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Element partitioning in ferruginous and pyritic phosphorite from the continental margin off Morocco

Published online by Cambridge University Press:  05 July 2018

J. M. McArthur
J. M. McArthur*
Affiliation:
Department of Earth Sciences, The University, Leeds LS2 9JT
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Summary

Phosphorites from the continental shelf off Morocco have been analysed for major elements and Fe, Mn, V, Cu, Ni, Zn, As, Na, Sr, S, and for carbonate. In pyritic phosphorites Cu, Ni, Zn, and As are present mainly in minor pyrite and organic carbon. In ferruginous phosphorites As, Mn, and V are associated with goethite. In the ferruginous phosphorites Cu, Ni, and Zn may have been introduced in association with organic matter and pyrite during phosphorite formation and been retained during subsequent destruction of these phases by weathering. In all phosphorites Na and Sr are present mainly in carbonate-fluorapatite. Sulphur in the ferru-ginous phosphorites occurs only in carbonate-fluorapatite. In the pyritic samples it is partitioned between pyrite and francolite (carbonate-fluorapatite).

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 322 , June 1978 , pp. 221 - 228
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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