现代地质2023，Vol.37Issue(6)：1435-1448,14.DOI:10.19657/j.geoscience.1000-8527.2023.083
长江中下游成矿带庐枞矿集区花岗岩型铀矿床成矿作用研究进展
Progress on Metallogenic Research of Granite-related Uranium Deposits from Luzong Ore District in the Middle and Lower Reaches of Yangtze River Metallogenic Belt
摘要
Abstract
The Lujiang-Zongyang ore district is one of the most important ore cluster regiones in the Middle and Lower Reaches of the Yangtze River Metallogenic Belt,and is also an important uranium prospecting area in the South China Uranium Province.Systematic uranium metallogenic study would benefit the understanding of the regional metallogenic theory and uranium prospecting.In this paper,we provide a review of the geological fea-tures,uranium-bearing intrusions,magmatic and metallogenic ages,ore-forming fluids,and uranium sources of the typical uranium deposits in the Lujiang-Zongyang ore district.The uranium deposits along the NE-trending A-type granite belt are controlled by intrusive contact,faults,and interlayer structures.The uranium deposits were formed at 114-108 Ma,whereas the ore-bearing granites are A1-type and were formed at 127-123 Ma with 115-110 Ma alkali feldspar granitic stocks.The ore-forming materials were derived from the ore-bearing intrusions and wall-rocks.The ore-forming fluids were the mixture of magmatic water and meteoric water.The uranium was likely originated from the leaching of the ore-bearing intrusions during the fluid circulation,and deposited by changes in the physicochemical condition.The uranium mineralization in the Luzong basin was controlled by concealed syenite and was formed at 131-129 Ma.The ore-bearing intrusions,which provide the ore-material sources,are of shoshonitic and were formed at 131 Ma.The ore-forming fluids were mainly of mag-matic water.The uranium was probably fractionated from the F-B-rich melt into the magmatic fluids,and urani-ferous veins were formed as the pressure and/or temperature dropped.We suggest that the granite uranium fer-tility indicator,high-precision dating of uranium deposits,and the genetic link between mantle-derived material and uranium mineralization are important research topics in future.关键词
庐枞矿集区/花岗岩型铀矿床/铀成矿作用/A型花岗岩/成岩成矿时代/成矿物质来源Key words
Lujiang-Zongyang ore district/granite-related uranium deposit/uranium metallogeny/A-type granite/metallogenic and magmatic age/ore-material source分类
天文与地球科学引用本文复制引用
张舒,张赞赞,胡召齐,施立胜,周涛发,吴明安,杜建国..长江中下游成矿带庐枞矿集区花岗岩型铀矿床成矿作用研究进展[J].现代地质,2023,37(6):1435-1448,14.基金项目
安徽省自然科学基金项目(2208085MD94) （2208085MD94）
国家重点研发计划专题项目(2022YFC2903703-4) （2022YFC2903703-4）
安徽省公益性地质调查项目(2016-g-1-7) （2016-g-1-7）
中国地质调查局地质工作项目(1212011120862). （1212011120862）
