chrome spinel

chrome spinel

[¦krōm spə′nel]
(mineralogy)
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These provide the usual gemmological constants, but also some welcome additions such as a glossary of gemmological terms and special sections on chrome spinel, feldspar, garnet and ivory.
Also mineralization in rocks consist: Chrome spinel , Iron--titanium,chalcopyrite, burnit, malachite ,azurite and iron minerals.
Small euhedral to subhedral crystals of chrome spinel or, locally, magnetite are scattered throughout the groundmass.
Deep drilling will be performed at other magnetic targets, some of which have produced significant indicator minerals, including a pyrope garnet at one locality and chrome spinel from all the anomalies.
Traces of initial minerals like Olivine, Orthopyroxene, and Chrome Spinel are observed in the form of isolated islands.
Harzburgites have granular, amorph granular and Milonite textures and amorph Olivine 70-80%), amorph Orthopyroxene (15-25%), Clinopiroxine (5%) and Chrome Spinel (less than 2%) and Menitite crystals are seen in their mineralogy composition.
The dominant mineral phases are identified as pyrite, chalcopyrite, galena, pentlandite, cobaltite and chrome spinel. The high concentration of Ni, Cr and Co and mineral content in the studied samples suggests that the mafic-ultrmafic rocks of the Teru, Yasin, Pakora and Bagrot areas along the Shyok Suture Zone have high potentials for metallic mineralization.
The ultramafic cumulates in the WO include wherlite (olivine, diopside with enstatite, magnetite and chrome spinel as accessories), harzburgite (olivine, enstatite, with minor accessroes of diopside and chrome spinel), and dunite (olivine with minor clinopyroxene); wherlite being the most common and dunite being the least.
Olivine and chrome spinels from the ultramafic rocks of the WO have been analyzed for mineral chemistry.