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    安徽黄梅尖地区铀成矿地球物理特征及找矿预测

    Geophysical characteristics and prospecting prediction of the uranium mineralization in Huangmeijian area, Anhui Province

    • 摘要: 安徽黄梅尖地区位于庐枞火山岩盆地东南缘,区内铀成矿地质条件优越。成矿类型是与碱性岩有关的低温热液型铀矿,铀矿化受地层、断裂、岩浆岩及热液活动控制。通过开展地面伽玛能谱、伽玛总量、激发极化法等综合物探方法,进一步研究了黄梅尖地区典型铀矿床(点)的地球物理特征,认为该区铀矿床(点)一般位于伽玛偏高、能谱铀异常场—高场梯度带上,含矿断裂的电性特征表现为低阻高极化。通过总结该类铀矿床(点)的地质特征,圈定了黄梅尖岩体成矿远景区和8413矿床东侧成矿远景区,为下一步寻找同类型铀矿有利地段提供参考。

       

      Abstract: The Huangmeijian area of Anhui Province, located in the southeastern margin of Lujiang-Zongyang volcanic basin, has superior geological conditions for uranium mineralization. The metallogenic type is epithermal uranium deposit related to alkaline rocks, and the uranium mineralization is controlled by strata, faults, magmatic rocks and postmagmatic hydrothermal activities. To study the relation between uranium mineralization and geophysical characteristics in this area, the geophysical characteristics of typical uranium deposits/occurrences are studied by comprehensive geophysical prospecting methods such as ground γ-ray spectrometric survey, gamma total measurement and induced polarization (IP). The results show that the uranium deposits/occurrences are generally located in the gamma high field and energy spectrum uranium anomaly field to high field gradient zone, with the electrical characteristics of low resistance and high polarization for ore-bearing structure faults. By summarizing the geological-geophysical characteristics of uranium deposits (occurrences) of this type, two metallogenic prospect areas are delineated, which provides basis for further work and reference for prospecting the same type of uranium deposits.

       

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