Critical elements in supergene phosphates: the example of the weathering profile at the Gavà Neolithic Mines, Catalonia, Spain

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Please use this identifier to cite or link to this item: http://hdl.handle.net/11703/120712
Title: Critical elements in supergene phosphates: the example of the weathering profile at the Gavà Neolithic Mines, Catalonia, Spain
Authors: Consorci del Museu de Ciències Naturals de Barcelona
Issue Date: 18-Dec-2019
Keywords: Fosfats
Erosió
Spatial coverage: Gavà (Catalunya)
Can Tintorer (Gavà, Catalunya : Jaciment arqueològic)
Access to document: http://hdl.handle.net/2072/366988
Citation: Minerals 2020, 10, 3
Extent: 25 p.
Abstract: The essential role of Critical Elements (CE) in 21st century economy has led to an increasing demand of these metals and promotes the exploration of non-conventional deposits such as weathering profiles. The present work is focused on the study of a weathering profile located at the Archaeological Park of the Gavà Neolithic Mines, Barcelona, Catalonia, Spain. In the Gavà deposit, acid and oxidising meteoric fluids generated intense weathering during the early Pleistocene, affecting series of Llandoverian black shales and associated syn-sedimentary phosphates. The circulation of these acid fluids at deeper levels of the profile generated supergene vein-like mineralisations comprised of secondary phosphates (e.g., variscite, perhamite, crandallite, phosphosiderite) and sulphates (e.g., jarosite, alunite). This supergene mineralisation is significantly enriched in certain CE (e.g., Ga, Sc, REE, In, Co and Sb) that were mobilised from host rock components and later hosted in the crystal lattice of supergene minerals. Weathering processes and corresponding supergene enrichment of CE at the Gavà deposit could be used as an example to determine exploration guidelines of CE in weathering profiles and associated supergene phosphates worldwide. Keywords: critical elements; weathering; supergene mineralisation; phosphates; Gavà
Terms of use: CC-BY
Appears in Collections:Petrologia / Articles

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