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物探与化探  2021, Vol. 45 Issue (5): 1196-1207    DOI: 10.11720/wtyht.2021.0075
  地质调查·资源勘查 本期目录 | 过刊浏览 | 高级检索 |
基于重、磁、电资料的陕西山阳池沟矿区找矿预测
段瑞锋1,2,3(), 袁炳强1,2, 冯旭亮1,2, 强洋洋3, 段奔奔3, 邢锦程1,2, 刘磊3
1.西安石油大学 地球科学与工程学院,陕西 西安 710065
2.陕西省油气成藏地质学重点实验室,陕西 西安 710065
3.陕西地矿物化探队有限公司,陕西 西安 710043
Prospecting prediction of Chigou mining area in Shanyang, Shaanxi Province based on gravity, magnetic and electric data
DUAN Rui-Feng1,2,3(), YUAN Bing-Qiang1,2, FENG Xu-Liang1,2, QIANG Yang-Yang3, DUAN Ben-Ben3, XING Jin-Cheng1,2, LIU Lei3
1. College of Geosciences and Engineering,Xi’an Shiyou University, Xi’an 710065,China
2. Shaanxi Key Lab of Petroleum Accumulation Geology, Xi’an 710065, China
3. Shaanxi Geo-mining geophysical and Geochemical Exploration Team Co. Ltd.,Xi’an 710043, China
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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。
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段瑞锋
袁炳强
冯旭亮
强洋洋
段奔奔
邢锦程
刘磊
关键词 ： 山阳池沟,  重、磁、电异常,  隐伏岩体,  找矿预测    
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.
Key words： Shanyang Chigou    gravity, magnetic and electric anomaly    concealed rock mass    prospecting prediction
收稿日期: 2021-02-09      修回日期: 2021-04-02      出版日期: 2021-10-20
ZTFLH:  P631  
基金资助:中国地质调查局发展研究中心矿集区矿产调查与深部找矿预测项目”陕西省山阳矿集区深部找矿预测“(WKZB190BJB300375)
作者简介: 段瑞锋(1986-),男,2010年毕业于西安石油大学,主要从事重磁电方法应用及研究工作。 Email: 450991137@qq.com
引用本文:   
段瑞锋, 袁炳强, 冯旭亮, 强洋洋, 段奔奔, 邢锦程, 刘磊. 基于重、磁、电资料的陕西山阳池沟矿区找矿预测[J]. 物探与化探, 2021, 45(5): 1196-1207.
DUAN Rui-Feng, YUAN Bing-Qiang, FENG Xu-Liang, QIANG Yang-Yang, DUAN Ben-Ben, XING Jin-Cheng, LIU Lei. Prospecting prediction of Chigou mining area in Shanyang, Shaanxi Province based on gravity, magnetic and electric data. Geophysical and Geochemical Exploration, 2021, 45(5): 1196-1207.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.0075      或      https://www.wutanyuhuatan.com/CN/Y2021/V45/I5/1196
Fig.1  池沟地区大地构造位置
Ⅰ—华北板块;Ⅱ—扬子板块;Ⅲ—秦岭褶皱系;Ⅲ1—北秦岭加里东褶皱带;Ⅲ2—南秦岭礼县-柞水华力西褶皱带;Ⅲ3—南秦岭印支褶皱带;Ⅲ4—北大巴山加里东褶皱带;Ⅳ—松藩-甘孜褶皱系;Ⅴ—徽成拗陷;Ⅵ—南阳拗陷; F1—商南-丹凤断裂;F2—凤镇-山阳断裂;F3—石泉-安康断裂;1—一级构造单元界线;2—二级构造单元界线;3—断裂带;4—池沟地区
Fig.2  池沟地区地质
类别 岩性 标本数 密度ρ/(103 kg·m-3)
平均值 最大值 最小值
地层 透辉石角岩 33 2.80 3.03 2.67
黑云母角岩 41 2.73 2.92 2.59
石英角岩类 39 2.74 2.86 2.60
砂岩、粉砂岩类 37 2.70 2.86 2.57
大理岩类 10 2.77 2.82 2.65
蚀变、破碎带 侵入、蚀变角岩 16 2.63 2.75 2.48
破碎带角岩 6 2.61 2.72 2.48
岩体 石英闪长玢岩 34 2.65 2.73 2.53
黑云母二长花岗岩 38 2.58 2.63 2.54
含矿岩体 黄铜矿化石英闪长玢岩 20 2.64 2.71 2.55
黄铜矿化黑云母二长花岗岩 6 2.50 2.54 2.47
含矿地层 黄铜矿化黑云母角岩 17 2.72 2.82 2.63
黄铜矿化碎裂状石英角岩 5 3.01 3.61 2.71
含矿侵入角砾岩 黄铜矿化侵入角砾岩 5 2.66 2.74 2.59
Table 1  池沟地区岩、矿石密度统计
岩性 标本数 磁化率κ/(4π×10-6 SI)
最小值 最大值 均值
蚀变透辉石角岩 30 38.22 98.73 63.91
强风化泥化蚀变透辉石角岩 4 732.48 2261.15 1480.89
透辉石角岩 33 38.22 407.64 132.21
黑云母角岩 33 28.66 280.25 113.40
角砾岩 7 9.55 35.03 15.92
粉砂质板岩 34 15.92 159.24 56.67
Ⅰ号岩体黑云二长花岗岩 30 22.29 2261.15 472.51
Ⅱ号岩体石英闪长岩 9 3621.02 9426.75 6481.60
Ⅲ号岩体石英闪长玢岩 3 366.24 477.71 427.81
Table 2  池沟地区岩、矿石磁化率统计
岩 性 标本数 极化率/% 电阻率/(Ω·m)
最小值 最大值 均值 最小值 最大值 均值
蚀变透辉石角岩 30 1.22 3.62 2.31 106.27 365.13 210.56
强风化泥化蚀变透辉石角岩 4 2.17 3.00 2.61 151.49 301.32 208.85
透辉石角岩 33 0.20 2.01 0.79 348.85 9739.45 3052.56
黑云母角岩 33 0.71 1.53 1.03 508.48 1509.31 969.07
角砾岩 7 0.78 1.66 1.17 326.75 1456.11 918.77
粉砂质板岩 34 0.63 1.87 1.14 288.96 2726.37 1145.44
Ⅰ号岩体黑云二长花岗岩 30 0.68 2.43 1.45 307.73 1734.44 1024.04
Ⅱ号岩体石英闪长岩 9 0.85 1.51 1.08 308.14 2203.21 1109.62
Ⅲ号岩体石英闪长玢岩 3 0.50 1.24 0.90 1351.61 3726.07 2301.41
Table 3  池沟地区岩、矿石电性参数统计
Fig.3  布格重力异常等值线
Fig.4  化极后磁ΔT异常与解释推断叠合
Fig.5  激电中梯视电阻率异常
Fig.6  激电中梯视极化率异常
Fig.7  激电测深、AMT剖面位置
Fig.8  鸡冠沟激电测深视电阻率拟断面
Fig.9  鸡冠沟激电测深视极化率拟断面
Fig.10  AMT剖面反演等值线
Fig.11  重力水平总梯度与解释推断叠合
Fig.12  P1剖面综合解释推断
Fig.13  P2剖面综合解释推断
Fig.14  找矿有利区与岩体顶面埋深叠合
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