重磁技术在河南师灵地区铁矿调查中的应用  

Application of Gravity and Magnetic Technology in Iron Ore Survey in Shiling Area,Henan Province

作　　者：刘家橘[1,2] 刘家橙 乔天荣[1,2] 张栋 朱德胜[1,2] 张馨元 LIU Jiaju;LIU Jiacheng;QIAO Tianrong

机构地区：[1]河南省地质调查院,河南郑州450001 [2]河南省城市地质工程技术研究中心,河南郑州450001

出　　处：《地理空间信息》2021年第3期109-111,120,I0003,共5页Geospatial Information

基　　金：河南省重大科技专项资助项目(151100311000、182300410106)。

摘　　要：师灵工作区位于豫东平原的西南部,属伏牛山系余脉。工作区重力、磁法相结合,通过分析重磁异常展布、强度和形态特征进行重磁反演,发现DC8异常埋深在1.2 km左右接近水平状磁性地质体;对磁异常进行钻孔验证,其由磁铁矿角砾的角砾状安山岩引起,结合区内的岩性物性,含磁铁矿安山岩为寻找铁矿床的重要信息是该区的重磁找矿特征、寻找铁矿的主要方向。The Shiling working area is located in the southwestern part of the Northern Henan Plain,belonging to the residual range of the Funiu Mountains.Combining gravity and magnetic methods in the working area,we carried out the gravity and magnetic inversion by analyzing the distribution,intensity and morphological characteristics of gravity and magnetic anomalies.The result showed that the anomaly depth of DC8 was close to the horizontal magnetic geological body at about 1.2 km.Then,we verified the magnetic anomaly by drilling.The result showed that it caused by the breccia like andesite of magnetite breccia.Combining with the lithologic and physical properties of the area,we found that magnetite bearing andesite was the important information for searching iron ore deposits,and the main direction of iron ore prospecting.

关 键 词：重磁反演 磁铁矿 安山岩 师灵地区 

分 类 号：P25[天文地球—测绘科学与技术]