ning: 18.0pt; mso-bidi-font-family: 宋体" lang=EN-US>Noble Gas Isotopic Constrains on Mineralization of the Jinchuan Cu-Ni-PGE Sulfide Deposit,
详细信息
- 责任者：Hu Peiqing (Key Laboratory of Western China’s Environmental Systems ; MOE ; Lanzhou University ; Lanzhou 730000 ; China) ; Zhang Mingjie
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(11)
- 关键词：铜矿 ; copper ores ; 镍矿 ; nickel ores ; 铂族元素 ; platinum group elements ; 惰性气体 ; noble gases ; 甘肃 ; Gansu Province
- 页码：p.3375-3386
- 图表：3 illus., 2 tables, 89 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Noble gases are recognized as being exceptional tracers of volatile sources during mineralization. He,Ne and Ar abundances and isotopic compositions from 23 silicate and sulfide separates in the Jinchuan Cu-Ni-PGE sulfide deposit, West China, have been investigated by melting extraction MM5400 mass spectrometer. The results show that 3He/4He ratios in silicate minerals (av. 0.239 Ra) are slightly lower than those in sulfide (av. 0.456Ra),and decrease from olivine (av. 0.291Ra), orthopyroxene (av. 0.215 Ra) to clinopyroxene (av. 0.174Ra). 20Ne/22Ne and 21Ne/22Ne ratios are plotted into the ranges between MORB line and continental crust line.