The feasibility of applying hydrocarbon-mercury gas measurement method in the prospecting of sedimentary copper deposits in Central Africa
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摘要: 沉积型铜矿是中非铜—钴成矿带最主要的铜(钴)成矿类型,为提高该类矿床的找矿效果,在刚果(金)马本德—利卡西一带开展烃汞气体测量法找矿可行性研究。试验结果表明,在两处已知矿体上均有较好的烃汞多指标异常显示,但异常分布位置受控于矿体的产状,据此总结了烃汞气体异常模式,并初步探讨其成因;在该地区开展了隐伏铜(钴)矿找矿预测,圈定的找矿有利靶区经钻探验证发现了一处工业铜矿体,取得了一定的找矿效果。Abstract: Sedimentary copper deposits are the predominant type of copper (cobalt) mineralization in the Central African copper-cobalt metallogenic belt. To improve the prospecting efficiency of such deposits, the feasibility of applying the hydrocarbon-mercury gas measurement method in the prospecting of sedimentary copper deposits was studied in the Mabende-Likasi area of the Democratic Republic of Congo. As indicated by the test results, two known ore bodies show remarkable anomalies of multiple indicators of hydrocarbon and mercury, but the anomaly distribution is controlled by the occurrence of orebodies. Based on these findings, this study summarized the anomaly pattern of hydrocarbon-mercury gas and primarily explored the anomaly causes. Moreover, this study conducted the prospecting prediction of concealed copper (cobalt) deposits in the study area. An industrial copper orebody was discovered through drilling in the delineated favorable target area, thus achieving achieved prospecting results.
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