元素比值在嫩江—黑河地区金成矿预测的应用初探  

Application of Element Ratios in Gold Metallogenic Prediction in Nenjiang Heihe Area

作　　者：符安宗 余欣朗 李成禄 杨文鹏 杨元江 郑博 赵瑞君 FU Anzong;YU Xinlang;LI Chenglu;YANG Wenpeng;YANG Yuanjiang;ZHENG Bo;ZHAO Ruijun(Heilongjiang Institute of Natural Resources Survey,Harbin 150036,Heilongjiang,China;Heilongjiang Provincial Geology and Mineral Resources Test and Application Institute,Harbin 150036,Heilongjiang,China)

机构地区：[1]黑龙江省自然资源调查院,黑龙江哈尔滨150036 [2]黑龙江省地质矿产实验测试研究中心,黑龙江哈尔滨150036

出　　处：《黄金科学技术》2022年第6期822-834,共13页Gold Science and Technology

基　　金：黑龙江省重点研发计划项目“黑龙江省大型二道坎银矿资源综合利用及成矿作用研究”(编号:GA21A204);黑龙江省国土资源科研项目“黑龙江省嫩江—黑河构造混杂岩地区成矿规律研究与找矿预测”(编号:201603)联合资助。

摘　　要：为探讨元素比值在金成矿预测中的应用,在收集嫩江—黑河地区1/25万区域化探数据的基础上,对数据进行标准化处理,计算Au元素与前缘晕元素和尾晕元素的比值,以及前缘晕元素与尾晕元素的比值。以(0.1~0.2)lg C对数间距绘制地球化学等值线图,分析Au元素和特征元素比值的分布特征,结合已有金矿的分布规律圈定找矿靶区。结果表明:经标准化消除量纲后,特征元素比值的平均值分布区间范围为0.60~15.58,相差不大,便于统计分析和勾绘地球化学等值线图。根据已有金矿在Au元素和特征元素比值地球化学等值线图上的分布特征,共圈定出7个成矿靶区。研究表明:将元素比值应用于金成矿预测中,取得了良好的效果,这为嫩江—黑河地区寻找金矿提供了科学依据,为区域找矿研究提供了新思路。In order to explore the application of element ratio in gold metallogenic prediction,based on the collection of 1∶ 250 000 regional geochemical exploration data in Nenjiang-Heihe area,the data were standardized with the abundance of upper crust,and the ratios of Au to front halo elements and tail halo elements and the ratios of front halo elements to tail halo elements were calculated. Then,the geochemical parameters of each element and the ratios of characteristic elements were counted,their geochemical characteristics were analyzed.The geochemical contour map of Au and the ratios of characteristic elements at a logarithmic interval of(0.1~0.2)lg C was drawn,and the distribution characteristics of them were summarized.Finally,combined with the distribution law of existing gold deposits and the distribution characteristics of gold deposits on the geochemical isoline map of various variables,we delineated the prospecting target area. The results show that after the dimensionality is eliminated by standardization,the average value range of characteristic element ratios is 0.60~15.58,with little difference,which is convenient for statistical analysis and geochemical isoline drawing. And the spatial distribution characteristics of characteristic element ratios are closely related to the distribution of existing gold deposits. Their high background and high value areas have obvious northeast and northwest distribution trends,and some have north-south and east-west distribution trends,it is consistent with the distribution direction of existing gold mines. According to the distribution characteristics of existing gold deposits on the geochemical contour map of Au and the ratios of the characteristic element,a total of 7 metallogenic targets are delineated.The study shows that the element ratio has achieved a certain effect in the prediction of gold mineralization,which provides a scientific basis for the search for gold deposits in Nenjiang-Heihe area and a new idea for the study of new prospecting methods.

关 键 词：元素比值 金矿 成矿预测 地球化学方法 区域找矿 嫩江—黑河地区 

分 类 号：P618.51[天文地球—矿床学]