【摘要】 研究了我国西南三江地区的地质构造背景和演化作用。利用地球化学块体理论的方法和技术确定了银的地球化学块体的下限和含量级次,对三江地区银元素的地球化学块体进行了划分。根据已知区(我国东部)的银矿探明储量与地球化学块体的关系,计算了成矿率并应用到三江地区,成功地预测了西南三江地区的银矿资源潜力。最后,将具有银矿成矿远景的地区集中到31个地球化学子块体内,预测这些子块体中的资源潜力为2.26万t,证明三江地区仍有很大的银资源潜力,为今后银矿的勘查工作指明了方向。更多还原

【Abstract】 The geological and structural background and evolution process in Sanjiang area of southwestern China were studied. The threshold and different concentration levels of geo-chemical blocks of silver in Sanjiang area were determined with geochemical methodology and technology and the blocks were delineated. The relations between geo-chemical blocks and the proven deposits of eastern areas with high prospecting degree were studied and the mineralization coefficients were calculated, which was used in Sanjiang area to forecast the potential reserve of silver. Finally, the most prospective targets were centered into 31 sub-blocks, obtaining a total potential reserve of 22. 6 kt. This result indicates that there’s still a large amount of potential silver reserve in this area, having provided a strategic guideline for further prospecting of silver deposits in the future.更多还原