个旧矿区高松矿田断裂特征分析  

Analysis of fault characteristics of Gaosong ore field in Gejiu tin deposits

作　　者：郑德志 杨荣森 田源 倪春中[1] ZHENG Dezhi;YANG Rongsen;TIAN Yuan;NI Chunzhong(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093

出　　处：《有色金属（矿山部分）》2020年第4期70-75,共6页NONFERROUS METALS(Mining Section）

基　　金：国家自然科学基金资助项目(40902058)。

摘　　要：通过观测高松矿田内F7断层构造面几何特征、运动学性质及其两侧节理测量与统计,表明F7断层为一右行扭性逆断层,并总结出研究区域内F7断层附近区域节理构造的发育特征,优势节理倾向为南东130°±5°和北西310°±5°,南北向节理不发育。通过共轭节理实测,获得16组节理数据,进行赤平投影分析,得到受北西—南东向与北东—南西向应力作用明显,而东西向应力作用不明显。在前人矿田构造研究基础上,将研究区构造活动分为四期,即:南北向挤压应力形成于印支晚期—燕山早期,北西—南东方向应力形成于燕山中晚期,北东—南西向挤压应力形成于喜山早期,而东西向挤压力形成于喜山晚期,其中燕山中晚期为成矿时期。通过对矿田断裂特征分析研究,为反演矿区构造演化史及找矿勘查工作提供理论和实际资料依据。According to the observation of the geometric features of the structural plane,kinematic properties of the F7 fault in the Gaosong ore field mine and the statistics and measurements of the joints in the nearby area,it is indicated that the F7 fault was a right torsional reverse fault,and the development characteristics of the joints in the area around the F7 fault in the study area were summarized,the dominant joint inclination was SE130°±5°and NW310°±5°,joints were not developed in N-S direction.Through the measurement of conjugate joints,16 sets of joint data were obtained,the analysis of the equatorial projection showed that the NW-SE and NE-SW stresses were obvious,but the EW stress was not obvious.On the basis of previous studies on ore-field structure,the tectonic activities in the study area were divided into four phases,namely:the NS compressive stress was from late Indosinian to early Yanshanian,the NW-SE stress was in the middle and late Yanshanian period,the NE-SW compressive stress was formed in the early Himalayan,the EW pressure was formed in the late Himalayan period;Among them,the middle and late Yanshanian were the metallogenic period.Through analyzing and studying the fault characteristics of the orefield,the above provides help for the analysis of the structural evolution history of the mining area and the prospecting work.

关 键 词：共轭节理 断裂构造特征 构造应力 构造运动 高松矿田 

分 类 号：P62[天文地球—地质矿产勘探]