| 利用平台磁异常的综合地球物理特征推断矿体的成因类型 |
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| 引用本文： | 陈炳武,申扎根.利用平台磁异常的综合地球物理特征推断矿体的成因类型[J].物探与化探,2012,36(4):550-555. |
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| 作者姓名： | 陈炳武 申扎根 |
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| 作者单位： | 河南省有色金属地质勘查总院,河南 郑州,450052 |
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| 摘 要： | 简要介绍了接触交代—热液型铁矿床和沉积变质铁矿床形成的地质环境、控制条件,矿体形态特点和经济利用价值,通过平台磁异常Za-Ha双分量参量图研究,拟合反演,提出平台磁异常可能对应陡立接触带形态的磁性体。在重磁相关分析中,由相关系数的大小判断出平台磁异常重磁不同源,说明平台磁异常主体部分对应的磁性体不是沉积变质铁矿床。在CSAMT测深法探测结果分析中,提出平台磁异常深部可能存在岩浆岩侵入活动的物探证据。从而说明平台磁异常区具备形成接触交代—热液型铁矿床的可能性和几个必要条件,综合地质、物探资料推测平台磁异常成矿类型可能是接触交代—热液型铁矿床。
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| 关 键 词： | 接触交代—热液型铁矿床 沉积变质铁矿床 重磁异常相关分析 CSAMT测深法 |
THE APPLICATION OF THE INTEGRATED GEOPHYSICAL CHARACTERISTICS OF PINGTAI MAGNETIC ANOMALIES TO THE DEDUCTION OF ORE GENESIS |
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| CHEN Bing-wu
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SHEN Zha-gen.THE APPLICATION OF THE INTEGRATED GEOPHYSICAL CHARACTERISTICS OF PINGTAI MAGNETIC ANOMALIES TO THE DEDUCTION OF ORE GENESIS[J].Geophysical and Geochemical Exploration,2012,36(4):550-555. |
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| Authors: | CHEN Bing-wu SHEN Zha-gen |
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| Institution: | (Henan Institute of Non-ferrous Metal Exploration,Zhengzhou 450052,China) |
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| Abstract: | In this paper,geological environments,ore-control conditions,ore body shape characteristics and utilization values of contact-metasomatic type,hydrothermal type and sedimentary-metasomatic type iron deposits are discussed briefly.Based on studying the Za-Ha double component parameter diagram and the inverse fitting of Pingtai magnetic anomaly,the authors hold that Pingtai anomaly is likely to indicate a magnetic body with steep attitude.The gravity and magnetic correspondence analysis shows that the Pingtai gravity anomaly and the magnetic anomaly are not of the same source,and Pingtai anomaly is not the manifestation of a sedimentary-metasomatic type iron deposit.According to the CSAMT results,the evidence of magmatic activity in Pingtai area was found,so that there exist some necessary conditions for the formation of contact-metasomatic type and hydrothermal type iron deposits in Pingtai abnormal area.Comprehensive geological-geophysical data suggest that Pingtai anomaly is the product of a contact-metasomatic type and hydrothermal type iron deposit. |
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| Keywords: | contact-metasomatic type hydrothermal type iron deposit sedimentary metamorphic iron ore bed gravity and magnetic anomaly correlation analysis CSAMT sounding method |
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