地质与勘探2017，Vol.53Issue(2)：259-269,11.
辽宁青城子铅锌矿成矿流体特征和成矿物质来源示踪
Characteristics of Mineralization Fluids and Tracers of Mineralization Material Sources of the Qingchengzi Lead-Zinc Deposit in Liaoning Province
摘要
Abstract
The Qingchengzi lead-zinc deposits are located in the western Liaodong-Jinan rift,a famous mine in Northeast China with complex mineralization.The purpose of this work was to further reveal the characteristics of mineralization fluids and mineralization material sources,Based on geological research of the deposits (Xiquegou,Diannan and Benshan),we have conducted fluid inclusion temperature measurement and laser Raman component analysis,H,O,C,S,and Pb isotope analysis,and established a comprehensive multivariate isotopic tracer system.Results show that the Qingchengzi lead -zinc deposits contain liquid-rich inclusions,locally with three-phase development of H2O-CO2 inclusions.The mineralization temperature range was large,representing the multi-stage (at least two periods) mineralization of evolution.The main mineralization temperature was between 190℃ ～310℃,attributed to medium-temperature mineralization.The ore-forming fluids were of low salinity water with medium temperature.Laser Raman compositional characteristics show that ore-forming fluids generally belong to the CH4-bearing H2O-CO2-NaC1 system,reducing fluids,which have deep sources.The results of hydrogen and oxygen isotope analysis show that the thermal mineralization fluids might come from magmatic water and atmospheric precipitation.Sulfur isotopic characteristics show that the sulfur in orebodies might come from seawater sulfate reduction.The results of carbon and oxygen isotopes suggest that the ore-forming minerals may have originated from strata with late magmatic hydrothermal alteration.Lead isotope results indicate that the lead has a mixed source of strata and magmatic rocks.关键词
青城子铅锌矿/流体包裹体/C同位素/S同位素/Pb同位素/辽东Key words
Qingchengzi lead-zinc deposit/fluid inclusions/C isotope/S isotope/Pb isotopic/Liaoning Province分类
天文与地球科学引用本文复制引用
宋运红,杨凤超,闫国磊,魏明辉,石绍山..辽宁青城子铅锌矿成矿流体特征和成矿物质来源示踪[J].地质与勘探,2017,53(2):259-269,11.基金项目
国家重点研发计划(2016YFC0600108)、中国地质调查局地质调查项目(No.DD20160049)资助. （2016YFC0600108）
