Rare earth element and neodymium isotopic compositions of the banded iron-formations and associated shales from Hamersley, western Australia

Details Rare earth element and neodymium isotopic compositions of the banded iron-formations and associated shales from Hamersley, western Australia Rare earth element and neodymium isotopic compositions of the banded iron-formations and associated shales from Hamersley, western Australia

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57..187a&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 57, no. 1, p. 187-204.

Other

16

Abundance, Geochemistry, Hydrothermal Systems, Iron Ores, Neodymium Isotopes, Precambrian Period, Rare Earth Elements, Shales, Australia, Dolomite (Mineral), Iron Oxides, Sampling, Weathering

Scientific paper

Major-element, trace-element, and Nd isotopic compositions were determined for the early Proterozoic banded iron formations (IFs) from the Hamersley Basin (Australia). The data place some constraints on the composition of the early Proterozoic oceans. It was found that the MgO contents measured in the IFs and those of modern metalliferous sediments are very similar. This implies either approximately constant amounts of seafloor hydrothermal alteration relative to ocean volumes or a higher continental Mg flux into the oceans during the Archean.

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