矿物地球化学勘查方法在鄂东南地区深部找矿中的初步应用

Application of the Mineral Geochemical Exploration Methods of the Deep Prospecting in the Edongnan Ore District

矿物地球化学勘查是目前国际上新兴的矿产勘查方法之一,主要运用于斑岩型和浅成低温热液矿床以及火山成因块状硫化物矿床(VMS)中,而在其它类型矿床中运用较少。鄂东南地区是中国东部著名的矽卡岩型铜铁金成矿密集的大型矿集区,区内产有铜绿山、鸡冠咀、程潮、铁山、铜山口、金山店、阮家湾等大型矽卡岩矿床。简要介绍铜绿山铜铁金矿床和鸡冠咀铜金矿床近年来的深部勘查进展,通过野外钻孔岩芯编录、蚀变矿物SWIR填图及光谱特征参数以及绿泥石化学成分组成等研究,初步建立铜绿山矿床和鸡冠咀矿床的新矿物勘查标志体系,并初步应用于铜绿山矿区深部矿体的勘查和验证工作,取得了良好的效果,认为在鄂东南地区大型矿区深部和边部,沿着有利的控矿构造部位,特别是矽卡岩化和粘土矿化蚀变增强的空间位置仍具有较大找矿潜力。

The Mineral Geochemical Exploration(MGE)is one of the burgeoning ore exploration methods in the world.It is mainly used in the porphyry-and epithermal deposits and volcanogenic massive sulfide(VMS)deposits,but less applied in the other types of deposit.The Edongnan area is a famous large-scale ore district with concentrated Cu,Fe and Au skarn mineralization in eastern China.Large scales skarn deposits such as Tonglvshan,Jiguanzui,Chengchao,Tieshan,Tongshankou,Jinshandian and Ruanjiawan etc.are occurred.In this study,it mainly introduced the deeping exploration progress at the Tonglvshan Cu-Fe-Au deposit and Jiguanzui Cu-Au deposit in the recent years,then,through the study of field drilling core cataloging,altered mineral SWIR mapping and spectral characteristic parameters of alteration minerals and chemical composition of chlorite,the authors initially applied it to the exploration and verification of the deep ore bodies in the Tonglvshan mining area and achieved good results.In the Edongnan area,it has still a large potential for prospecting in the deep and marginal areas of the large skarn deposit,especially along the favorable ore-controlling structure and the spatial position with intensive skarn and clay alteration.