Abstract:

Three kinds of platinum group minerals （PGMs） are found in the Wengeqi maficultramafic complex in Guyang County, Inner Mongolia. They are sperrylite which occurs together with magnetite and chlorite, and mertieite and kotulskite which occur together with pyrite. Based on field observations and electron microprobe analysis, PGMs mainly occur in websterite, and the websterite is distributed in maficultramafic complex as a dike. The distribution, occurrence and characteristics of PGMs in the Wengeqi maficultramafic complex show that magmatism plays an important role in the formation of platinum group element ore deposits;and the post magmatic hydrothermal fluids also affect on the migration and concentrtion of PGMs.

Key words: platinum group mineral, post magmatic hydrothermal fluid, Wen'geqi mafic-ultramafic complex, Guyang County, Inner Mongolia