【摘要】 江南造山带为金多金属复合成矿带,其矿床成因备受关注。坑头金矿位于江南造山带西南缘,矿床成矿流体来源及性质存在较大争议。文章通过大量野外调查及室内显微镜下观察以及采用电感耦合等离子质谱仪(ICP-MS)对坑头金矿近矿围岩和石英脉测试分析研究得出:坑头金矿床的成矿流体具有多来源的特征,成矿流体主要来源于区域变质作用过程中产生的变质热液。石英脉的稀土和微量元素特征表明其形成于相对还原的环境,成矿物质来源于深部,成矿流体有成矿后期遭到大气降水的加入。结合矿床地质特征,认为坑头金矿床为造山型变质热液型矿床。更多还原

【Abstract】 The Jiangnan orogenic belt gold multi metal metallogenic belt, its genesis has attracted much attention. There is still much controversy about the source and nature of ore-forming fluids of Kengtou gold deposit is located in the southwestern margin of the Jiangnan orogenic belt.,In this paper, through a large number of field investigations, indoor microscopic observation and the application of inductively coupled plasma mass spectrometer(ICP-MS) to study the surrounding rock and quartz vein of the Kengtou gold deposit,it is found that the ore-forming fluid of the Kengtou gold deposit is characterized by multiple sources, and the ore-forming fluid mainly originates from the process of regional metamorphism. Metamorphic hydrothermal solution. The characteristics of the rare earth and trace elements of quartz vein indicate that it is formed in the environment of relative reduction, and the metallogenic material is derived from the deep, and the ore-forming fluid has been added to the meteoric water during the later period of mineralization. According to the geological characteristics of the deposit, the Kengtou gold deposit is an orogenic metamorphic hydrothermal deposit.更多还原