地电化学测量在河台金矿找矿预测中的应用  

Application of Geo-Electrochemical Measurement to Prospecting in the Hetai Gold Deposit

作　　者：朱江建[1,2] 曾乔松[1] 易金[1,2] 龚朝阳[3] 李新福[3] 黄栋林[3] 王斯亮[3] 夏永健[4] 龚贵伦[1,2] 陈广浩[5] 林舸[1] 

机构地区：[1]中国科学院广州地球化学研究所中国科学院矿物学与成矿学重点实验室,广东广州510640 [2]中国科学院研究生院,北京100049 [3]广东河台金矿,广东高要526127 [4]中国瑞林工程技术有限公司,江西南昌330002 [5]中国科学院南海海洋研究所,广东广州510301

出　　处：《地质与勘探》2011年第5期894-902,共9页Geology and Exploration

基　　金：国家基础研究计划(973)项目资助(2007CB411402);高科技找矿方法在河台金矿的应用研究、中科院广州地化所创新项目(A15-030513)资助

摘　　要：为了获得更多的金资源储量,对河台金矿云西矿床进行了吸附电提取法地电化学测量研究。结果显示,已知含矿糜棱岩带上方的金测试值相对围岩有较明显的高异常;未知区上方的地电化学高异常特征与含矿糜棱岩带上方的地电化学异常特征相似;未知区的地电化学高异常带方位与矿区容矿构造方位一致。以上结果说明该方法在本区进行找矿预测可行。同时指出,应用地电化学测量进行找矿预测应考虑地电化学高异常带可能为非矿致异常,而非地电化学高异常区也可能含矿,并探讨了该两种情况发生的可能原因。此外,在研究区中圈定了3个地电化学高异常带,建议对非已知矿体所在的异常带进行验证。预测矿区已知的19号糜棱岩带在西端还有延伸,Ⅲ号地电化学高异常带25线以东有望实现找矿上的突破。Geo-electrochemical measurements using the absorption-electricity extraction method were carried out in the Yunxi deposit of the Hetai gold mine to obtain more gold reserves.The result shows that test values of gold above the known auriferous mylonitized zone are higher than that of the county rocks.The geo-electrochemical anomaly characteristics are similar to those above the auriferous mylontized zone.The azimuths of electrochemical anomalies in the unknown area are consistent with that of the ore-forming structures.It is thus concluded that the method is feasible for prospecting prediction in this area.When applying the absorption-electricity extraction method,we should consider the possibilities that the anomalous high value belt of geo-electrochemical values are not produced by ore bodies,while the area without geo-electrochemical anomalies can have ore.Possible reasons for these two cases were discussed.Further more,three high-anomaly belts of geo-electrochemical values in the study area were defined,and we suggest that the abnormal high value belts,which did not result from known ore bodies,should be checked.It was predicted that the mylonitized zone No.19 may extend to the west of the Yunxi deposit,and the belt with abnormally high geo-electrochemical values east of line No.25 is a potential area to find ore bodies.

关 键 词：吸附电提取法 糜棱岩带 地电化学高异常带 河台金矿 

分 类 号：P622.2[天文地球—地质矿产勘探] P622.3[天文地球—地质学]