Re-Os Dating: Constraints on Mineralization Age of Magmatic Cu-Ni refix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Sulfide Ore
详细信息
- 责任者：Qu Wenjun (National Research Center for Geoanalysis ; Beijing 100037 ; China) ; Chen Jiangfeng
- 刊名：Mineral Deposits
- 出版年：2012
- 卷期：31(1)
- 关键词：铜矿 ; copper ores ; 镍矿 ; nickel ores ; 铼—锇计时 ; Re-Os dating
- 页码：p.151-160
- 图表：3 illus., 1 table, 35 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
Through Re-Os isotopic studies of world-class ore deposits,the authors have found that the apparent Re-Os ages sometimes are consistent with or close to the mineralization age,but sometimes are inconsistent or even fail to be obtained. On the basis of these models,massive ores of mafic-ultramafic rock associated Cu-Ni sulfide deposits would yield geologically meaningful Re-Os age while pseudo-isochron would often be obtained for disseminated ores. Disseminated ores usually yield geologically meaningful initial Os isotopic ratio,whereas massive ores would yield geologically meaningless apparent initial 187Os/188Os ratio, except for a few cases.