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首页> 外文期刊>Geochemistry, geophysics, geosystems >Rock magnetic investigation and its geological significance for vein-type uranium deposits in southern China
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Rock magnetic investigation and its geological significance for vein-type uranium deposits in southern China

机译：中国南方静脉型铀矿床岩石磁力研究及其地质意义

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摘要

To characterize the metallogenic environment of a typical vein-type uranium deposit, samples from diabase dykes, alteration zones including metamorphic diabase and uranium ore, and granites were systematically investigated for six boreholes from southeastern China. Rock magnetic results indicate that coarse-grained magnetites (pseudosingle domain, PSD, and multidomain, MD) are dominant magnetic carriers in diabase. In contrast, the uranium ore is dominated by fine-grained magnetites (superparamagnetic, SP, and single-domain, SD). The concentration of magnetic particles in fresh granites is low. Magnetic properties of metamorphic diabases exhibit much greater variability of magnetic properties and higher degrees of sulfuration than unaltered diabase and granite, due to contact metasomatism and reduction effects close to the vein. Compared with diabase, magnetic remanence of the uranium ore is much lower, but displays much higher stability. The Koenigsberger ratio Q peaks in the uranium ore with a value of similar to 1.00. Using the systematic rock magnetic results to constrain the interpretation, the contribution of the intersection zone of diabase dyke and silicified fault to magnetic anomalies was further modeled, and the effects of the ore body are significant for magnetic exploration. Overall, rock magnetic investigations of vein-type uranium deposit provide a better understanding of the interactions between different rock types, and further facilitate regional magnetic surveys on the ground.
机译：为了表征典型的静脉型铀矿床的成矿环境，从东南部的六个钻孔系统地研究了催化型铀矿床的样品，包括变质玻璃酶和铀矿床，花岗岩，以及花岗岩。岩石磁性结果表明，粗粒磁纤维（假阳粉结构域，PSD和多麦粉，MD）是铝糖基的主要磁性载体。相反，铀矿以细粒磁铁矿（超顺磁，SP和单域，SD）为主。新鲜花岗岩中的磁性颗粒的浓度低。变质糖浆酶的磁性特性表现出比未妨碍的玻璃体和花岗岩的磁性和花岗岩具有更大的磁性变异性和较高的硫化物，因此靠近静脉的缩小效果。与玻璃胺相比，铀矿石的磁遗弃要低得多，但稳定性更高。铀矿中的Koenigsberger比率Q峰值，值类似于1.00。利用系统岩石磁性结果来约束解释，进一步建模了Diabase Dyke的交叉区和硅片滤滤器的贡献，矿体对磁性勘探的影响是显着的。总体而言，静脉型铀矿床的岩石磁性研究能够更好地了解不同岩石类型之间的相互作用，并进一步促进地面的区域磁性调查。

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    Ge Kunpeng; Liu Qingsong; Deng Juzhi; Nobes David; Wang Yang; Wang Yanguo; Chen Xiao;

  • 作者单位

    East China Univ Technol Sch Geophys &

    Measurement Control Technol Nanchang Jiangxi Peoples R China;

    South Univ Sci &

    Technol China Dept Marine Sci &

    Engn Shenzhen Peoples R China;

    East China Univ Technol Sch Geophys &

    Measurement Control Technol Nanchang Jiangxi Peoples R China;

    East China Univ Technol Sch Geophys &

    Measurement Control Technol Nanchang Jiangxi Peoples R China;

    Guangdong Prov Nucl Ind Geol Bur 293 Dadui Guangzhou Guangdong Peoples R China;

    East China Univ Technol Sch Geophys &

    Measurement Control Technol Nanchang Jiangxi Peoples R China;

    East China Univ Technol Sch Geophys &

    Measurement Control Technol Nanchang Jiangxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 地球物理学;
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