冀东抚宁地区航磁异常特征与找矿前景

Characteristics of aviation Magnetic anomaly and its prospecting prospect in Funing area,eastern Hebei

冀东抚宁地区位于华北地台燕山褶皱带东南部,地层发育较齐全,矿产资源较丰富。1988年核工业航测遥感中心在该地区开展了1∶5万航空磁法测量,取得了丰富的航磁测量数据,筛选出一批航磁异常。本文以抚宁柳江盆地为例,通过对本区地质构造特征、岩矿石物性参数及航磁异常特征等进行综合研究。基本查明航磁异常性质和规模,认为该地区航磁异常的成因为响山花岗岩体与寒武系围岩接触带的矿化蚀变引起,属于矽卡岩型磁铁矿,具有较好的找铁矿前景。

The Funing area in eastern Hebei is located in the southeastern part of the Yanshan Fold Belt of the North China Platform,with well-developed strata and abundant mineral resources.In 1988,the Nuclear Industry Aerial Surveying and Remote Sensing Center conducted 1:50000 aeromagnetic survey has obtained abundant aeromagnetic survey data and screened out a batch of aeromagnetic anomalies.Taking the Liujiang Basin in Funing as an example,this paper conducts a comprehensive study on the geological structure characteristics,physical parameters of rocks and ores,and characteristics of aeromagnetic anomalies in this area.The nature and scale of aviation Magnetic anomaly are basically found out,and it is believed that the aviation Magnetic anomaly in this area is caused by mineralization and alteration of the contact zone between the Xiangshan granite body and Cambrian wall rock,which belongs to skarn Magnetite,and has good prospects for iron ore prospecting.