江西金山金矿田朱林西金矿床矿体原生晕特征

朱林西金矿床位于金山金矿田的中北部,是与韧-脆性剪切带有关的石英脉型、蚀变岩型金矿床。在综合研究和利用矿区以往地质地球化学资料基础上,选取矿区40号勘探线为典型地质剖面,对该剖面坑探工程控制的Ⅰ号金矿带进行系统采样和数据分析与统计计算。利用相关分析、聚类分析、因子分析方法,确定了金矿床的原生晕组合特征。通过绘制和分析原生晕元素轴向异常分布图和叠加图、地球化学参数计算图,初步归纳了矿床构造叠加晕总体特征,并分析了矿体原生晕特征的地质意义以及对深部盲矿体预测的应用。研究认为:As与Au关系密切,As、Sb和Hg为金矿体的前缘指示元素组合;Pb、Zn、Cu分布于矿体周围,为矿体的近矿晕指示元素组合;Mo、Mn和Co元素为矿体的尾晕元素组合;尾晕的反带异常、前缘晕与尾晕叠加等特征对深部盲矿体预测有重要指示作用。

Primary halo characteristics of ore bodies in Zhulinxi Gold Deposit in Jinshan Gold Field of Jiangxi Province

Zhulinxi Gold Deposit is located in central north of Jinshan Gold Field,which is a quartz vein and al-tered rock type gold deposit that is associated with the ductile-brittle shear zone. Based on the comprehensive research and analysis of geological and geochemical data,the paper completes the system sampling in the mining area with the No. 40 exploration line as typical geological profile. After systematic sampling and statistical calculation of samples from No. 1 gold belt controlled by the profile probing project,the characteristics of the primary halo assemblage of the gold deposit are determined by correlation analysis,cluster analysis and factor analysis. Finally,the paper tentatively summarizes the general characteristics of the superimposed halo of the deposit by drawing and analyzing the axial a-nomaly distribution map of the primary halo superimposition and geochemical parameters calculation map. Based on the above analysis,the metallogenic geological significance of the primary halo characteristics and its application to the prediction of the deep blind ore bodies are analyzed. The results are as follows:As and Au are closely related;As,Sb and Hg are the front indicator elements for gold deposits;Pb,Zn and Cu are the association of near ore halo indicator elements of the ore bodies,which are distributed around the ore bodies;Mo,Mn and Co elements are the element asso-ciation of the rear halo of the ore bodies;The rear halo have the characteristics of the reverse zoning,front edge halo and rear halo mutual superposition and so on,which contribute to the prediction of deep blind ore bodies.