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《Journal of Guilin Institute of Technology》 2001-01
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Platinum-group elements(PGE) in mantle harzburgites from Xigaze ophiolites,Tibet

YU Heng xiang 1,2 ,XIA Bin 2,MEI Hou jun 2,QI Lang 3,TU Xiang lin 2 1(1. Department of Resource and Environmental Engineering, Guilin Institute of Technology, Guilin 541004,China; 2. Guangzhou Institute of Geochemistry, Chinese Academy of Scie  
The harzburgites from Xigaze ophiolites in Tibet are relicts of the partial melting upper mantle. The total w (PGE) amounts of them are (28 37~50 67)×10 -9 , slightly higher than those of mantle peridotites in the primitive mantle, and typical ophiolites in the world, and the Alps-type mantle peridotites. They have relatively high total w (PGE) amounts and are enriched in Pt, Pd, Ru, Ir to Primitive Mantle. Their PGE distribution patterns belong to the positively inclined- or swallow-type patterns different from those of the mantle peridotites of partial melting relict origin. Relative enrichment in Pt and Pd, as well as in the incompatible elements such as Cu, Au, Cs, Rb, Ba, Th, U and LREE, and U-type REE patterns, indicates that the partial melting-derived relict harzburgits from Xigaze ophiolites have experienced intensive permeating and mixing processes of the melt and fluid both containing abundant incompatible elements.
【Fund】: 国家自然科学基金!项目 (4 9772 10 9) ;; 国家科技部“国家重点基础研究发展规划”九七三项目! (G19990 432 0 4) ;; 国家攀登预选项目!
【CateGory Index】: P588.3
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