Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada.
This paper documents element mobility patterns from a magnetite-group Iron Oxide Copper–Gold (IOCG) prospect in the Northwest Territories of Canada and explores implications for space–time chemical evolution of metasomatic systems hosting IOCG deposits. The Fab system, located in the Great Bear magm...
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ftinrsquebec:oai:espace.inrs.ca:4354 2023-05-15T17:46:33+02:00 Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. Montreuil, Jean-François Potter, Eric G. Corriveau, Louise Davis, William J. 2016 https://espace.inrs.ca/id/eprint/4354/ https://doi.org/10.1016/j.oregeorev.2015.08.010 unknown Montreuil, Jean-François, Potter, Eric G., Corriveau, Louise et Davis, William J. (2016). Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. Ore Geology Reviews , vol. 72 , nº Part 1. p. 562-584. DOI:10.1016/j.oregeorev.2015.08.010 <https://doi.org/10.1016/j.oregeorev.2015.08.010>. doi:10.1016/j.oregeorev.2015.08.010 IOCG element mobility uranium Great Bear magmatic zone rare earth elements Fab Article Évalué par les pairs 2016 ftinrsquebec https://doi.org/10.1016/j.oregeorev.2015.08.010 2023-02-10T11:43:00Z This paper documents element mobility patterns from a magnetite-group Iron Oxide Copper–Gold (IOCG) prospect in the Northwest Territories of Canada and explores implications for space–time chemical evolution of metasomatic systems hosting IOCG deposits. The Fab system, located in the Great Bear magmatic zone (GBMZ) of the Northwest Territories, Canada, contains numerous Fe–Cu–U showings associated with high temperature (HT) potassic–iron alteration overprinting extensive zones of sodic to HT calcic–iron alteration. Each hydrothermal alteration assemblage is associated with distinct element mobility patterns that record evolving physico-chemical properties of the hydrothermal fluids. New geochronological data constrain the alteration and IOCG mineralization in the Fab system to a 3 m.y. window between 1870–1867 Ma, which is broadly contemporaneous with extensive high-level intrusive activity across the GBMZ. Regional- to local-scale element mobility patterns characteristic of the sodic and sodic–calcic–iron alteration type record leaching combined with weak to strong mass losses. Pure sodic alteration depleted the rocks in Ca, Co, Cu, Fe, Mg, Th, U and V. Conversely, sodic–calcic–iron alteration records significant depletions of Nb, REE, Ta, Ti, Th and U. These element mobility patterns differ from intense HT calcic–iron alteration that is enriched in Ca, Co, F, Fe, Mg, Mn, Ni and V with modest enrichments to locally significant mineralization in Th, U and REE. HT calcic–iron alteration is also characterized by substantial mass gains that translate into volume gains in stockwork zones and mass/volume gains in zones of intense host rock replacement. HT potassic–iron alteration is characterized by enrichments in Ba, K, Ni, U and V, along with locally Co and Cu. The temporal and spatial association of the Fab system alteration and the emplacement of the porphyritic dacite are indicative of the predominant involvement of magmatic–hydrothermal fluids. The high F- and Cl- contents of the porphyritic dacite and of the ... Article in Journal/Newspaper Northwest Territories Institut national de la recherche scientifique, Québec: Espace INRS Canada Northwest Territories Ore Geology Reviews 72 562 584 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
unknown |
topic |
IOCG element mobility uranium Great Bear magmatic zone rare earth elements Fab |
spellingShingle |
IOCG element mobility uranium Great Bear magmatic zone rare earth elements Fab Montreuil, Jean-François Potter, Eric G. Corriveau, Louise Davis, William J. Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. |
topic_facet |
IOCG element mobility uranium Great Bear magmatic zone rare earth elements Fab |
description |
This paper documents element mobility patterns from a magnetite-group Iron Oxide Copper–Gold (IOCG) prospect in the Northwest Territories of Canada and explores implications for space–time chemical evolution of metasomatic systems hosting IOCG deposits. The Fab system, located in the Great Bear magmatic zone (GBMZ) of the Northwest Territories, Canada, contains numerous Fe–Cu–U showings associated with high temperature (HT) potassic–iron alteration overprinting extensive zones of sodic to HT calcic–iron alteration. Each hydrothermal alteration assemblage is associated with distinct element mobility patterns that record evolving physico-chemical properties of the hydrothermal fluids. New geochronological data constrain the alteration and IOCG mineralization in the Fab system to a 3 m.y. window between 1870–1867 Ma, which is broadly contemporaneous with extensive high-level intrusive activity across the GBMZ. Regional- to local-scale element mobility patterns characteristic of the sodic and sodic–calcic–iron alteration type record leaching combined with weak to strong mass losses. Pure sodic alteration depleted the rocks in Ca, Co, Cu, Fe, Mg, Th, U and V. Conversely, sodic–calcic–iron alteration records significant depletions of Nb, REE, Ta, Ti, Th and U. These element mobility patterns differ from intense HT calcic–iron alteration that is enriched in Ca, Co, F, Fe, Mg, Mn, Ni and V with modest enrichments to locally significant mineralization in Th, U and REE. HT calcic–iron alteration is also characterized by substantial mass gains that translate into volume gains in stockwork zones and mass/volume gains in zones of intense host rock replacement. HT potassic–iron alteration is characterized by enrichments in Ba, K, Ni, U and V, along with locally Co and Cu. The temporal and spatial association of the Fab system alteration and the emplacement of the porphyritic dacite are indicative of the predominant involvement of magmatic–hydrothermal fluids. The high F- and Cl- contents of the porphyritic dacite and of the ... |
format |
Article in Journal/Newspaper |
author |
Montreuil, Jean-François Potter, Eric G. Corriveau, Louise Davis, William J. |
author_facet |
Montreuil, Jean-François Potter, Eric G. Corriveau, Louise Davis, William J. |
author_sort |
Montreuil, Jean-François |
title |
Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. |
title_short |
Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. |
title_full |
Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. |
title_fullStr |
Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. |
title_full_unstemmed |
Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. |
title_sort |
element mobility patterns in magnetite-group iocg systems: the fab iocg system, northwest territories, canada. |
publishDate |
2016 |
url |
https://espace.inrs.ca/id/eprint/4354/ https://doi.org/10.1016/j.oregeorev.2015.08.010 |
geographic |
Canada Northwest Territories |
geographic_facet |
Canada Northwest Territories |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_relation |
Montreuil, Jean-François, Potter, Eric G., Corriveau, Louise et Davis, William J. (2016). Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. Ore Geology Reviews , vol. 72 , nº Part 1. p. 562-584. DOI:10.1016/j.oregeorev.2015.08.010 <https://doi.org/10.1016/j.oregeorev.2015.08.010>. doi:10.1016/j.oregeorev.2015.08.010 |
op_doi |
https://doi.org/10.1016/j.oregeorev.2015.08.010 |
container_title |
Ore Geology Reviews |
container_volume |
72 |
container_start_page |
562 |
op_container_end_page |
584 |
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1766150275643473920 |