Article de revue (2017)
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Abstract
Early diagenetic sediment-hosted stratiform copper (eSSC) mineralization results from low-temperature cuprous chloride complexes carried by saline aqueous solution circulating through footwall aquifers. Favorable copper solubilities are attained in moderately oxidizing, near-neutral pH solutions. That specific oxidation level is not determined by co-existence with hematite, with its near-indiscriminant control over Eh. Instead, redbed footwall aquifers are signatures of diagenetic oxidation. Relentless in-situ oxidation of ferrous minerals in redbeds produces pore waters too reduced to transport copper, thus eliminating compaction waters as ore solutions. Continuous early influxes of descending oxygen-rich meteoric waters which have assimilated evaporitic salts may redden aquifers and still retain oxidation levels capable of carrying copper to form downstream eSSCs.
Mots clés
| Département: | Département des génies civil, géologique et des mines |
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| URL de PolyPublie: | https://publications.polymtl.ca/3586/ |
| Titre de la revue: | Minerals (vol. 7, no 10) |
| Maison d'édition: | MDPI |
| DOI: | 10.3390/min7100192 |
| URL officielle: | https://doi.org/10.3390/min7100192 |
| Date du dépôt: | 09 mars 2020 16:23 |
| Dernière modification: | 27 sept. 2024 22:50 |
| Citer en APA 7: | Brown, A. C. (2017). Constraints on conceptual and quantitative modeling of early diagenetic sediment-hosted stratiform copper mineralization. Minerals, 7(10). https://doi.org/10.3390/min7100192 |
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