Prospecting prediction of Chigou mining area in Shanyang, Shaanxi Province based on gravity, magnetic and electric data
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摘要: 近年来西北有色七一三总队有限公司在池沟矿权区陆续开展了激电、中梯等物探勘查工作,取得了不少成果,但关于池沟岩体分布、控岩控矿断裂构造、岩体接触带等信息未全面厘清。本文基于新完成的池沟铜钼矿区重、磁、电综合物探找矿资料,结合研究区已有地质、钻孔等资料,对重力、磁力及电法资料进行处理,综合分析了该区重、磁异常场特征,划定了控岩、控矿断裂构造,找出岩浆主侵通道;确定了与成矿关系密切的隐伏岩体侵入范围,圈定隐伏—半隐伏岩体2处;厘清了隐伏岩体、岩体接触带、矿化体的地球物理场特征,指出岩体与地层接触带为主成矿部位,预测了找矿有利区,经钻孔验证获得找矿突破。研究结果对该区进一步铜钼矿勘探有重要借鉴意义。Abstract: In recent years, Northwest Nonferrous 713 General Team Co., Ltd. has successively carried out geophysic exploration work such as IP middle stage in Chigou ore rights area, and gained Many achievements, but the information about Chigou rock mass distribution, rock and ore controlling fault structure, rock contact zone and other information is not fully clarified. Based on the newly completed gravity, magnetic and electric comprehensive geophysical prospecting data of Chigou Cu-Mo deposit, combined with the existing geological and borehole data in the study area, gravity, magnetic force and AMT data were processed, and the characteristics of gravity and magnetic anomaly field in the area were comprehensively analyzed, the rock and ore controlling fault structure was delineated and the main magma invasion channel was found. The intrusion range of concealed rock mass closely related to mineralization was determined, and two concealed and semi-concealed rock masses were delineated. The geophysical field characteristics of concealed rock mass, contact zone of rock mass and mineralized body are clarified, and the contact zone of rock mass and stratum is the main metallogenic site. The favorable prospecting area is predicted, and the prospecting breakthrough is obtained through drilling verification. The research results have important reference significance for further exploration of copper and molybdenum deposits in this area.
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