Characteristics of Titanium-bearing Inclusions Found in Corundum of the Luobusa Podiform Chromitite, Tibet

The titanium-bearing alloy and titanium-bearing oxide inclusions in corundum collected from Luobusa podiform chromitite in Tibet are focused here. The EDS and EPMA analyses show that the Ti-N alloys are rounded or forming a quincunx with the size of 17μm×35μm; the Ti-B alloys are long columnar in size of 10μm×58μm; the authigenic and exnotopic Ti-C alloys are 40μm×50μm; the Ti-Si-P and Ti-Si-Fe alloys occur as highly heterogeneous melt in the corundum and the Ti-Al-Zr oxides are pretty pure in composition. Considering the unusual ultra-high pressure mantle mineral groups like diamond and moissanite recovered from the Luobusa chromitite, it is suggested that the corundum and its special mineral inclusions might form at the high-pressure deep mantle environment.

Key words: Mineral Inclusion; Corundum; Chromitite; Kangjinla; Tibet