Abstract
During Renzy Mines Ltd. exploration programme in 1972, an iron-formation was found in the Midternæs area north east of Ivigtut, South-West Greenland. It contains up to 32.9% Fe. The dominant mineral is greenalite, with minor amounts of magnetite, siderite and quartz. It was found in the northernmost part of the Ketilidian supracrustals (? 1800 m.y.), which are non-metamorphosed or very weakly metamorphosed. The iron-formation is suggested to be of submarine-exhalative origin, and precipitated in a moderately deep sea at low atmospheric O2 pressure.
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Appel, P.U. On an unmetamorphosed iron-formation in the early precambrian of South-West Greenland. Mineral. Deposita 9, 75–82 (1974). https://doi.org/10.1007/BF00203280
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DOI: https://doi.org/10.1007/BF00203280