赣中西部地区不同岩石类型铀矿化规律

Uranium Mineralization Regularity of Different Rock Types in Central and Western Jiangxi

赣中西部地区铀矿化在沉积变质岩、花岗岩及火山岩中均有分布。通过分析认为,南华—寒武系的泥质、碳质、硅质板岩、碳质千枚岩、变质砂岩、云母片岩为赣中西部地区区域性的富铀地层、含铀岩石;5个产铀花岗岩体化学成分符合一般产铀岩体化学成分规律;火山岩矿化和凝灰岩本底数较高及副矿物铀含量较高相关,不具备铀成矿远景价值。无论是何种岩性的铀矿化都处于一定的良好地质环境中,基底地层大多是区域性的含矿地产;各类岩石中的铀矿化都与长期活动的区域性断裂有关。

The uranium mineralization is distributed in sedimentary metamorphic rocks,granite and volcanic rocks in the central and western Jiangxi.According to the analysis,the argillaceous,carbonaceous,siliceous slate,carbonaceous phyllite,metasandstone and mica schist of the Nanhua-Cambrian system are regional uranium-rich strata and uranium-bearing rocks in the central and western Jiangxi.The chemical compositions of the five uranium-producing granites conform to the general rules of chemical compositions of uranium-producing granites.The mineralization of volcanic rocks is related to the higher basic number of tuff and the higher uranium content of accessory minerals,which do not have the value of uranium mineralization prospect.Uranium mineralization of any lithology is in a certain favorable geological environment,and the basement strata are mostly regional ore-bearing properties.Uranium mineralization in various rocks is related to long-term active regional faults.