Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Hogbomite from Fe-Ti Deposits of Madangere, Ankola Taluk, Karnataka


Affiliations
1 Department of Geology, Karnataka University, Dharwar 580003, India
2 Institute of Earth Sciences, Free University, De Boelelaan, Amsterdam, Netherlands
     

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Hogbomite analysing 59.94% Al2O3, 6.01% TiO2, 0.21% V2O3, 21.02%, FeO, 0.14%, MnO, 9.66%, MgO and 1.06% ZnO occurs as a widely distributed mineral phase in the vanadiferrous Fe-Ti ore deposits of Madangere area. It occurs in well developed prismatic crystals, and small scales/rods/patches enclosed in magnetite ore grains, and locally as rims to spinel. While the coarse prisms of hogbomite bear characters of primary mineral phase, the small scales/rods/patches appear to represent exsolved phase and that forming rims to spinel is derived by the alteration of spinel. The mineral is reported for the first time from India.
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  • Hogbomite from Fe-Ti Deposits of Madangere, Ankola Taluk, Karnataka

Abstract Views: 150  |  PDF Views: 2

Authors

T. C. Devaraju
Department of Geology, Karnataka University, Dharwar 580003, India
V. H. Uttangi
Department of Geology, Karnataka University, Dharwar 580003, India
J. J. M. M. M. Coolen
Institute of Earth Sciences, Free University, De Boelelaan, Amsterdam, Netherlands

Abstract


Hogbomite analysing 59.94% Al2O3, 6.01% TiO2, 0.21% V2O3, 21.02%, FeO, 0.14%, MnO, 9.66%, MgO and 1.06% ZnO occurs as a widely distributed mineral phase in the vanadiferrous Fe-Ti ore deposits of Madangere area. It occurs in well developed prismatic crystals, and small scales/rods/patches enclosed in magnetite ore grains, and locally as rims to spinel. While the coarse prisms of hogbomite bear characters of primary mineral phase, the small scales/rods/patches appear to represent exsolved phase and that forming rims to spinel is derived by the alteration of spinel. The mineral is reported for the first time from India.