• 责任者：Chen Jianlin (State Key Laboratory of Isotope Geochemistry ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Xu Jifeng
• 刊名：Acta Petrologica Sinica
• 出版年：2011
• 卷期：27(9)
• 关键词：含矿带 ; ore-bearing zones ; 斑岩 ; porphyry ; 岩石地球化学 ; lithogeochemistry ; 云南 ; Yunnan Province
• 页码：p.2733-2742
• 图表：6 illus., 1 table, 89 refs.
• 分类号：0801
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

Porphyry Cu-Mo-Au deposits occur not only in an arc setting, but also in a collisional belt. These ore-bearing porphyries in different tectonic settings have distinctly different geochemistry in trace elements, implying that they have different compositions in source or dynamic mechanisms. Comparing with collisional-type ore-bearing porphyries, the subduction-type rocks have obviously high HREE and Y concentrations, low Sr/Y, (La/Yb)N and (Dy/Yb)N ratios, suggesting that their source are mainly consisted of amphibole but less or no garnet. The geochemistry of major and trace elements of ore-bearing porphyric rocks in Pulang-Xuejipin is similar to that of the subduction-type. They are likely the products by partial melting of metasomatized mantle wedge by subduction fluid or sediment, trigged by slab break-off of westward-subduction of Ganzi-Litang Ocean, instead of by direct partial melt of an oceanic slab.