甘肃两当杨家坪地区土壤金异常晕与金矿化特征  

Gold anomaly halos of soil and gold mineralizing characteristics in Yangjiaping area,Liangdang County,Gansu Province

作　　者：辛存林[1] 孟健[1] 康鸿杰[2] 

机构地区：[1]西北师范大学地理与环境科学学院,甘肃兰州730070 [2]兰州大学资源与环境学院,甘肃兰州730000

出　　处：《西北师范大学学报（自然科学版）》2010年第1期102-107,共6页Journal of Northwest Normal University(Natural Science)

基　　金：甘肃省自然科学基金资助项目(096RJZA119)

摘　　要：从区域地质背景和矿区地质特征入手,分析了甘肃两当杨家坪地区的土壤金异常晕,结果表明,该区土壤晕分布与构造展布方向相一致,金异常晕对地层的选择性不明显.对化探土壤测量中金、银、铅、锌、砷、汞6种元素指标进行了R型聚类分析和相关性分析,Au和As相关性最高;Ag和Hg关系密切,属同一指标;Au,As,Ag,Hg具有一定相关性,属直接指示元素;Pb,Zn为参考指标.阐明了研究区的金矿化特征,进而从地层、岩性、构造、成矿热液等方面分析了该区的金与多金属成矿地质条件;初步探讨了金矿成因,指出了杨家坪金矿为石英脉型金矿,地层岩性、构造、热液共同控制着金的富集与成矿.From the regional geological setting and geological characteristics of mining area, this paper presents the gold anomaly halos of soil in Yangjiaping, and shows the distribution of soil halos is consistent with the spreading direction of structures, the selectivity of halos to strata is not obvious. Through the R-cluster analysis and correlation analysis of six elements （gold, silver, lead, zinc, arsenic and mercury Which are analysed in geochemical exploration soil survey）, the result shows Au and As is the most relevant, Ag and Hg closely related, they are belonged to the same indicator. And that also shows Au, As, Ag, Hg have a certain degree of relativity, are direct indicator elements; Pb and Zn are reference indicators. At the same time the gold mineralizing characteristics of the research area are clarified, then from stratum, lithology, tectonic, hydrothermal fluids and so on, the geological conditions of gold-polymetallic deposits are analysed. Based on the above studies, the genesis of the gold deposit is concluded and the model of gold deposit is given, the Yangjiaping gold deposit is Quartz veintype gold deposit, and the gold mineralization and mineral enrichment of the deposit are controlled by the stratum, lithology, tectonic.

关 键 词：金异常晕 金矿化 成矿地质条件 

分 类 号：P618.51[天文地球—矿床学]