矿床地质2025，Vol.44Issue(3)：658-676,19.DOI:10.16111/j.0258-7106.2025.03.008
闽西北解放桥钨矿床成矿物质来源与成矿时代:来自H、O、S同位素分析和锆石、石榴子石U-Pb测年的约束
Ore-forming material source and metallogenic epoch of Jiefangqiao tungsten deposit,northwestern Fujian in China:Constraints from H,O,S isotope analysis and zircon,garnet U-Pb dating
摘要
Abstract
The Jiefangqiao tungsten deposit in northwestern Fujian is a newly discovered deposit in recent years,and it is a skarn-quartz vein type scheelite deposit related to the Late Jurassic granite.The skarn tungsten orebodies oc-cur in marble lens of the Cambrian Lintian Formation;while the quartz vein type tungsten orebodies are hosted within the Neoproterozoic Xiafengyan Formation,including two types of orebodies:Large quartz veins and quartz veinlets.The spatial distribution of tungsten orebodies have the characteristics that the upper part is stra-toid skarn type orebodies and the lower part is quartz vein type orebodies,in a"upper layered and lower vein"mode.In order to study the source of ore-forming materials and metallogenic age,H,O and S isotope analyses were carried out on quartz,pyrite,sphalerite and pyrrhotite formed in quartz-sulfide metallogenic period,and U-Pb dating was carried out on garnet in skarn and zircon in granite and granite porphyry which are related to miner-alization.The results show that:① The δD value is between-72.9‰ and-56.4‰,and the δ18OH2O value is be-tween-3.2‰ and 2.5‰,which is between the magmatic water and the rainwater line,indicating that the ore-forming fluid is mainly derived from the magmatic fluid,in the process of mineralization atmospheric precipita-tion is added;② The δ34S values range from 2.1‰ to 2.9‰,with an average value of 2.65‰,it belongs to mantle-derived sulfur,indicating that the ore-forming materials come from magma;③ The zircon U-Pb weighted aver-age age of the Jiuxianshan syenogranite widely distributed in the mining area is(153.6±1.3)Ma,and the zircon U-Pb weighted average age of the granite porphyry related to mineralization is(149.8±2.2)Ma,and the T-W lower intersection age of garnet in skarn is(150.4±5.3)Ma,indicating that the Jiefangqiao tungsten deposit was formed in the Late Jurassic and is synchronized with the Yanshanian tungsten mineralization in South China.关键词
矽卡岩型-石英脉型/钨矿床/H、O同位素/S同位素/U-Pb测年/晚侏罗世Key words
skarn type-quartz vein type/tungsten deposit/H,O isotope/S isotope/U-Pb dating/Late Jurassic分类
地质学引用本文复制引用
黎敦朋,刘复焜,杨树亮,谢忠龙,黄伟,付一航,陈楠..闽西北解放桥钨矿床成矿物质来源与成矿时代:来自H、O、S同位素分析和锆石、石榴子石U-Pb测年的约束[J].矿床地质,2025,44(3):658-676,19.基金项目
本文得到福建省自然资源科技创新项目"闽西北地区钨矿成矿规律研究"(编号:KY-060000-04-2023-003)资助 （编号:KY-060000-04-2023-003）
