高校地质学报2018，Vol.24Issue(2)：185-199,15.DOI:10.16108/j.issn1006-7493.2017080
沙子江铀矿外围地化特征、元素迁移及铀成矿机理
Geochemistry,Element Migration and Mechanism of Uranium Mineralization in the Periphery of the Shazijiang Uranium Ore Deposit
摘要
Abstract
The uranium content has positive correlations with the abundance of SiO2,CaO,Fe2O3,LOI and HREEs and Na is almost depleted at the mineralization and alteration positions of a drill core in the Shazijiang uranium ore-deposit. In trace element spider diagram and REEs distribution pattern diagram, the shapes of different mineralized and altered belt samples are very similar. The REEs distribution pattern shows that LREEs are enriched and the distribution lines are lean to right. Compared with the fresh surrounding rocks, the altered surrounding rocks have elevated Sb and U concentrations and a few more Ni and W concentrations. Compared with the fresh surrounding rocks and altered surrounding rocks,the cataclastic granites(ore)have significantly increased Cd and Sb concentrations,while W,Ni and Pb concentrations increase slightly,and Be and Bi concentrations reduce sharply.Compared with the fresh surrounding rocks,cataclastic granites(ore)and the altered surrounding rocks are characterized by significantly increased Sb and U concentrations and Sb,Cd and U concentrations,respectively.In addition,both W and Ni increase slightly.Research of element migration in mineralization and alteration belts shows that Sb,LOI,CaO,Ni,Cu,In and Sr moved in,of which Sb has the largest positive mobility value.In contrast,Na2O,FeO,Be,Cs,Th and Nb all moved out,of which Na2O has the largest negative mobility value.Based on the results and discussion of geochemistry and element migration,we deduce that the granitic surrounding rocks are one of the most important sources of uranium and other components,and the ore-forming fluid is alkaline with high oxygen fugacity.关键词
沙子江铀矿床/矿化蚀变/地球化学/成矿机理Key words
Shazijiang uranium ore-deposit/mineralization and alteration/geochemistry/mechanism of mineralization分类
天文与地球科学引用本文复制引用
王正庆,范洪海,陈东欢,郑可志,罗桥花,刘军港,王凤岗,王勇剑..沙子江铀矿外围地化特征、元素迁移及铀成矿机理[J].高校地质学报,2018,24(2):185-199,15.基金项目
中核集团项目"南方重点花岗岩型铀矿基地资源预测和扩大,2016～2018年" （）
中国地质调查局项目"整装勘查区找矿预测与技术应用示范,2014～2016年"(12120114052401)联合资助 （12120114052401）
