地面磁测与磁测井技术在安徽庐江小包庄铁矿勘探中的应用
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摘要
安徽庐江小包庄铁矿是近年来发现的深部大型铁矿床,其主矿体位于已探明的大型铁矿罗河铁矿的正下方800～1 000 m处,是在"以矿找矿"思想指导下寻找深部矿产资源的一次重大突破。在罗河铁矿区域的原有地磁异常认识的基础上,运用小波多尺度分解技术处理高精度磁测数据,结果表明该区域的深部第二空间找矿潜力巨大。应用三分量磁测井技术对已有钻孔进行三分量的精细测量和磁异常的特征分析,在钻孔ZK2602深部发现弱磁异常。通过加深钻孔来勘查异常来源,在孔深1 377 m处见厚大的磁铁矿体。根据地面高精度磁测异常和已有钻孔测井分析矿体的延伸、走向、倾向布置钻探工程,见矿效果良好,确定小包庄铁矿的储量属大型矿床,是庐枞地区深部找矿的一次重大突破。
The Xiaobaozhuang iron deposit in Lujiang, Anhui Province is a deep large-scale iron deposit discovered in recent years. Its main ore body is located at 800-1,000 m directly below the proven large iron ore mine, i.e., Luohe iron deposit, which is a major breakthrough in the exploration of deep mineral resources under the idea of ″prospecting by discovered deposits″. Based on the study of the original geomagnetic anomalies in the Luohe iron deposit, the high-precision magnetic measurement data was treated by wavelet multi-scale decomposition technology, and the results show that the potential of deep second space prospecting in the region is huge. The fine measurement of existing drilling and the characteristic analysis of magnetic anomalies were carried out by three-component magnetic logging technology, and weak magnetic anomalies were found at the depth of the Drilling Hole ZK2602. A large magnetite body was seen at a depth of 1,377 m by deepening the drilling to investigate the source of the anomaly. The high-precision magnetic anomaly on the ground and the existing borehole logging analysis were used to analyze the extension, direction and inclination of the ore body to arrange the drilling project, with good exploration results. The Xiaobaozhuang iron deposit is determined as a large scale reserve, which is a major breakthrough in the deep prospecting in Lujiang-Zongyang area.
The Xiaobaozhuang iron deposit in Lujiang, Anhui Province is a deep large-scale iron deposit discovered in recent years. Its main ore body is located at 800-1,000 m directly below the proven large iron ore mine, i.e., Luohe iron deposit, which is a major breakthrough in the exploration of deep mineral resources under the idea of ″prospecting by discovered deposits″. Based on the study of the original geomagnetic anomalies in the Luohe iron deposit, the high-precision magnetic measurement data was treated by wavelet multi-scale decomposition technology, and the results show that the potential of deep second space prospecting in the region is huge. The fine measurement of existing drilling and the characteristic analysis of magnetic anomalies were carried out by three-component magnetic logging technology, and weak magnetic anomalies were found at the depth of the Drilling Hole ZK2602. A large magnetite body was seen at a depth of 1,377 m by deepening the drilling to investigate the source of the anomaly. The high-precision magnetic anomaly on the ground and the existing borehole logging analysis were used to analyze the extension, direction and inclination of the ore body to arrange the drilling project, with good exploration results. The Xiaobaozhuang iron deposit is determined as a large scale reserve, which is a major breakthrough in the deep prospecting in Lujiang-Zongyang area.
引文
常印佛,刘湘培,吴言昌,1991.长江中下游铜铁成矿带[M].北京:地质出版社:71-76.
崔健,何委徽,韩红庆,等,2018.二代小波变换在重力场源分离中的应用[J].地质学刊,42(4):616-622.
高昌生,张千明,尚世贵,等,2003.安徽庐江小包庄铁矿普查地质报告[R].合肥:安徽省地质矿产勘查局327地质队.
侯遵泽,杨文采,1995.小波分析应用研究[J].物探化探计算技术,17(3):1-9.
黄震,黄建平,2008.江苏镇江韦岗铁矿区深部找矿前景分析[J].地质学刊,32(3):184-188.
黄维婷,钱赓,臧文亚,2011.小波分析在王官屯油田王26井枣Ⅴ油层组沉积微相研究中的应用[J].地质学刊,35(4):379-385.
刘天佑,2007.磁法勘探软件MAGS2.0手册[M].武汉:中国地质大学(武汉).
刘一,曾勇,高天山,2008.浅析长江中下游成矿带深部矿找矿潜力及找矿方向[J].地质学刊,32(4):292-296.
尚世贵,2014.小波变换在磁异常分离中的应用:以安徽庐枞矿集区小包庄铁矿床为例[J].物探与化探,38(6):1119-1123.
唐永成,吴言昌,储国正,等,1998.安徽沿江地区铜金多金属矿床地质[M].北京:地质出版社:60-85.
唐晓初,2006.小波分析及其应用[M].重庆:重庆大学出版社.
周涛发,范裕,袁峰,等,2008.安徽庐枞(庐江-枞阳)盆地火山岩的年代学及其意义[J].中国科学:地球科学,38(11):1342-1353.
张作宏,魏邦顺,张大莲,等,2016.精细反演计算在镇江五洲山磁异常再解释中的应用[J].地质学刊,40(4):653-661.
崔健,何委徽,韩红庆,等,2018.二代小波变换在重力场源分离中的应用[J].地质学刊,42(4):616-622.
高昌生,张千明,尚世贵,等,2003.安徽庐江小包庄铁矿普查地质报告[R].合肥:安徽省地质矿产勘查局327地质队.
侯遵泽,杨文采,1995.小波分析应用研究[J].物探化探计算技术,17(3):1-9.
黄震,黄建平,2008.江苏镇江韦岗铁矿区深部找矿前景分析[J].地质学刊,32(3):184-188.
黄维婷,钱赓,臧文亚,2011.小波分析在王官屯油田王26井枣Ⅴ油层组沉积微相研究中的应用[J].地质学刊,35(4):379-385.
刘天佑,2007.磁法勘探软件MAGS2.0手册[M].武汉:中国地质大学(武汉).
刘一,曾勇,高天山,2008.浅析长江中下游成矿带深部矿找矿潜力及找矿方向[J].地质学刊,32(4):292-296.
尚世贵,2014.小波变换在磁异常分离中的应用:以安徽庐枞矿集区小包庄铁矿床为例[J].物探与化探,38(6):1119-1123.
唐永成,吴言昌,储国正,等,1998.安徽沿江地区铜金多金属矿床地质[M].北京:地质出版社:60-85.
唐晓初,2006.小波分析及其应用[M].重庆:重庆大学出版社.
周涛发,范裕,袁峰,等,2008.安徽庐枞(庐江-枞阳)盆地火山岩的年代学及其意义[J].中国科学:地球科学,38(11):1342-1353.
张作宏,魏邦顺,张大莲,等,2016.精细反演计算在镇江五洲山磁异常再解释中的应用[J].地质学刊,40(4):653-661.