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Banded sulphide ores: The experimental production of monomineralic sulphide bands in sediments

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Summary

Banded sulphide ores of the McArthur River type are characterized by large numbers of conformable, monomineralic sulphide bands. These appear to have formed prior to consolidation of the host sediments. This paper describes a series of laboratory experiments designed to test the possibility that the bands could have been generated by the migration of metal, sulphide, and possibly carbonate ions through unconsolidated sedimentary materials or slowly settling suspensions. It is concluded that ionic migration processes probably occur during the formation of these banded sulphide ores, in conjunction with the deposition of metalliferous mud layers.

Zusammenfassung

Die Schichten der Schwefelerze des Typs vom McArthur Fluß sind charakterisiert durch eine Vielzahl von Parallelen, die ausschließlich aus Schwefelschichten bestehen. Diese scheinen sich vor der Verfestigung der Sedimentenmasse gebildet zu haben. Dieser Aufsatz beschreibt eine Reihe von Laboratoriums-Experimenten, die die Möglichkeit untersuchen sollten, ob diese Schichten entstehen konnten durch die Wanderung von Metall-, Schwefeloder möglicherweise Kohlensäure-Ionen durch noch nicht verfestigtes oder sich langsam setzendes Sedimentmaterial. Es wird daraus gefolgert, daß wahrscheinlich während der Formation dieser Schwefelerz-Schichten in Verbindung mit der Ablagerung metallhaltiger Schlammlagen Ionenwanderungen stattfinden.

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Lambert, I.B., Bubela, B. Banded sulphide ores: The experimental production of monomineralic sulphide bands in sediments. Mineral. Deposita 5, 97–102 (1970). https://doi.org/10.1007/BF00208055

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  • DOI: https://doi.org/10.1007/BF00208055

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