赣中铁矿田某老铁矿山磁测资料综合解译方法  

Comprehensive Interpretation Method of the Magnetic Survey Data of an Old Iron Mine in Ganzhong Iron Ore Field

作　　者：周栋良[1] 蔡立信[2] Zhou Dongliang Uai Lixin(Geological Investigation Brigade in Western Jiangxi Province, Jiangxi Bureau of Exploration and Development for Geology and Mineral Resources Geological Brigade, Jiangxi Bureau of Exploration and Development for Geology and Mineral Resources)

机构地区：[1]江西省地质矿产勘查开发局赣西地质调查大队 [2]江西省地质矿产勘查开发局902地质大队

出　　处：《现代矿业》2017年第9期43-51,共9页Modern Mining

摘　　要："新余式"铁矿是赣中铁矿田标志性的矿体形态,研究"新余式"铁矿可为在赣中铁矿田中深部进行铁矿找矿勘查、建立找矿模式提供可靠依据。以赣中铁矿田内某老铁矿山为例,分析了矿区地质特征及地球物理特征,并对该矿区已有的物探(1∶10 000地面高精度磁测,1∶1 000地面高精度磁测剖面测量,井中磁测以及磁性标本测量)和地质工作成果进行了综合解译,划分了矿区西北部磁异常带(C_(1-1))、中部磁异常带(C_(1-2))、东部磁异常带(C_(1-3))、西部磁异常带(C_(1-4)~C_(1-8))、东北部磁异常带(C_(1-9)、C_(1-10)以及东南部磁异常带(C_(1-11~C_(1-14),并进行了异常解译。在此基础上,采用录入剖面数据、参数设置、建立初始模型、模型反演、修改模型、模型再次反演等步骤对磁异常数据进行了反演拟合计算,并对反演的模型体进行了定性解译,分析推断了C_(d1)、C_(d2)、C_(d3)、C_(d4)模型的异常类型,即C_(d1)模型代表强磁性地质体,C_(d2)、C_(d3)模型代表超强磁性地质体,C_(d4)模型代表中强磁性地质体。研究表明:通过综合解译老矿山地面高精度磁测和井中磁测资料,可消除因矿区开采而引起的磁测异常,有效反演矿区磁异常特征;通过多种磁测资料的综合解译来进行异常划分与查证,是老矿山中深部矿体定位预测的有效找矿模式。＂ Xinyu＂ type iron deposit is the typical ore-body shape in Ganzhong Iron Ore Field,the study of ＂ Xinyu＂ type iron deposit can provide some reliable basis for iron deposit prospecting and exploration in the middle-depth of Ganzhong Iron Ore Field and the establishment of prospecting model. Taking an old iron mine in Ganzhogn Iron Ore Field as the study example,in order to study the comprehensive prospecting model of old iron mines and expand the resources reserves of old iron mines,the geological characteristics and geophysical characteristics of the mining area are analyzed in detail,the comprehensive analysis and interpretation of the already existed geological working results and geophysical working results（ include the data of 1 ∶ 10 000 ground high-precision magnetic survey,1 ∶ 1 000 ground high-precision magnetic survey profile measurement,magnetic well logging and magnetic specimen measurement）are conducted,the magnetic anomaly belt in the northwest area of the mining area（ C（1-1））,magnetic anomaly belt in the central area of the mining area（ C（1-2））,magnetic anomaly belt in the north area of the mining area（ C（1-3））,magnetic anomaly belt in the west area of the mining area（ C（1-4）~ C（1-8））,magnetic anomaly belt in the northeast area of the mining area（ C（1-9）,C（1-10） and magnetic anomaly belt in the southeast of the mining area（ C（1-11~ C（1-14） are divided,and they are interpreted in detail. Based on the above analysis results,the magnetic anomaly data is conducted inversion fitting calculation by adopting the steps of input profile data,parameter setting,establishment of initial model,model inversion,model modification and model inversion again,the inversion models are conducted qualitative interpretation,the anomaly types of C（d1）、C（d2）、C（d3）、C（d4） model are analyzed and inferred,it is show that the strong magnetic geological body is represented by C（d1） model,the super-strong magnetic geological body is rep

关 键 词：铁矿 老矿山 地面高精度磁测 综合解译 异常带 找矿模式 

分 类 号：P618.31[天文地球—矿床学] P631.2[天文地球—地质学]