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Mixing of brine with oil triggered sphalerite deposition at Pine Point, Northwest Territories, Canada

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dc.contributor.authorSzmihelsky, Marko
dc.contributor.authorSteele-MacInnis, Matthew
dc.contributor.authorBain, Wyatt M.
dc.contributor.authorFalck, Hendrik
dc.contributor.authorAdair, Robin
dc.contributor.authorCampbell, Brandon
dc.contributor.authorDufrane, S. Andrew
dc.contributor.authorWent, Ashley
dc.contributor.authorCorlett, Hilary
dc.date.accessioned2022-09-07
dc.date.accessioned2022-10-12T21:20:33Z
dc.date.available2022-10-12T21:20:33Z
dc.date.issued2021
dc.description.abstractHydrocarbons are commonly invoked as triggers for the precipitation of sphalerite in carbonate-hosted Pb-Zn deposits, but direct evidence for the presence of petroleum during sulfide mineralization is rarely documented. Here, we report evidence of fluid mixing between basinal brines and oil during deposition of coarse sphalerite at a classic carbonate-hosted Pb-Zn district, Pine Point, Northwest Territories, Canada. The brines contain high concentrations of Pb, detectable aqueous sulfate, and hydrocarbons that attest to chemical interaction with oil. The oil inclusions in sphalerite contain much less Pb relative to the brines and no evident H2S, suggesting that the principal role of hydrocarbons was as a reductant. Mixing of brine with oil enabled the conversion of aqueous sulfate to sulfide, and thereby triggered sphalerite deposition.
dc.description.urihttps://library.macewan.ca/cgi-bin/SFX/url.pl/DKC
dc.identifier.citationSzmihelsky, M., Steele-MacInnis, M., Bain, W.M., Falck, H., Adair, R., Campbell, B., Dufrane, S.A., Went, A. and Corlett, H.J., 2021. Mixing of brine with oil triggered sphalerite deposition at Pine Point, Northwest Territories, Canada. Geology, 49(5), pp.488-492. https://doi.org/10.1130/G48259.1
dc.identifier.doihttps://doi.org/10.1130/G48259.1
dc.identifier.urihttps://hdl.handle.net/20.500.14078/2792
dc.languageEnglish
dc.language.isoen
dc.rightsAll Rights Reserved
dc.subjectoil
dc.subjectbrine
dc.subjectsphalerite deposition
dc.subjectNorthwest Territories
dc.subjectCanada
dc.titleMixing of brine with oil triggered sphalerite deposition at Pine Point, Northwest Territories, Canadaen
dc.typeArticle

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Department of Physical Sciences