武夷山北段及相邻区深部电性构造与成矿分析:基于三维大地电磁探测结果

仇根根; 方慧; 吕琴音; 彭炎

doi:10.12029/gc20190408

武夷山北段及相邻区深部电性构造与成矿分析:基于三维大地电磁探测结果

中国地质科学院地球物理地球化学勘查研究所, 河北廊坊 065000

基金项目:
国家自然科学基金项目（41574068）、国家重点研发计划项目（2016YFC0600201）、中国地质调查局项目（121201108000160913、12120114005801、DD20160082、DD20190032）和地科院基本科研项目（AS2016J12）联合资助

详细信息

作者简介: 仇根根, 男, 1984年生, 硕士, 高级工程师, 主要从事大地电磁法方法技术研究与应用, E-mail:qiugengen@igge.cn

中图分类号: P631.3⁺25

收稿日期: 2019-05-11

修回日期: 2019-07-19

刊出日期: 2019-08-25

Deep electrical structures and metallogenic analysis in the north section of Wuyishan Mountains and its adjacent areas: Based on three-dimensional magnetotelluric sounding results

Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, Hebei, China

Fund Project: Supported by the National Natural Science Foundation of China (No.41574068), the National Key R & D project (2016YFC0600201), China Geological Survey project (No.121201108000160913, No.12120114005801, No.DD20160082, No. DD20190032), and Basic Scientific Research project of CAGS(No.AS2016J12)

More Information

Author Bio: QIU Gengen, male, born in 1984, master, senior engineer, mainly engaged in the research and application of magnetotelluric method; E-mail:qiugengen@igge.cn .

Received Date: 11 May 2019

Revised Date: 19 July 2019

Publish Date: 25 August 2019

摘要

摘要:
华南地区经历了多期构造-岩浆-成矿作用，矿产资源丰富，存在多个成矿聚集区，是国家经济发展的重要矿产基地。本文使用华南地区采集的区域大地电磁阵列观测数据，利用WSINV3DMT三维反演程序科学构建了武夷山北段及相邻区三维电性结构模型。结果显示，沿闽西北断裂、政和—大浦断裂等断裂带下方，深部表现为明显的低阻异常带，可能是古微陆块拼合线或深大断裂的反映，对上覆浅层断裂构造具有明显的控制作用。武夷地区已探明的主要内生金属矿床中，绝大部分矿床点位于这些低阻异常带、深部软流体边缘位置上方，同时又主要分布于ΔT化极磁异常梯度带之上，具有明显的分布规律性，结合上述规律和特征，可在武夷地区初步圈定找矿有利方向。
- 武夷山北段 /
- 大地电磁 /
- 深部构造 /
- 找矿远景区 /
- 深部资源工程
Abstract:
South China has experienced the evolution of multiple stages of tectonic-magma-mineralization. It is rich in mineral resources and has multiple mineralization concentration areas, which constitute an important base for national economic development. In this paper, the three-dimensional electrical structure model of the northern part of Wuyi Mountain and adjacent areas is constructed by using the regional magnetotelluric array observation data acquired in south China and the three-dimensional inversion program of WSINV3DMT. The electrical characteristics of the model show that the deep electrical characteristics along the lower part of the fault zone exhibit obvious low resistivity anomalous zones. The low resistivity anomalous zones may be the response of deep and large faults or the assembling boundary of paleo-micro-continental blocks, which have obviously controlled the shallow fault structure. It is found that most of the major endogenous metal deposits in Wuyi area are located above the low resistivity anomaly zone and the edge of deep soft fluids. They have obvious distribution regularity. At the same time, they are mainly distributed in the gradient zone of ΔT polarized magnetic anomaly. Combined with the above distribution rules and characteristics, the favorable areas for prospecting can be preliminarily delineated in Wuyi area.
- north section of Wuyi Mountain /
- magnetotelluric /
- deep structures /
- prospecting area /
- deep resources engineering

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图 1 大地电磁测深点位与主要断裂分布

Figure 1.

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图 2 远参考处理前后效果对比

Figure 2.

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图 3 复杂三维电性结构模型示意图

Figure 3.

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图 4 Model01复杂电阻率渐变三维电性结构模型剖面

Figure 4.

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图 5 某中间测点MT三维正演响应曲线

Figure 5.

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图 6 复杂电阻率渐变三维模型沿X方向数值模拟结果

Figure 6.

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图 7 Model02复杂电阻率突变三维电性结构模型剖面

Figure 7.

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图 8 视电阻率突变复杂三维模型沿X方向上反演结果对比

Figure 8.

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图 9 武夷山北段及相邻区三维电性结构模型

Figure 9.

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图 10 15 km、30 km深度平面电性特征与主要内生金属矿床分布

Figure 10.

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图 11 调查区ΔT化极磁异常与主要内生金属矿产资源点位分布

Figure 11.

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图 12 武夷山北段及相邻区找矿远景区初步预测

Figure 12.

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武夷山北段及相邻区深部电性构造与成矿分析:基于三维大地电磁探测结果

中国地质科学院地球物理地球化学勘查研究所, 河北 廊坊 065000

作者简介: 仇根根, 男, 1984年生, 硕士, 高级工程师, 主要从事大地电磁法方法技术研究与应用, E-mail:qiugengen@igge.cn

Deep electrical structures and metallogenic analysis in the north section of Wuyishan Mountains and its adjacent areas: Based on three-dimensional magnetotelluric sounding results

Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, Hebei, China

Author Bio: QIU Gengen, male, born in 1984, master, senior engineer, mainly engaged in the research and application of magnetotelluric method; E-mail:qiugengen@igge.cn .

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中国地质科学院地球物理地球化学勘查研究所, 河北廊坊 065000