Constraint of mantle partial melting on PGE mineralization of mafic-ultramafic intrusions in Eastern Tianshan: Case study on Tulargen and Xiangshan Cu-Ni deposits
地幔部分熔融程度对东天山镁铁质-超镁铁质岩铂族元素矿化的约束——以图拉尔根和香山铜镍矿为例

Ni-Cu sulfide mineralization occurred in series of mafic-uhramafic complexes in Eastern Tianshan.These deposits, however,failed to reach economic level for PGE,and some of the samples have lower PGE compositions even than primitive mantle. Low PGE contents can be caused in two ways:(1)sulfide segregation happens so early that a great deal PGE removed along with sulfide in the early stage of magma evolution;(2)because of low partial melting,large part of PGE remains in primitive mantle,so only little PGE goe...