1960•The Canadian MineralogistRequires access

Mineralogy and texture of the manganese ores of Kodur, Srikakulam District, Andhra Pradesh, India

Supriya Roy

Abstract

Reports a systematic study by polished surfaces, etch reactions, and x-ray powder analysis of the manganese ores from the Kodur group of mines in eastern India. Braunite, jacobsite, hausmannite, and pyrolusite are primary minerals, in that paragenetic sequence; secondary low-temperature minerals are cryptomelane, coronadite, and gamma -MnO 2 ; supergene cryptomelane and pyrolusite have been derived by weathering and alteration.

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Available abstract

Key concepts: Pyrolusite, Cryptomelane, Supergene (geology), Manganese, Bixbyite, Weathering, Geochemistry, Geology