摘要
广渡—横溪火山盆地是一个继承式火山沉陷盆地,其火山岩主体是由一套中酸-酸性火山碎屑岩、火山熔岩以及火山碎屑沉积岩组成,区内断裂构造、火山构造发育、热液活动强烈,具有较好的铀成矿地质条件。盆地内铀矿集中分布于呈北西向排列的3个集中区内,矿床(点)、矿化点受制于北西、北东向主干断裂交汇的构造结点和低序次火山构造,矿体产于主干断裂的次级断裂、裂隙带以及与火山构造相关的断裂中,矿体对围岩的岩性没有选择性。铀矿化主要受北西向断裂构造、低序次火山构造、鹅湖岭组和石溪组之间的角度不整合面等因素控制。分析认为盆地的石人底、石狮岗、花厅等地具有较好的找矿前景。
Guangdu-Hengxi volcanic basin, a inherited volcanic graben basin, which is mainly composed of acid-acidic pyroclastic rocks,lava and pyroclastic sedimentary rocks. In this region, faults and volcanic structures are developed, uranium mineralization has good geological conditions. Basin uranium was mainly distributed in three concentration areas aligned NW, deposits, sub-deposits are controlled by the structural knot points of north-west, northeast main faults and the lower level volcanic structures, ores are occured in the secondary faults, fissure zone of the main faults, and the faults related with volcanic structures, ore has no selectivity to the lithology. Mineralization is mainly controlled by the north-west direction structure, lower level volcanic structures and angle unconformity be- tween E＇ huling formation and Shixi formation. Analysts believe that there are good prospectings in the shirendi, shishigang and Huating area.
出处
《东华理工大学学报（自然科学版）》
CAS
2016年第3期223-228,共6页
Journal of East China University of Technology(Natural Science)
基金
中国核工业地质局铀矿地质项目“江西乐安县相山地区铀矿资源调查评价与勘查”(201650)
中国地质调查局项目“赣杭成矿带中段铀矿资源调查评价”(12120115018201)
关键词
铀成矿地质特征
控矿因素
找矿方向
广渡—横溪火山盆地
geological characteristics of uranium metallogenesis
ore-controlling factors
prospecting direction
Guangdu-Hengxi volcanic basin
