Improved Molybdenite Re-Os Dating Method and Its Application
详细信息
- 责任者：Li Jing (Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 5 10640 ; China) ; Sun Yali
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(2)
- 关键词：辉钼矿 ; molybdenite ; 铼—锇计时 ; Re-Os dating
- 页码：p.642-648
- 图表：3 tables, 27 refs.
- 分类号：1300
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
This paper simplified the chemical separation of Re and Os using concentrated HNO3 for digestion of molybdenite．Based on the negligible level of common Os relative to radiogenetic 187Os in molybdenite，a common Os standard was used as spike，and as a result, Os isotopic mass fractionation during ICP-MS measurements could be on-line corrected，improving the quality of analytical data．This method was validated using national certified molybdenite standards，and the results were well consistent with the certified values．Using this method for determination of molybdenite sampled from Xingping skarn-type Mo deposit，Liangyang granite composite，reasonable Re-Os age data have been obtained．