Distribution and Mobility of Platinum‐Group Elements in the Late Cretaceous Ni‐Laterite in the Northern Oman Mountains

Low‐grade Ni‐laterite deposits are irregularly developed overlying mafic/ultramafic protoliths in the northern Oman Mountains. Concentrations, distribution patterns, and mobility of platinum‐group elements (PGEs) are investigated in some Ni‐laterite profiles from the Oman ophiolite as potential unco...

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Bibliographic Details
Published in:Journal of geophysical research. Solid earth 2021-10, Vol.126 (10), p.n/a
Main Authors: Al‐Khirbash, Salah A., Ahmed, Ahmed H.
Format: Article
Language:English
Subjects:
Alloys
Chemical elements
Chromite
Chromium oxides
Clay
Correlation
Cretaceous
Deposits
Distribution
Distribution patterns
Elements
Ferric oxide
Geochemistry
Igneous rocks
Iron
Laterites
Mobility
Mountains
Nanoalloys
Nanoparticles
Nickel
Ni‐laterite
Oman ophiolite
Palladium
Platinum
platinum‐group elements (PGEs)
Tropical climate
ultramafic index of alteration (UMIA)
Weathering
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Summary:Low‐grade Ni‐laterite deposits are irregularly developed overlying mafic/ultramafic protoliths in the northern Oman Mountains. Concentrations, distribution patterns, and mobility of platinum‐group elements (PGEs) are investigated in some Ni‐laterite profiles from the Oman ophiolite as potential unconventional PGE resource. The ultramafic protoliths display the lowest PGE contents (average total = 35 ppb) that are similar to the PGE contents in the overlying saprolite zones. The PGE content increased upward in the laterite profile, where the highest total PGE contents (∼253 ppb) are recorded in the oxide and ferricrete/clay‐rich zones. The highest PGE content corresponds to Pt > Ru > Pd, while the lowest PGE content mostly corresponds to Os 
ISSN:2169-9313
2169-9356
DOI:10.1029/2021JB022363