Evaluation of metallogenic potential of the Nuggihalli greenstone belt,South India |
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| Authors: | Sachinath Mitra Maibam Bidyananda |
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| Institution: | Department of Geological Sciences, Jadavpur University, Kolkata 700032, India |
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| Abstract: | Chromite from the north–south-trending schist belt of Nuggihalli (southern Karnataka), belonging to the greenstone belt of South India (3.0–3.5 Ga) and crystallising at 1178 °C under oxygen fugacity of ?6.67 shows komatiitic affinity. The chemical data of the Cr-spinels when plotted in the form of the discriminant function of Johan (1979) show a remarkable follow-up of the curve A, which delineates the boundary between the ‘barren’ and ‘fertile’ (with respect to the plausible presence of sulphide phases) Cr-spinel bodies. Only a few samples plot marginally within the barren region (Fig. 1), suggesting that the chromite bands should hardly hold the possibility of becoming host of sulphide mineralisation of commercial relevance. |
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| Keywords: | Chromite Metallogenic potential Greenstone belt South India Chromite Potentiel métallogénique Ceinture de roches vertes Sud de l'Inde |
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