摘要
上元古界青白口系钓鱼台组地层是高纯度石英砂岩含矿层,在此发现矿体一处,二氧化硅品位在90%及以上,呈厚层状产出,资源储量达到大型矿床标准。矿石为灰白色中细粒结构,块状构造。通过对矿石样品、夹层石英砂岩样品的半定量全分析、多项分析等地球化学测试数据的分析,探讨了成矿的物源区特征、古盐度、氧化还原程度以及成矿构造背景,说明了上青沟石英砂岩矿由正常沉积作用形成,为辽东台隆的长英质岩石原始沉积的产物,经历了中等强度的风化作用,沉积环境为被动大陆边缘的滨海环境,钓鱼台组中部石英砂岩是寻找石英砂岩矿的有利部位。研究结果可为类似矿区周边及深部找矿提供科学参考。
The Diaoyutai Formation of the Qingbaikou in the Upper Proterozoic is a high-purity quartz sandstone ore bearing layer.An ore body has been discovered here,with a silica grade of 90%or above,and is produced in thick layers.The resource reserves meet the standards of large mineral deposits.The ore has a gray white medium fine grain texture and blocky structure.Through the analysis of geochemical testing data such as semi-quantitative full analysis and multiple analysis of ore samples and interbedded quartz sandstone samples,the characteristics of the ore-forming source area,paleosalinity,redox degree,and ore-forming tectonic background were explored.It was shown that the Shangqinggou quartz sandstone deposit was formed by normal sedimentation and is a product of the original sedimentation of felsic rocks in Liaodong plate.It has undergone moderate weathering and the sedimentary environment is a passive coastal environment on the continental margin.The quartz sandstone in the middle of the Diaoyutai Formation is an advantageous location for searching for quartz sandstone deposits.The research results can provide scientific references for similar mining areas and deep exploration.
作者
王琦
苗迪
WANG Qi;MIAO Di(School of Earth Sciences and Engineering,Xi an Shiyou University,Xi an 710065,Shaanxi,China;Department of Natural Resources of Jilin Province,Changchun 130042,Jilin,China;Team 602,Bureau of Nonferrous Metals Geological Exploration of Jilin Province,Baishan 134300,Jilin,China)
出处
《吉林地质》
2024年第3期70-77,共8页
Jilin Geology
关键词
石英砂岩
钓鱼台组
地球化学特征
Quartz sandstone
Diaoyutai Formation
geochemical characteristics
