龙首山芨岭铀矿床含矿主岩特征及铀矿床成因讨论
Discussion on the Characteristics of Ore-bearing Rock and the Genesis of the Jiling Uranium Deposit
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摘要: 龙首山岩浆活动带是以典型碱交代矿床为特点的铀成矿带，大型矿床往往是以发育大型碱交代作用为前提。芨岭铀矿床属于加里东-华力西期与俯冲作用有关的岩浆热液组合。该区加里东早期和华力西期花岗岩，分别是祁连洋向北俯冲及陆内俯冲的产物。笔者经长期野外研究，通过大量显微镜下观察、常量、微量元素和同位素测定等室内分析与综合，对芨岭铀矿床花岗岩含矿主岩主要特征及铀矿床成因作一初步总结。Abstract: The Longsushan magmatic activity belt is a uranium metallogenic belt characterized by typical alkali-metasomatite uranium. The large ore deposit is always closely related to alkali-metasomatism. The Jiling uranium deposit is attributed to Galedonian-Variscan magmatic hydrothermal fluids related to subduction. The Galedonian and Hercynian granites are respectively the products of northward and intracontinental subduction of Qilian ocean plate. According to the long-term field study and indoor comprehensive analysis (including microexamination, trace element and isotopic measurement), the characteristics of ore bearing rock and the genesis of the Jiling uranium deposit have been summarized in this paper.
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