摘要
鲁西莱芜地区是国内重要的富铁矿基地之一,是典型的与中基性侵入岩有关的矽卡岩型铁矿,矿石品位高、储量大。该区铁矿找矿采用地面磁测、航空磁测和重力测量作为主要方法,在区内圈定多个物探异常,累计探明大中小型富铁矿床40余个。在此基础上总结分析该区富铁矿成矿规律,介绍张家洼典型矿床磁异常特征,建立莱芜地区富铁矿地质-地球物理综合勘查模型,得到以下认识:①航磁、重力异常圈定隐伏岩体效果好;②地质、物探密切配合是正确评价异常的关键;③研究低缓异常必须高精度;④要注重研究磁场的局部特征变化;⑤突破乱磁场区可能取得找矿实践。
Laiwu area in western Shandong Province is one of the important High-grade Fe ores bases in China.It is a typical skarn type iron ore related to medium basic intrusive rocks,with high grade and large reserves.The main methods of iron ore prospecting in this area are ground magnetic survey,aeromagnetic survey and gravity survey.Several geophysical anomalies have been identified in the inner circle of the area,and more than 40 large,medium and small iron rich deposits have been explored.On this basis,the metallogenic law of the rich iron ore in this area is summarized and analyzed,and the comprehensive geological geophysical exploration model of the rich iron ore in Laiwu area is established.The following conclusions are obtained:①The effect of aeromagnetic and gravity anomalies in delineating concealed rock mass is good;②Close cooperation of geological and geophysical exploration is the key to correct evaluation of anomalies;③High precision is necessary to study low and slow anomalies;④Local research of magnetic field should be emphasized;⑤Breaking through the disordered magnetic field area may lead to prospecting practice.
作者
马明
高继雷
高明波
李亚东
付厚起
冯启伟
宋波
MA Ming;GAO Jilei;GAO Mingbo;LI Yadong;FU Houqi;FENG Qiwei;SONG Bo(No.1 Institute of Geology and Mineral Resources of Shandong Province,Shandong Ji'nan,250100;Shandong Engineering Laboratory for High-Grade Iron Ore Exploration and Exploitation,Shandong Ji'nan,250100)
出处
《华北地震科学》
2020年第2期13-20,共8页
North China Earthquake Sciences
基金
山东省地质矿产勘查开发局局控勘查项目“山东省淄博-莱芜地区富铁矿勘查评价及深部成矿预测”(KC201901)。
关键词
地球物理特征
富铁矿
勘查模型
莱芜地区
geophysical characteristics
high-grade Fe ores
exploration model
Laiwu area
