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Open AccessArticle

Influence of Titaniferous Phases on Tungsten Mineralizing Processes at the Giant Sisson Brook W-Mo Deposit, New Brunswick, Canada: Mineral-Chemical and Geochronological Assessment

1
Department of Earth Sciences, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
2
Collaborative Innovation Center for Exploration of Strategic Mineral Resources, School of Earth Resources, China University of Geosciences, Wuhan 430074, China
*
Authors to whom correspondence should be addressed.
Minerals 2020, 10(7), 637; https://doi.org/10.3390/min10070637
Received: 27 June 2020 / Revised: 14 July 2020 / Accepted: 15 July 2020 / Published: 18 July 2020
(This article belongs to the Special Issue Magmatic–Hydrothermal Alteration and Mineralizing Processes)
The Sisson Brook deposit is a low-grade, large-tonnage W-Mo deposit with notable Cu located in west-central New Brunswick, Canada, and is one of several W-Mo deposits in New Brunswick associated with fluids sourced from granitic plutons emplaced during the Devonian Acadian Orogeny. The younger Devonian-aged stockwork and replacement scheelite-wolframite-molybdenite (and chalcopyrite) mineralization straddles the faulted boundary between Cambro-Ordovician metasedimentary rocks with Ordovician felsic volcaniclastic rocks and the Middle Silurian Howard Peak Granodiorite, with dioritic and gabbroic phases. U-Pb dating of magmatic titanite in the host dioritic phase of the Howard Peak Granodiorite using LA ICP-MS resulted in a 204Pb-corrected concordant age of 432.1 ± 1.9 Ma. Petrologic examination of selected mineralization combined with elemental mapping of vein selvages using micro-XRF and metasomatic titanite and ilmenite grains using LA ICP-MS indicates that saturation of titaniferous phases influenced the distribution of scheelite versus wolframite mineralization by altering the aFe/aCa ratio in mineralizing fluids. Ilmenite saturation in Ti-rich host rocks lowered the relative aFe/aCa and led to the formation of scheelite over wolframite. Altered magmatic titanite and hydrothermal titanite also show increased W and Mo concentrations due to interaction with and/or saturation from mineralizing fluids. View Full-Text
Keywords: W-Mo deposit; Sisson Brook; New Brunswick; scheelite; wolframite; titanite; ilmenite W-Mo deposit; Sisson Brook; New Brunswick; scheelite; wolframite; titanite; ilmenite
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MDPI and ACS Style

Bustard, A.L.; Zhang, W.; Lentz, D.R.; McFarlane, C.R.M. Influence of Titaniferous Phases on Tungsten Mineralizing Processes at the Giant Sisson Brook W-Mo Deposit, New Brunswick, Canada: Mineral-Chemical and Geochronological Assessment. Minerals 2020, 10, 637. https://doi.org/10.3390/min10070637

AMA Style

Bustard AL, Zhang W, Lentz DR, McFarlane CRM. Influence of Titaniferous Phases on Tungsten Mineralizing Processes at the Giant Sisson Brook W-Mo Deposit, New Brunswick, Canada: Mineral-Chemical and Geochronological Assessment. Minerals. 2020; 10(7):637. https://doi.org/10.3390/min10070637

Chicago/Turabian Style

Bustard, Aaron L.; Zhang, Wei; Lentz, David R.; McFarlane, Christopher R.M. 2020. "Influence of Titaniferous Phases on Tungsten Mineralizing Processes at the Giant Sisson Brook W-Mo Deposit, New Brunswick, Canada: Mineral-Chemical and Geochronological Assessment" Minerals 10, no. 7: 637. https://doi.org/10.3390/min10070637

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