焦家成矿带北段地质特征与黄铁矿特征研究  

Geological characteristics and pyrite characteristics of the northern Jiaojia metallogenic belt

作　　者：柏瑞 崔美慧 张琪 胡跃亮 张姗[2] 李肖 陈晓燕 BAI Rui;CUI Meihui;ZHANG Qi;HU Yueliang;ZHANG Shan;LI Xiao;CHENG Xiaoyan(Shandong Gold Geology and Mineral Exploration Co.,Ltd.,Laizhou 261400,Shandong,China;Shandong Gold Group Co.,Ltd.,Jinan 250000,Shandong,China)

机构地区：[1]山东黄金地质矿产勘查有限公司,山东莱州261400 [2]山东黄金集团有限公司,山东济南250000

出　　处：《矿产勘查》2022年第2期174-181,共8页Mineral Exploration

基　　金：国家重点研发计划项目(2016YFC0600600)资助。

摘　　要：焦家成矿带是胶东金矿集区最重要的控矿断裂之一,随着矿产勘查程度不断的提高,其-2000 m以浅的勘查找矿工作已基本完成。本文以宏观→微观的研究思路对焦家成矿带北段-2000 m以浅的成矿地质特征进行了总结,为深部找矿工作提供参考。文章构建了焦家成矿带北段主断裂面三维模型,其三维延伸表现出舒缓波状的特征。区内蚀变岩是构造岩经热液交代改造而成的,故呈带状分布,且蚀变岩厚度与矿体厚度表现为正相关的特征;区内矿化类型有两种,一种是蚀变岩型矿化,另一种为石英脉型矿化;研究区-600~-1257 m范围内矿体的主要载金矿物黄铁矿的电子探针数据表明黄铁矿总体表现为亏铁亏硫型,Au与S/Fe比值呈一定的相关性,大致表现为S/Fe比值越高Au含量越低,反之Au含量越高。Jiaojia metallogenic belt is one of the most important ore controlling faults in Jiaodong gold concentration area. With the continuous improvement of mineral exploration degree, the exploration and prospecting work less than-2000 m has been basically completed. Based on the macro-micro research idea, this paper summarizes the metallogenic geological characteristics of the north section of Jiaojia metallogenic belt with a depth of-2000 m, so as to provide reference for deep prospecting. The three-dimensional model of the main fault surface in the north section of Jiaojia metallogenic belt is constructed. Its three-dimensional extension shows a gentle wave shape. The thickness of cataclastic rock is positively correlated with the thickness of ore body, and the altered rock is distributed in a belt on the basis of tectonic rock;There are two types of mineralization in the area, one is pyrite sericite quartz altered rock type mineralization, the other is quartz vein type mineralization;The electron microprobe data of pyrite, the main gold bearing mineral of the ore body within-600~-1257 m in the study area, show that pyrite is generally iron and sulfur deficient, and there is a certain correlation between Au and S/Fe ratio. It is generally shown that the higher the S/Fe ratio, the lower the Au content, and vice versa.

关 键 词：焦家带北段 主断裂面 矿化类型 黄铁矿 

分 类 号：P618.51[天文地球—矿床学]