摘要
铀富集成矿在垂向分布上受一定标高控制,形成具上限和下限的空间层带(俗称成矿壳层)。这个层带的出现受构造及地球化学环境的双重控制,下限面为韧脆性构造转换面,铲状断裂系的下铲面,以剥离断层为界面,是岩石温度变化的突变面、构造环境(压、张)反差明显的变化面,也是酸、碱分离及氧化还原交替的地球化学环境变化的转换面,构成铀“成矿壳层”的底面;上限面为古大地水准面,是地壳表面重力向量的势能等值面,它控制了区域侵蚀基准面、潜水面、渗入水的氧化还原渗透面、上升的深部溶液与下降水的混合面,是铀成矿壳层的上界面。
Uranium metallogy is concentrated in certain scope of elevation, and forms a special zone with upward and downward limitation （called lithospheric layer） . The occurrence of this zone is controlled by both tcctonic and geochemic setting. The downward limitation is a transfer layer of ductile structure with the interface of detach structure, abrupt change of geotempreture, change of structure stress （compression and tension）, separation of acid and alkali, geochemical oxidation and reduction, it is the bottom of uranium “metallogenic lithospheric layer” . The upward limitation is the paleo-geoid, it is the iso-surface of gravity potentian energy, which controls the regional base level of erosion, surface of water table, interface of oxidation and reduction of infitration water, interface of mix of ascending deep solution and descending water and the top surface of Uranium “metallogenic lithospheric layer” .
出处
《铀矿地质》
CAS
CSCD
2007年第1期17-22,共6页
Uranium Geology
关键词
铀成矿壳层
热隆构造
剥离断层
古大地水准面
uranium metallogenic lithospheric layer themal upwelling structure
detach fault
paleo-geoid
