黄金科学技术 ›› 2019, Vol. 27 ›› Issue (3): 339-349.doi: 10.11872/j.issn.1005-2518.2019.03.339
• 矿产勘查与资源评价 • 上一篇
寻峰1,2,3(),柳建新1,2,3,刘春明1,2,3(),郭振威1,2,3
Feng XUN1,2,3(),Jianxin LIU1,2,3,Chunming LIU1,2,3(),Zhenwei GUO1,2,3
摘要:
广西某金矿区内广泛分布炭质岩,使得矿区整体电阻率偏低,加大了异常体的分布范围,对区分矿致异常及进一步缩小找矿靶区产生了干扰。为了满足深部找矿的勘探要求,在该矿区开展了激电中梯扫面和激电测深等一系列双频激电工作。通过重点把握中、高极化的激电异常区,再结合低阻构造带进行找矿靶区的初步圈定,最后对主要异常区和构造带开展激电测深验证。根据视幅频率和视电阻率确定了4个激电异常区并划分了5条构造带,验证结果表明:1、2号异常区分别与1、2号构造带吻合较好,推测异常是由断裂带或破碎带周边的炭质地层和金属硫化物引起的;3号异常区位于3号构造带与5号构造带相交处,且有向北延伸的趋势,推测异常主要由炭质地层所引起;4号异常区内没有相应构造带的控制,难以对异常源进行合理推断。根据上述勘探结果,圈定了3个地球物理找矿靶区,通过与激电测深反演以及后期的钻探资料进行比较,验证了双频激电法对本金矿区找矿的指导意义,为进一步地质勘探工作提供了科学依据,也为今后开展相关的电法工作提供了思路。
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