赣南梨坑金矿矿化分布规律及找矿方向浅析

Brief analysis on mineralization distribution and prospecting direction of Likeng gold deposit in south jiangxi

通过对梨坑金矿的地球化学测量、硐探、钻探等手段和样品综合分析研究,认为北西向构造和煌斑岩脉是控制金矿化的主要因素;矿石组合以褐铁矿石英脉,多金属硫化物石英脉、黄铁矿石英脉为主;载金矿物地表为褐铁矿,浅深部为黄铁矿和石英,98%以上的金呈超显微包体金形式存在于黄铁矿、石英中,褐铁矿内的金则大部分呈胶体、离子吸附金为主;与金伴生的元素由地表至深部具有垂直分带性,并呈独立矿体或达到综合利用的价值,总结出垂向上Ag/Au<5.5时,为金成矿的有利区段;阐明了金矿化分布规律,找矿标志及指明了找矿方向。

By means of geochemical survey,adit exploration and drilling and comprehensive analysis of samples of Likeng gold deposit,it is concluded that the NW structure and lamprophyre vein are the main factors controlling gold mineralization.The ore assemblage is dominated by limonite quartz veins,polymetallic sulfide quartz veins and pyrite quartz veins.The surface of the gold-bearing object is limonite,while the shallow and deep part is pyrite and quartz.More than 98%of the gold is in the form of ultramicroscopic inclusion gold in pyrite and quartz,while most of the gold in limonite is in the form of colloid and ion adsorption gold.The elements associated with gold have vertical zonal character from the surface to the deep,and show independent orebody or value of comprehensive utilization.It is concluded that when vertical Ag/Au<5.5,it is a favorable area for gold mineralization.The distribution rule of gold mineralization,ore prospecting mark and ore prospecting direction are expounded.