研究产在蛇绿混杂岩中的豆荚状铬铁矿矿床成因，对创新铬铁矿成矿理论和探索地幔演化均具有重要意义。通过洋脊扩张-俯冲带-弧后扩张系统的壳-幔物质循环，那些发生循环的豆荚状铬铁矿有可能与新生铬铁矿团块伴生在同一个蛇绿混杂岩中，造成豆荚状铬铁矿成因研究的复杂性。系统研究铬铁矿包裹的PGM (Platinum Group Mineral)和其它矿物包体，为豆荚状铬铁矿成因研究提供重要新途径。在变质过程中，铬铁矿的微量元素会发生重新分配，变质流体可以导致PGM重结晶并形成一些次生矿物相（包括铂族元素合金、次生PGM）。本项目以新疆萨尔托海豆荚状铬铁矿矿床为研究对象，重点研究：1）豆荚状铬铁矿矿床成因；2）厘定铬铁矿中的PGM和其它包体矿物，研究其形成机制；3）研究豆荚状铬铁矿经历的变质改造过程，以及在此过程中形成的矿物组合，探索变质过程中铂族元素的地球化学行为。

Study on podiform chromitite in ophiolite melange is important for the development of ore-forming theory as well as for understanding of mantle evolution. The recycled podiform chromitites may accompany the newly-formed podiform chromitite in one ophiolite belt due to crust-mantle recycle system via a mid-ridge, subduction zone, and back-arc system. This caused complexities for the origin of chromitites even in one chromitite deposit. Studies on inclusions such as platinum group mineral (PGM) enclosed in chromite could provide a usuful way to illustrate the genesis of the podform chromitite. Trace elements in chromitite could be re-set during metamorphism. Metamorphic fluid could cause recrystallization of PGM and form some new minerals such as alloys of platinum group elements and secondary PGM. This project choose the Sartohay chromitite as a studying target with major aims of: (a) studying the genesis of podiform chromitite, (b) identifing the PGMs and related inclusions in the Sartohay chromitite, illustrate their evolutional histories and geological significance; (c) studying on metamorphic processes overprinted on the Sartohay chromitite, and the mineral phases formed during metamorphic and hydrothermal processes, illustrating the geochemical bahaviors of platinum group elements and other trace elements.