新疆西昆仑特格里曼苏砂岩型铜矿地质特征及成因探讨  

Geological characteristics of Teglimansu sandstone-hosted copper deposit in west Kunlun Mountains in Xinjiang and the genetic discussion

作　　者：曾威[1] 孙丰月[2] 张雪梅[3] 万多[2] 许庆林[2] 

机构地区：[1]天津地质调查中心,天津300170 [2]吉林大学地球科学学院,长春130061 [3]大港油田第一采油厂,天津300280

出　　处：《地质找矿论丛》2012年第3期284-290,共7页Contributions to Geology and Mineral Resources Research

摘　　要：特格里曼苏铜矿产于库山河群(C1k)砂岩中,矿体呈层状、似层状产出,受地层控制,浅色砂岩与紫色砂岩的交互带是铜矿体产出的最有利层位。通过对含矿砂岩胶结物的研究,认为赋矿砂岩中胶结物类型主要有碳酸盐胶结、硅质胶结、泥质胶结和铁质胶结4种,常见的胶结物组合类型有碳酸盐-硅质胶结组合、碳酸盐-泥质胶结组合、硅质-泥质胶结组合、铁质-泥质-碳酸盐胶结组合;矿化常发生于具碳酸盐-硅质胶结组合的砂岩中,铜矿物与硅质胶结物伴生。通过对含矿砂岩胶结物中流体包裹体研究,得到成矿流体为低温、低盐度流体。认为矿床成因为沉积成岩成因,古陆的风化剥蚀提供了基本的成矿物质,沉积物的搬运沉积形成了矿源层,成岩作用时期由于有机质及细菌的作用、氧化还原条件的改变,在成岩流体的迁移下造成了铜质的局部再富集,形成具有工业意义的铜矿体。Teglimansu copper deposit is hosted by （C1k） sandstone of Kushanhe Group in Akto county, Xinjiang Autonomous Region. The ore body is controlled by stratum occurring in multi-layers and layeroid form. Alternated zone of light and purple sandstone layers are favorable horizons of the copper ore body. There are 4 types of main cementing materials in the sandstone, i.e. carbonate, siliceous, argillaceous and ferruginous cementing materials and carbonate-siliceous, carbonate-argillaceous, siliceous- argilla ceous and ferruginous- argillaceous- carbonate cementing associations are common. Mineralization often occurs in sandstone with carbonate - siliceous association. Copper minerals are associated with siliceous cement. Reaserch of fluid inclusions in the cements shows that ore fluid is in low temperature and low sa- linity and the copper deposit is considered a sedimentary ore deposit. Weathering and erosion of paleo-con-tinent supply materials for transportation and laid-down of ore source bed. During diagenesis of the bed organic matter and bacterium incorporated and redox condition changed and copper was remobilized by dia-genetic fluid resulting in local enrichment of copper and industrial ore bodies formed.

关 键 词：特格里曼苏 砂岩型铜矿 沉积成岩成因 流体包裹体 西昆仑 新疆维吾尔自治区 

分 类 号：P613[天文地球—矿床学] P618.41[天文地球—地质学]