Platinum-group element (PGE) geochemistry of the Emeishan basalts in the Pan-Xi area, SW China
作者: Hong ZhongWeiguang ZhuLiang QiMeifu ZhouXieyan SongYi Zhang
作者单位: 1Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences
2Department of Earth Sciences, University of Hong Kong
3Geological Team 106, Bureau of Geology and Mineral Resources of Sichuan Province
刊名: Chinese Science Bulletin, 2006, Vol.51 (7), pp.845-854
来源数据库: Springer Nature Journal
DOI: 10.1007/s11434-006-0845-6
关键词: BasaltsPGEsulfidesPan-Xi area
英文摘要: Abstract(#br)The Longzhoushan and Ertan basalts in the Pan-Xi area were generated by relatively low degrees of partial melting (< 7%), during which Ir, Ru, and Rh are compatible while Pt and Pd are incompatible. Most of these samples have high PGE concentrations and much higher Pd/Ir and Cu/Pd ratios than those of primitive mantle. A small amount of sulfides (∼0.007%) remained in the mantle source during partial melting, whereas part of the magmas reached sulfide saturation and segregated PGE-rich sulfides (∼0.020%–0.033%) during ascent period. Osmium, Ir, and Pt could form platinum-group metallic alloys hosted in chromites or sulfides during fractional crystallization process, leading to the decoupling of Pt and Pd contents and considerable variations of Ir contents. Sulfides segregated...
全文获取路径: Springer Nature  (合作)
影响因子:1.319 (2012)

  • geochemistry 地球化学
  • PGE Professional Group-Education
  • element 元素
  • group