鲁中地区矿山岩体北部倾伏端重磁异常特征及其找矿方向  

Characteristics of Gravity and Magnetic Anomalies in the Northern Dipping End of Mining Rock Masses in the Central Shandong Province and Prospecting Direction

作　　者：赵晓博 张保涛[1] 胡创业 胡兆国[1] 王小玉[1] 胡加斌 杨超 葛瑞臣 孙峰 ZHAO Xiaobo;ZHANG Baotao;HU Chuangye;HU Zhaoguo;WANG Xiaoyu;HU Jiabin;YANG Chao;GE Ruichen;SUN Feng(Shandong Zhengyuan Geological Exploration Institute,Shandong Ji'nan 250013,China)

机构地区：[1]中国冶金地质总局山东正元地质勘查院,山东济南250013

出　　处：《山东国土资源》2024年第3期85-93,共9页Shandong Land and Resources

基　　金：山东省自然资源厅山东省2021年部省合作地质勘查项目(SDGP370000000202102003484);中国冶金地质总局鲁中地区富铁矿体定位预测与增储示范项目(编号:2022YFC2903702)。

摘　　要：鲁中地区矿山岩体是富铁矿成矿的重要地质体,一直是勘查和研究的热点区域,但其北部倾伏端的重磁异常特征则研究相对滞后。本次工作首次利用1∶1万航空磁测数据,结合重力数据,对鲁中地区矿山岩体北部倾伏区域开展了系统的重磁异常联合解译,更新完善了地质地球物理有利找矿标志。结合地质认识,提出了张家洼Ⅲ矿床西翼深部、东翼深部、矿山弧形背斜北部倾伏端两翼3处有利找矿方向。综合分析认为,区内已有主要矿体在深部未封闭,推测覆盖区仍存在未发现的盲矿体,低缓磁异常的外凸分支异常区、张家洼铁矿深部、冶庄地区北部等区仍具有较大的找矿潜力,为研究区深部找矿工作提供了有利指示。The mine rock mass in central Shandong province is an important geological body for iron ore mineralization,and has always been a hot area for exploration and research.However,the study of gravity and magnetic anomaly characteristics of the northern plunging end is relatively lagging behind.In this work,airborne magnetic survey data with the scale of 1∶10000 has been used,is the first time.Combining with gravity data,systematic joint interpretation of gravity and magnetic anomalies in the northern inclined area of mine rock mass in Luzhong area has been carried out,and geological and geophysical favorable prospecting indicators have been updated and improved.Combining with geological understanding,three favorable prospecting directions have been proposedin the deep part of west wing,deep part of east wing and two wings of north plunging end of the mine arc anticline of ZhangjiawaⅢdeposit.Through comprehensive analysis,it is showed that main ore bodies in the area are not closed in the deep part.It is speculated that there are still undiscovered blind ore bodies in the coverage area.The outer convex branch anomaly area with low magnetic anomaly,the deep part of Zhangjiawa iron mine and the northern part of Yezhuang area still have great prospecting potential.It will provide a favorable indication for deep prospecting work in the study area.

关 键 词：重磁异常 找矿方向 矿山岩体 鲁中地区 

分 类 号：P631.2[天文地球—地质矿产勘探]