地质论评2025，Vol.71Issue(3)：1029-1045,17.DOI:10.16509/j.georeview.2024.10.055
江南钨矿带东段长岭尖钨多金属矿床成矿年代、成矿流体特征及成因分析
Oreforming age,oreforming fluid characteristics,and genesis of the Changlingjian tungsten polymetallic deposit in the eastern Jiangnan Tungsten Metallogenic Belt
摘要
Abstract
The Changlingjian deposit is a newly discovered tungsten polymetallic deposit,which located in the eastern sector of the Jiangnan tungsten belt(JTB).The Re-Os dating of molybdenite in the Changlingjian deposit yielded a weighted average age of 133.8±1.3 Ma,indicating the mineralization is genetically related with the coeval muscovite granite beneath the deposit.After detailed geological and petrographic characteristics,we subdivided the mineralization process from W—sulfide—quartz(stage Ⅰ),sulfide—quartz(stage Ⅱ)to calcite—quartz(stage Ⅲ).The temperature and salinity calculation results of the three-stage fluid inclusions show that,there are decreasing temperature and salinity degrees from stage Ⅰ(281～386℃,0.70％～10.11％NaCleq),stageⅡ(186～317℃,0.70％～4.03％NaCleq)to stage Ⅲ(156～202℃,0.70％～2.07％NaCleq).The δ34S values of sulfides from stages Ⅰ and Ⅱ range from-4.5‰ to 2.8‰.Mineralized coexisting quartz fluid inclusions(Stage Ⅰand Stage Ⅱ)δ D ranges from-70.3‰ to-58.3‰,and the δOH2O value obtained from the conversion of Oquartz in quartz ranges from-0.1‰ to 4.8‰.Those stable isotopic characteristics infer that the ore-forming fluid was dominantly from magmatic fluid with some meteoric water added,and increasing meteoric water ratios along the fluid evolution.The precipitation of tungsten in the Changlingjian deposit is mainly controlled by fluid immiscibility,while the precipitation of sulfide minerals is mainly controlled by fluid mixing.Combined with reginal research,the ore-forming fluid in Changlingjian deposit has similar character with most tungsten deposits in JTB,which were consistently source from ore-forming granitoid intrusions,with mixing a small amount of meteoric water.关键词
Re-Os同位素定年/流体包裹体/H—O同位素/S同位素/江南钨矿带Key words
Re-Os isotope dating/fluid inclusion/H—O isotopes/S isotopes/Jiangnan Tungsten Belt引用本文复制引用
王静,张达玉,张飞,翁望飞,许红兵,孟翔,杨华炜,周涛发..江南钨矿带东段长岭尖钨多金属矿床成矿年代、成矿流体特征及成因分析[J].地质论评,2025,71(3):1029-1045,17.基金项目
本文为国家自然科学基金资助项目(编号:42472099、41972076)、安徽省自然资源厅科技项目(编号:2021-K-9、2023-K-17)和安徽省公益性地质工作项目(编号:2021-g-2-11)的成果. This paper is funded by the National Natural Science Foundation of China(Nos.42472099,41972076),the science and Technology Project of the Department of Natural Resources of Anhui Province(Nos.2021-k-9,2023-k-17)and the public geological work project of Anhui Province(No.2021-g-2-11) （编号:42472099、41972076）
