赋存于熊耳群缓倾斜层间挤压破碎带内的石英脉+蚀变岩型金矿床。热液成矿过程可划分为3个阶段:Ⅰ.乳白色石英脉-团块状黄铁矿阶段;Ⅱ.烟灰色石英脉-多金属硫化物阶段;Ⅲ.石英-碳酸盐脉阶段。对流体包裹体进行显微测温和拉曼光谱分析,研究表明,Ⅰ、Ⅱ成矿阶段石英中流体包裹体主要发育CO_2-H_2O型、纯CO_2型和NaCl-H_2O溶液型包裹体,Ⅲ成矿阶段石英中主要发育NaCl-H_2O溶液型包裹体,成矿Ⅰ阶段到Ⅲ阶段包裹体均一温度变化为189~439℃→145~351℃→145~267℃,盐度变化为6.98%~10.29%→2.03%~11.71%→2.89%~15.04%,成矿早阶段流体由中温、中低盐度H_2O-NaCl-CO_2体系向晚阶段低温、低盐度NaCl-H_2O体系演化。判定成矿流体来源于岩浆热液,具有深源特征。成矿流体中金主要以Au(HS)形式迁移,其次为Au_2(HS)_2S^(2-)。
The Huaishuping gold deposit is a quartz vein gold deposit, which was occurred in slowly inclined interlayer extrusion zone of Xionger Group. Hydrothermal ore forming process of this deposit can be divided into three stages： stage Ⅰmilky quartz vein phase crumb pyrite quartz vein, stage Ⅱsmoke gray polymetallic sulfide phase, and stage Ⅲquartz carbonate phase. Through the studies of fluid inclusion microscopic temperature measurement and Laser Raman spectra analysis, the results show that： three types of fluid inclusions in stage Ⅰ and Ⅱ are identified as CO2H2O type, pure CO2 and NaClH2O solution type,while stage Ⅲ quartz inclusions main contain the NaClH2O solution type. From the metallogenic stage Ⅰ to stage Ⅲ, the homogenization temperatures of fluid inclusions are 189~ 439℃→145~351℃→145~267℃, while their salinities are 6 98%~10 29%→2 03%~ 11 71%→2 89%~15 04%. The ore forming fluid was evolved from H2ONaClCO2 system,which is characterized by changing from medium temperature and medium low salinity to low temperature and salinity NaClH2O system. Its determined that the ore forming fluid was derived from magmatic hydrothermal, which has the characteristics of deep source. And then, its suggested that the ore forming fluid was mainly migrated in the form of Au （HS）, secondly by Au2（HS）2S2-.
出处
《西北地质》
CAS
CSCD
2017年第4期115-127,共13页
Northwestern Geology
基金
中国地质调查局科研基金"河南省熊耳山-外方山金多金属矿整装勘查区专项填图与技术应用示范"(12120114035401)
河南省"两权"价款项目科研基金"河南省嵩县东湾-槐树坪金矿床地球化学特征及找矿预测研究"(2014-17)资助
关键词
流体包裹体
槐树坪金矿
嵩县
河南
fluid inclusion
Huaishuping gold deposit
Song County
Henan Province
