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2002•Journal of Mineralogy and PetrologyRequires access

STUDY ON MANGANESE MINERALS OF E′RENTAOLEGAI SILVER DEPOSIT

Pai Zhang

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Abstract

Pyrolusite,cryptomelane,coronadite,psilomelane,nsutite manganese spar,manganite and manganocalcite were found in the E′rentaolegai silver deposit.Silver occurred in form of minerals in the cryptomelane,coronadite,psilomelane with minor silver absorbed in the manganese minerals.The manganese oxides and the manganese hydroxides were formed in the process of manganese calcite decomposition and the nsutite was probably crystallized in the hydrothermal system.Manganite and manganocalcite were crystallized in later hydrothermal stage.

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What this paper is about

Pyrolusite,cryptomelane,coronadite,psilomelane,nsutite manganese spar,manganite and manganocalcite were found in the E′rentaolegai silver deposit.Silver occurred in form of minerals in the cryptomelane,coronadite,psilomelane with minor silver absorbed in the manganese minerals.The manganese oxides and the manganese hydroxides were formed in the process of manganese calcite decomposition and the nsutite was probably crystallized in the hydrothermal system.Manganite and manganocalcite were crystallized in later hydrothermal stage.

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Available abstract

Pyrolusite,cryptomelane,coronadite,psilomelane,nsutite manganese spar,manganite and manganocalcite were found in the E′rentaolegai silver deposit.Silver occurred in form of minerals in the cryptomelane,coronadite,psilomelane with minor silver absorbed in the manganese minerals.The manganese oxides and the manganese hydroxides were formed in the process of manganese calcite decomposition and the nsutite was probably crystallized in the hydrothermal system.Manganite and manganocalcite were crystallized in later hydrothermal stage.

Key concepts: Cryptomelane, Pyrolusite, Manganese, Manganite, Hydrothermal circulation, Supergene (geology), Calcite, Ferromanganese

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