Some Precambrian banded iron-formations (BIFs) from around the world: Their age, geologic setting, mineralogy, metamorphism, geochemistry, and origins

2005/10/01 by C. Klein · 37 citations
Earth and Planetary Sciences · #Geochemistry and Elemental Analysis #Geological and Geochemical Analysis #Paleontology and Stratigraphy of Fossils

paper · doi:10.2138/am.2005.1871

Abstract

Banded iron-formations (BIFs) occur in the Precambrian geologic record over a wide time span. Beginning at 3.8 Ga (Isua, West Greenland), they are part of Archean cratons and range in age from about 3.5 until 2.5 Ga. Their overall volume reaches a maximum at about 2.5 Ga (iron-formations in the Hamersley Basin of Western Australia) and they disappear from the geologic record at about 1.8 Ga, only to reappear between 0.8 and 0.6 Ga. ...

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