岩矿测试2016，Vol.35Issue(5)：550-557,8.DOI:10.15898/j.cnki.11-2131/td.2016.05.014
吉林长安堡钼（铜）矿床成矿时代及物质来源：来自辉钼矿Re －Os 同位素证据
Origin and Geochronology of Chang ’anpu Mo-Cu Deposit in Jilin Province:Constraints from Molybdenite Re-Os Isotope Systematics
摘要
Abstract
The east-central part of Jilin Province,located on the continental margin of northeast China along the eastern Xing-Meng orogenic belt,hosts more than 10 large-and medium-scale Mo deposits. The major types of mineralization include porphyry, skarn,and quartz vein types.The Chang’anpu Mo-Cu deposit is a newly discovered large-scale porphyry deposit in central Jilin Province;the age of mineralization is unknown.The geological characteristics of the deposit were investigated and molybdenite Re-Os isotope dating was applied, to constrain the age of mineralization.The molybdenite Re-Os model ages range from 167.3 ±2.4 to 168.7 ±2.4 Ma with a weighted mean model age of 168.0 ±1.0 Ma.The isochron age is 168.0 ±6.2 Ma,which indicates that the Chang’anpu Mo-Cu deposit was formed in the Middle Jurassic, belonging to the large-scale Yanshanian molybdenum metallogenic period of North China.The Re content of the molybdenite varies from 25.17 to 34.80 μg/g,suggesting that the ore-forming materials may come from a crust-mantle mixed source and mainly from the crustal source. Combining published molybdenite Re-Os and zircon U-Pb ages in east-central Jilin Province,suggests that the Mo mineralization occurred in the Early-Middle Jurassic (167 -196 Ma),thereby providing a scientific basis for Mo resources prospecting in Jilin.关键词
辉钼矿/Re -Os 同位素测年/中侏罗世/长安堡钼(铜)矿床/吉林中部Key words
molybdenite/Re-Os isotopic dating/middle Jurassic/Chang’anpu Mo-Cu deposit/central Jilin Province分类
天文与地球科学引用本文复制引用
松权衡,邢树文,张勇,李超,王岩,于城..吉林长安堡钼（铜）矿床成矿时代及物质来源：来自辉钼矿Re －Os 同位素证据[J].岩矿测试,2016,35(5):550-557,8.基金项目
中央级公益性科研院所基本科研业务费专项资金（K1503）；国土资源部成矿作用与资源评价重点实验室开放基金（ZS1404）；中国地质调查局项目 （）
