Research Article| July 01, 2012 Two detrital zircon signatures for the Cambrian passive margin of northern Laurentia highlighted by new U-Pb results from Canada T. Hadlari; Hadlari † 1Geological Survey Canada, 3303 33rd Street NW, Calgary, Alberta T2L 2A7, †E-mails: thomas.hadlari@nrcan.gc.ca; bill.davis@nrcan.gc.ca; keith.dewing@nrcan.gc.ca; larry.heaman@ualberta.ca; yvon_lemieux@gov.nt.ca; luke_ootes@gov.nt.ca; brian.pratt@usask.ca; lpyle@vigeoscience.com Search other works this author on:...

Research Article| November 01, 2014 Trace Element Geochemistry of Magnetite and Its Relationship to Cu-Bi-Co-Au-Ag-U-W Mineralization in the Great Bear Magmatic Zone, NWT, Canada* P. Acosta-Góngora; Acosta-Góngora † 1Department Earth Atmospheric Sciences, University Alberta, Edmonton, Alberta T6G2E3, Canada †Corresponding author: e-mail, pedro1@ualberta.ca Search for other works by this author on: GSW Google Scholar S. A. Gleeson; Gleeson I. M. Samson; Samson 2Department Environmental...

Research Article| March 01, 2015 Gold Refining by Bismuth Melts in the Iron Oxide-Dominated NICO Au-Co-Bi (±Cu±W) Deposit, NWT, Canada P. Acosta-Góngora; Acosta-Góngora † 1Department of Earth and Atmospheric Sciences, University Alberta, Edmonton, T6G 2E3 †Corresponding author: e-mail, Pedro.AcostaGongora@NRCan-RNCan.gc.ca Search for other works this author on: GSW Google Scholar S. A. Gleeson; Gleeson I. M. Samson; Samson 2Department Environmental Windsor, Ontario, N9B 3P4 L. Ootes; Ootes...

The Paleoproterozoic Hottah terrane is the westernmost exposed bedrock of Canadian Shield and a critical component for understanding evolution Wopmay Orogen. Thirteen new high-precision U–Pb zircon crystallization ages are presented support field observations volcano-plutonic continuum from through to end Great Bear magmatism, >1950 1850 Ma. ages, geochemical data, newly published detrital data used challenge hitherto accepted models as an exotic arc microcontinent that arrived over...

Research Article| July 01, 2007 Iron Oxide Copper-Gold-type Polymetallic Mineralization in the Contact Lake Belt, Great Bear Magmatic Zone, Northwest Territories, Canada A.H. Mumin; Mumin † 1Department of Geology, Brandon University, Brandon, Manitoba, R7A 6A9. †Corresponding Author: E-mail: mumin@brandonu.ca Search for other works by this author on: GSW Google Scholar L. Corriveau; Corriveau 2Natural Resources Canada, Geological Survey Québec, G1K 9A9. A.K. Somarin; Somarin Ootes 3Northwest...

New field and U–Pb zircon data from the south-central Wopmay Orogen (south of 65°N) establish crystallization ages basement plutonic phases bring to forefront questions on architecture orogen. The complex extensive >3300–2575 Ma domain was derived adjacent Slave craton. Paleoproterozoic supracrustal rocks, dominated by an pelitic–psammitic sequence with basal arenite, conglomerate, carbonate, unconformably overlie this basement. Pre- post-kinematic plutons intrude both overlying strata...

In order to thoroughly evaluate the genesis of orogenic gold mineralization in context plate tectonics, absolute age data are required link with lithological evolution. We show that pyrite, associated from Con deposit ca. 2700 Ma Yellowknife greenstone belt, has an Re-Os isochron 2591 ± 37 Ma. This is identical previously proposed timing 2592 for S-type pluton-related lode-gold within 2660 graywacke-mudstone turbidites east belt. The pyrite indicate was deposited 60 100 m.y. after formation...

The supracrustal assemblages of many Archean cratons contain significant volumes graywacke-mudstone turbidites, and, notably, the stratigraphy Slave craton is dominated by these rocks (∼70%). Phanerozoic sedimentary successions are used extensively in deciphering evolution an orogen, but, contrast, turbidites have not added as significantly to our understanding tectonic cratons. This because geological complexities, such a lack fossils and marker units, leave regional correlations ambiguous...

Abstract Komatiitic magmatism is a characteristic feature of Archean cratons, diagnostic the addition juvenile crust, and clue to thermal evolution early Earth lithosphere. The Slave craton in northwest Canada contains >20 greenstone belts but no identified komatiite. reason for this dearth komatiite, when compared other remains enigmatic. Central Cover Group (ca. 2.85 Ga) includes fuchsitic quartzite with relict detrital chromite grains heavy-mineral laminations. Major platinum group...

Abstract The crustally derived Tungsten Plutonic Suite (TPS) in the northern Canadian Cordillera is responsible for several of world’s most important tungsten (W) resources, but actual source rocks to these exceptionally metallogenic magmas have never been identified. Detrital zircon studies improved our knowledge exposed supracrustal packages region, such that a U-Pb study inherited cores TPS provides an opportunity determine age and provenance melt magmas. dominated by Neoarchean...

Abstract The ca . 1.9 Ga Beaverlodge Lake paleosol was studied using redox‐sensitive Cr isotopes in order to determine the isotopic response paleoweathering of a rhyodacite parent rock 500 million years after Great Oxidation Event. Redox reactions occurring modern weathering environments produce Cr(VI) that is enriched heavy compared igneous inventory. species are soluble and easily leached from soils into streams rivers, thus, leaving particle‐reactive isotopically light Cr(III) build up...

The Mackenzie and eastern Selwyn Mountains, Northwest Territories, Canada, are the northeast expression of Cordilleran orogen have a geologic history that spans last one billion years. region has undergone diverse tectonic evolution, which is reflected in an equally collection mineral deposits prospects. More than 300 these prospects been documented this area Territories here they categorized into deposit types their mode formation evaluated highlighted. Stratiform/stratabound Cu-Ag...

Emerald in the Mackenzie Mountains is hosted extensional quartz–carbonate veins cutting organic-poor Neoproterozoic sandstones and siltstones within hanging wall of a thrust fault that emplaced these strata above Paleozoic rocks. Isotopic compositions water extracted from emerald are typical evolved sedimentary sulphate brines. Fluid inclusion studies indicate two saline fluid populations: CO 2 –N -bearing, high-salinity brine (20.4–25.8 wt.% NaCl equivalent), gas-free, (7.6–15.3...

Two temporally distinct Neoarchean turbidite packages are known to occur in the Slave craton. The older is a greywacke–mudstone succession that includes renowned Burwash Formation (ca. 2661 Ma). In this study, previously undated tuff bed demonstrated have crystallized at ca. 2650.5 ± 1.0 Ma refining deposition age of these turbidites between and 2650 Ma. younger locally distinctive as they contain interstratified banded iron formation (BIF). Previous work were deposited 2640 2615 Ma, based...

The Wopmay orogen is a Paleoproterozoic accretionary belt preserved to the west of Archean Slave craton, northwest Canada. Reworked crystalline basement occurs in orogen, and new bedrock mapping, U–Pb geochronology, Sm–Nd isotopic data further substantiate craton parentage for this basement. Detrital zircon results from unconformably overlying supracrustal rocks also support provenance. Rifting margin began at ca. 2.02 Ga with second rift phase constrained between 1.92 1.89 Ga, resulting...