烃汞气体测量法在中非沉积型铜矿的找矿可行性研究

doi:10.11720/wtyht.2023.2565

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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。

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	黄学强
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关键词 ：烃汞气体测量法, 沉积型铜矿, 找矿, 可行性研究

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.

Key words： hydrocarbon-mercury gas measurement method sedimentary copper deposit prospecting feasibility study

收稿日期: 2021-10-14 修回日期: 2022-04-12 出版日期: 2023-02-20

ZTFLH:

P632

基金资助:桂矿院创新基金项目“中非卢弗里安铜钴成矿带西延成矿地质条件及成矿潜力评价”(KDY2019002)

作者简介: 黄学强(1987-),男,硕士,工程师,主要从事勘查地球化学工作。Email:505837684@qq.com

引用本文:

黄学强, 陈远荣, 吴二, 刘峰, 卢安宁. 烃汞气体测量法在中非沉积型铜矿的找矿可行性研究[J]. 物探与化探, 2023, 47(1): 31-38.
HUANG Xue-Qiang, CHEN Yuan-Rong, WU Er, LIU Feng, LU An-Ning. The feasibility of applying hydrocarbon-mercury gas measurement method in the prospecting of sedimentary copper deposits in Central Africa. Geophysical and Geochemical Exploration, 2023, 47(1): 31-38.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2023.2565 或 https://www.wutanyuhuatan.com/CN/Y2023/V47/I1/31

Fig.1 卢弗里安成矿带铜—钴成矿带交通位置

Fig.2 研究区区域地质图
1—湖面;2—第四系;3—孔德龙古群;4—恩古巴群;5—木瓦夏群;6—下罗恩亚群;7—地质界线;8—断层;9—中型以上铜(钴)矿床及名称;10—研究区范围(试验区+预测区)

Table 1 试验区烃汞组分地球化学参数

Fig.3 BD矿区2680线地质—烃类异常剖面
1—浮土层;2—孔德龙古群砂质、页岩夹白云岩;3—硅化白云岩;4—泥质/白云质页岩;5—下罗恩亚群(R1)非均质(杂)角砾岩;6—实测/推测地质界线;7—实测/推测断裂;8—已施工钻孔及编号;9—铜矿体

Fig.4 马本德矿区P2线地质—烃类异常剖面
1—冰川混积岩(小砾岩);2—白云岩化砂岩、粉砂岩或页岩;3—罗恩群(R3)白云岩、白云岩化粉砂岩;4—铜矿体;5—实测/推测地质界线;6—断裂

Fig.5 凯义矿区04线地质—烃类异常剖面
1—第四系红土层;2—滑石质粉砂岩;3—硅化粉砂岩;4—硅质页岩夹层泥质岩;5—白云质页岩、泥质粉砂岩;6—孔德龙古群粉砂岩、页岩;7—实测/推测地质界线;8—实测/推测断裂;9—验证钻孔及编号;10—工业铜矿体

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