华南地质2025，Vol.41Issue(3)：529-540,12.DOI:10.3969/j.issn.2097-0013.2025.03.005
卫宁北山地区多金属矿床成矿物质来源的H-O-S-Pb同位素示踪
Ore-forming Material Source Tracing of Polymetallic Ore Deposits in the Weining Beishan by H-O-S-Pb Isotope Composition
摘要
Abstract
The Weining Beishan area is an important polymetallic ore-forming region in Ningxia,characterized by favorable metallogenic geological conditions.For a long time,numerous scholars have conducted research to some extent on the sources of polymetallic ore-forming materials and the characteristics of ore-forming fluids in this area.However,there are differing interpretations,with the main debate centering on whether the ore-forming materials and fluids originate from strata or deep intermediate-acidic intrusions.In this paper,19 samples were collected from the Errenshan silver-lead deposit,the western end of the Juepishan iron deposit,the Lüweibawan iron deposit,the Xinzhaobishan iron deposit,and the Wucheliang iron deposit.Hydrogen,oxygen,sulfur,and lead isotope tests were conducted,and the results were combined with previous H-O-S-Pb isotope data from the area.The findings indicate that the δ18OV-SMOW values of quartz in the deposits range from 15.5‰to 22.8‰,the δD values range from-31‰to-86.5‰,the δ34S values of sulfides range from+3‰ to+17‰,the 206Pb/204Pb ratios range from 18.345 to 21.277,the 207Pb/204Pb ratios range from 15.414 to 15.752,and the 208Pb/204Pb ratios range from 38.449 to 42.524.The H-O isotope test results suggest that the ore-forming fluids in the Weining Beishan area are predominantly metamorphic water or exhibit a trend of evolution toward meteoric water,indicating that the ore-forming fluids are metamorphic in origin and have incorporated some meteoric water.The S-Pb isotope analysis results show that the sulfur isotopes are consistent with the characteristics of crustal sulfur,and the lead isotopes also exhibit clear features of crustal lead,suggesting that the ore-forming materials are primarily derived from the crust.Therefore,the genesis of polymetallic deposits in this area may be attributed to tectonic movements causing dehydration of deep strata and then forming metamorphic fluids.Combined with the participation of meteoric water,these fluids circulated and enriched metallic elements from the strata,ultimately forming deposits in structurally favorable zones.关键词
成矿物质来源/成矿流体/H-O-S-Pb同位素组成/矿床成因/宁夏卫宁北山Key words
source of ore-forming materials/ore-forming fluid/H-O-S-Pb isotope/ore genesis/the Weining Beishan area,Ningxia分类
地质学引用本文复制引用
陆茂欣,汪栋刚,潘进礼,李通,马彦云,何庆志,王成,马立荣..卫宁北山地区多金属矿床成矿物质来源的H-O-S-Pb同位素示踪[J].华南地质,2025,41(3):529-540,12.基金项目
宁夏自然科学基金项目(2023AAC03770)、2023年度宁夏回族自治区青年科技托举人才项目培养项目、中国矿产地质志项目(编号:DD20221695、DD20190379、DD20160346)、宁夏中卫市卫宁北山地区多金属矿勘查资料汇总研究及钻探验证(NDDK201502)和宁夏战略性矿产资源储备调查与评价(DD20190828-05) （2023AAC03770）
