CAJ | 학술논문

浙江大桥坞矿床是赣杭火山岩铀成矿带重要的铀矿床之一。本文通过对大桥坞铀矿床铅、氢和氧同位素及前人资料的综合研究，探讨了矿床成矿流体和成矿物质来源。结果表明花岗斑岩、凝灰岩、辉绿岩、矿石中黄铁矿、蚀变围岩中黄铁矿的Ph同位素组成变化较小，可能指示它们具有相似的源区。在铅同位素构造环境判别图解中，铅同位素投影点分布范围较广，但多数集中于地幔和造山带演化线之间，偏向造山带，反映了铅的来源与岩浆活动有关。氢、氧同位素组成显示，成矿流体主要来自大气降水。成矿物质来源于壳幔混合源。
절강대교오광상시공항화산암유성광대중요적유광상지일。본문통과대대교오유광상연、경화양동위소급전인자료적종합연구，탐토료광상성광류체화성광물질래원。결과표명화강반암、응회암、휘록암、광석중황철광、식변위암중황철광적Ph동위소조성변화교소，가능지시타문구유상사적원구。재연동위소구조배경판별도해중，연동위소투영점분포범위교엄，단다수집중우지만화조산대연화선지간，편향조산대，반영료연적래원여암장활동유관。경、양동위소조성현시，성광류체주요래자대기강수。성광물질래원우각만혼합원。
Daqiaowu deposit is one of the important uranium deposits located in the Ganzhou-Hangzhou metallo- genetic belt of volcanogenic uranium deposits. Based on studying of the lead, hydrogen and oxygen iso- topes and predecessors data of the deposits, this paper discussed the origin of the ore-forming fluid and source of ore-forming materials of the deposits. The Pb isotopic compositions of pyrites from granitel poiphyry, tuff, diabase, ore and altered wall rocks show a slight variation, implying that the Pb isotopes may have analogous origins. In the Pb isotopes tectonic setting discrimination diagram, the plots of lead iso- topes show a widespread distribution range, but mostly concentrate between mantle evolution curve and orogenic belt evolution curve, indicating that the source of lead isotopes is related with magmatism. The hydrogen and oxygen isotope compositions show that the ore-forming fluid is originated from the meteoric water. The ore-forming materials are mainly derived from the crust-mantle mixed source.