地面高精度磁测方法在某磷矿资源评价中的有效性  

The effectiveness of the ground high-precision magnetic survey methods in resouces evaluation of certain phosphate

作　　者：张葆昕 赵强 田增彪 

机构地区：[1]华北地质勘查局五一九大队,保定071051

出　　处：《矿产勘查》2012年第1期73-81,共9页Mineral Exploration

基　　金：中国地质调查局2007年度基础性公益性地质调查增量项目(编号:1212010781063)资助

摘　　要：地面高精度磁测目前一般采用质子旋进型磁力仪,其分辨率0.01～0.1nT,经合理的数据处理,能较好地区分矿体与围岩的磁性差异。它不仅能够发现强磁性铁矿床,还能够发现与磁黄铁矿、磁铁矿有共生关系的有色金属、贵金属、稀有金属和非金属等弱磁性矿床[1]。对于寻找隐伏矿床是一种行之有效的方法,可定性、定量地计算出隐伏矿床的产状、埋深、规模及空间展布特征等。该方法因其快速、经济、有效的特点在寻找弱磁性矿床上已得到广泛应用。与其他方法相结合分析将取得较好的找矿效果。The ground high precision magnetic survey now is commonly used type of proton precession magnetometer, of which resolution is 0.01-0.1nT. After suitable data processing, it can be distinguished between the magnetic ore bodies and surrounding rocks. It can not only find that strong magnetic iron ore deposits, but also can find non-ferrous metals, precious metals, rare metals that has a symbiotic relationship with non-metallic deposits pyrrhotite, magnetite and other weak magnetic. It is an effective method to search for concealed deposits in the underlying and can be qualitative, quantitative calculation of the buried deposits of occurrence, depth, size and spatial distribution of the law, etc. Because of its rapid, economical and effective way to find the weak magnetic characteristics of deposits, the method has been widely used. Comb ination with other methods of prospecting will achieve better results.

关 键 词：高精度磁测 磁异常 磁参数 基性-超基性杂岩体 天山成矿带 

分 类 号：P631.2[天文地球—地质矿产勘探]