粤东桃源地区中新生代构造演化与铀成矿  

Tectonic evolution of mesozoic and uranium mineralization in the taoyuan area,eastern Guangdong Province

作　　者：孙中瑞 李伟林 彭渤洋 李海东 尹征平 SUN Zhong-rui;LI Wei-lin;PENG Bo-yang;LI Hai-dong;YIN Zheng-ping(Research Institute NO.290,CNNC,Shaoguan 512000)

机构地区：[1]核工业二九○研究所

出　　处：《矿产勘查》2019年第8期1899-1906,共8页Mineral Exploration

基　　金：中国核工业地质局基础地质项目(编号:201925)资助

摘　　要：利用节理构造、擦痕滑动矢量反演法等构造应力场研究方法,结合区内地质特征及区域构造演化,系统分析了桃源地区构造应力作用的方向和期次,进行构造应力场期次的划分,推测区内由早至晚经历了近SN向挤压、近EW向挤压、近EW向拉张、NW-SE向的挤压、NW-SE向拉张等主要构造应力作用。初步探讨了区域构造应力场演化与铀成矿作用之间的关系,进而预测铀富集成矿的有利构造部位。认为区内的NEE、NWW向断裂为近EW向挤压应力产生的一组共轭断裂,具有相似的成矿潜力。前人探索较少的NWW向断裂,为下步找矿重点。In this study,tectonic stress field research methods such as joint structure,scrape sliding vector inversion method are used.Combined with the geological characteristics and regional tectonic evolution of the mining area,the direction and time of tectonic stress in Taoyuan area are systematically analyzed.Near-EW-extrusion,near-EW-extension,NW-SE-extrusion,and NW-SE-toextension-to-tensional distribution,Secondary tectonic stress.The relationship between regional tectonic stress field evolution and uranium metallogenesis is preliminarily discussed,and the favorable tectonic site of uranium enrichment is predicted.It is concluded that the NEE and NWW trending faults in the region are one of the near EW compressive stresses Group,which has similar mineralization potentials.Previous researches have explored fewer NWW trending faults,which are the focus of ore prospecting.

关 键 词：桃源地区 构造演化 构造应力场 铀成矿 花岗岩型铀矿床 

分 类 号：P619.14[天文地球—矿床学]