摘要
广西金秀地区有大量的断裂带型铜矿,这些矿床虽然规模小,但数量多,品位高,具有相同或相似的地质特征。对赋存在SN向断裂内几个石英脉型铜矿地质特征进行分析。这些矿体在水平面上具有串珠状和深部具有连续分布的特征,在垂向上具有上部氧化矿深部原生矿的结构模式。矿石中铜和其他金属矿物含量丰富、在垂向上具分带现象。综合区域地质研究认为,该区地层至少经历了加里东期和燕山期的熔融,使得金属元素逐渐富集。在燕山晚期分馏出的成矿热液沿SN向断裂充填成矿。在喜山运动时,NW和少量EW向断裂左行走滑破坏了前期矿脉。
There is a large number of hydrothermal copper deposits of quartz-vein-type in Jinxiu area , Guangxi. Geological characteristics of these deposits are similar to each other, such as small scale,and high grade. The author has analyzed their geological characteristics of several quartz-vein-type copper deposits hosted in the SN faults in this paper. The ore bodies are beaded in the horizontal level in the surface and are continuous in the deep place. The oxidized ore is in the upper place and primary orebodies are in the deep place in the vertical. The ore metal mineral zonation is obvious in the vertical profile. The basement strata in the area had been influenced at least by magmatism in Caledongian and Yanshan period in which the metal elements are enriched gradually. The ore-forming hydrothermal fluid from magma had been fractionated out to fill into the SN faults. In the Himalayan movement,the previous ore bodies were cut and destroyed by NW fault and a small amount of EW fractures with left-lateral slip characteristics.
作者
李社宏
粟阳扬
严松
丁安军
廖红为
韦龙明
LI Shehong;SU Yangyang;YAN Song;DING Anjun;LIAO Hongwei;WEI Longming(Key Laboratory of Geological Engineering Centre of Guangxi,Guilin University of Technology,Guilin 541006,Guangxi,China;Bowen College of Management Guilin University of Technology,Guilin 541006 Guangxi,China)
出处
《矿产与地质》
2018年第1期67-73,共7页
Mineral Resources and Geology
基金
广西地勘基金项目"桂北九万大山地区韧性剪切带与锡矿成矿关系研究"(桂地矿综研[2018]43)资助
关键词
石英脉型铜矿
地质特征
矿床成因
金秀地区
大瑶山
广西
quartz-vein-type copper deposit
geological characteristics
genetic analysis
Jinxiu area
Dayaoshan
Guangxi
