Development of a positive Eu anomaly during diagenesis

Details Development of a positive Eu anomaly during diagenesis Development of a positive Eu anomaly during diagenesis

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992e%26psl.109..585m&link_type=abstract

Earth and Planetary Science Letters, Volume 109, Issue 3, p. 585-591.

Physics

4

Scientific paper

Diagenetic remobilization of Eu is possible under conditions of reduction to Eu2+ at low oxidation potential and near neutral solution, producing pore waters relatively enriched in Eu2+, as distinct from its trivalent REE neighbours. Eu is reprecipitated in the 3+ state in environments of high oxidation potential. These processes have produced positive Eu anomalies in highly oxidized Pleistocene muds of the Amazon deep-sea fan. Similar occurrences should be rare, but where found they do provide valuable information on local diagenetic processes and conditions.

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