综合物化探测量在花岗岩型铀矿找矿中的应用——以粤北江湾地区为例
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核工业二九0研究所

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P619.14

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中国核工业地质局项目(202339-5、202438-5)


Application of Comprehensive Geophysical and Geochemical Surveys in Granite-Type Uranium Ore Prospecting—A Case Study of the Jiangwan Area in Northern Guangdong
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Research Institute No.290, CNNC

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    摘要:

    江湾地区地处南岭成矿带中段的大东山复式岩体内,铀成矿地质条件优越,但区内物化探工作程度偏低,地表及深部的综合找矿标志仍有待完善。为评价大东山岩体江湾矿床外围区域的铀成矿潜力,并探寻地面伽玛能谱测量、分量化探测量在该地区的应用效果,现采用二者组合测量方式,重点调查船洞断裂束与F4-1号带交错夹持部位的物化探异常特征。结果显示,能谱铀与分量铀异常的空间复合性良好,可直接反映铀矿化信息;同时,结合聚类分析及相关性分析,确定铀、铍、钡为找矿核心指示元素,并辅以稀土元素综合指数构成该地区铀矿找矿指示组合;通过多方法的相互论证,初步构建了研究区“源-运-储”铀成矿过程。最终基于综合异常指数,预测铀成矿有利地段一片,经槽探工程累计揭露工业矿段1.13m,验证了该物化探方法组合的有效性。上述成果可为大东山岩体铀矿勘查提供科学有效的数据支撑和技术依据,建议优先于F13号带与F4-1号带交汇部位开展钻探验证。

    Abstract:

    The Jiangwan area is situated within the Dadongshan Composite Pluton in the central segment of the Nanling Metallogenic Belt. Favorable geological conditions for uranium mineralization are developed in this area. However, low intensity of geophysical and geochemical exploration is presented in the region. Comprehensive prospecting criteria for both surface and deep uranium orebodies are not yet well established. This study is designed to comprehensively evaluate the uranium metallogenic potential of the peripheral area of the Jiangwan Deposit. The application effect of ground gamma-ray spectrometry and partial extraction geochemical prospecting survey in local uranium exploration is also assessed. A combined survey scheme of the two techniques was adopted in this study. Geophysical and geochemical anomalies in the intersection and clamping zone between the Chuandong Fault Bundle and F4-1 Fault Zone were mainly investigated. High spatial coincidence is shown between spectral uranium and sequential extraction uranium anomalies. Uranium mineralization information is directly reflected by both sets of anomalies. Uranium, beryllium and barium are identified as core prospecting indicators via cluster and correlation analysis. A uranium prospecting indicator assemblage for the study area is formed, with the comprehensive rare earth element enrichment index as a supplementary parameter. Through the integrated demonstration of multiple methods, the “source-migration-trapping” uranium metallogenic process in the study area has been preliminarily established.. One favorable uranium mineralization segment is delineated based on the comprehensive anomaly index. An industrial ore section with a cumulative thickness of 1.13 m was uncovered by trenching works.The effectiveness of this combined method is verified by field results. Scientific and reliable data support and technical basis for uranium exploration in the Dadongshan Composite Pluton are provided by these findings. Drilling verification is recommended to be prioritized at the intersection of the F13 and F4-1 Fault Zones.

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张凡颖,胡鹏,王家跃,等. 综合物化探测量在花岗岩型铀矿找矿中的应用——以粤北江湾地区为例[J]. 科学技术与工程, , ():

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  • 收稿日期:2026-01-05
  • 最后修改日期:2026-05-30
  • 录用日期:2026-07-17
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