辽东地区金地球化学异常评价  

Evaluation of gold geochemical anomalies in the East Liaoning area

作　　者：徐山[1] 潘海滨[1] 刘长纯 汪志刚[1] 

机构地区：[1]吉林省第一地质调查所,吉林长春130033 [2]辽宁省地质矿产调查院,辽宁沈阳110034

出　　处：《吉林地质》2015年第2期93-99,共7页Jilin Geology

摘　　要：本文在研究区域地球化学异常特征及其与地质背景关系的基础上,指出:金质量分数变化规律主要地质因素是辽河群的盖县组、大石桥组以及中生代侵入岩的发育程度。应用因子分析、聚类分析等数学方法,确定白云、猫岭、五龙及小佟家堡子等典型矿床中典型异常的元素组合类型:白云金矿床为Au-As-Sb,猫岭金矿床Au-As-Bi-Mo,五龙金矿床Au-As-Bi-W,小佟家堡子金床Au-As-Bi-Mo-Sb。在已圈定的金地球化学异常中,应用多元统计分析方法优选出62处矿致异常,同时依据典型异常的元素组合类型,将矿致异常分成4种异常类型,分类结果为:白云式金地球化学异常4处,猫岭式金地球化学异常36处,五龙式金地球化学异常11处,小佟家堡子式金地球化学异常11处。By researching regional geochemical characteristics and the relationship with the geological background, the author points out that： the main factors causing high background of Au geochemical anomalies are Gaixian and Dashiqiao formation of Liaohe group, intrusions of Mesozoic intermediate-acid intrusive rocks. The elements combination types of typical anomalies are determined by using factorial analysis, cluster analysis and other mathematical methods with the combination of elements association in typical anomalies： the composite anomaly of Baiyun gold deposits is Au-As-Sb, Maoling gold deposit is Au-As-Bi-Mo, Wulong gold deposits is Au-As-Bi-W, Xiaotongjiapuzi gold deposit is Au-AsBi-Mo-Sb. By using multivariate statistical analysis method, 62 ore-caused anomalies are preferred in Au geochemical anomalies delineated. On this basis, the 62 anomalies are divided into 4 kinds of anomaly type reference to elements combination types of typical anomalies, the classifi cation results of ore-caused anomalies are： 4 geochemical anomalies of Baiyun type, 36 geochemical anomalies of Maoling type, 11 geochemical anomalies of Wulong type, 11 geochemical anomalies of Xiaotongjiapuzi type.

关 键 词：辽东地区 地球化学异常 定量评价模型 

分 类 号：P618.51[天文地球—矿床学] P622.3[天文地球—地质学]