粤西北连阳岩体北部上坪地区铀矿化特征与找矿标志

Uranium mineralization characteristics and its prospecting criteria in Shangping area of northern Lianyang pluton,northwestern Guangdong

连阳岩体北部上坪地区具有较大的岩体外带型铀成矿潜力。分别介绍了上坪地区赋存于花岗岩体与碳酸盐岩接触带及不同岩性地层接触界面的铀矿化特征,归纳总结了粤西北地区铀矿找矿标志,认为在岩体与碳酸盐岩接触带内,中低温热液硫化物集中产出且综合物化探测量显示"三高一低"的部位,可指示铀异常;在不同岩性的地层接触界面附近,赤铁矿化、褐铁矿化和硅化发育,热液期方解石脉穿插且综合物化探测量显示"三高一低"的部位,可指示铀异常。上述成果可为粤西北地区铀矿找矿工作提供参考。

Shangping area of the northern Lianyang pluton has great metallogenic potential for granite-type uranium deposit.The characteristics of uranium mineralization which hosted on the contact interface between granite and carbonate rocks and different lithologic strata are summarized and the prospecting criteria in the northwest of Guangdong are discussed.It is believed that the middle and low temperature hydrothermal sulfides are produced in the contact zone of the pluton and carbonate rocks,and the comprehensive physical and geochemical exploration bearing the feature of three high and one low part can indicate uranium anomalies.In the vicinity of the contact interface of different lithology,hematite mineralization,browning and silicification,calcite veins interspersed in the hydrothermal period and comprehensive physical and geochemical survey showing the feature of three high and one low part can indicate uranium anomalies.The above results can provide references for uranium prospecting in northwest Guangdong province.