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Constraints on conceptual and quantitative modeling of early diagenetic sediment-hosted stratiform copper mineralization

Alexander-C. Brown

Article (2017)

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Cite this document: Brown, A.-C. (2017). Constraints on conceptual and quantitative modeling of early diagenetic sediment-hosted stratiform copper mineralization. Minerals, 7(10). doi:10.3390/min7100192
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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.

Uncontrolled Keywords

early diagenetic sediment-hosted stratiform copper (eSSC); genetic modeling; compaction-driven; topography-driven; meteoric water; oxidation (Eh)-pH controls

Open Access document in PolyPublie
Subjects: 1400 Génie minier et minéral > 1400 Génie minier et minéral
2950 Mathématiques appliquées > 2960 Modélisation mathématique
Department: Département des génies civil, géologique et des mines
Research Center: Non applicable
Date Deposited: 09 Mar 2020 16:23
Last Modified: 10 Mar 2020 01:20
PolyPublie URL: https://publications.polymtl.ca/3586/
Document issued by the official publisher
Journal Title: Minerals (vol. 7, no. 10)
Publisher: MDPI
Official URL: https://doi.org/10.3390/min7100192

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