Bedrock Geology, Ring of Fire area, Ontario, Canada

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Information about Bedrock Geology, Ring of Fire area, Ontario, Canada

Published on February 23, 2014

Author: andyfyon


Precambrian Bedrock Mapping and Geological Data Compilation in the “Ring of Fire” Region: Precambrian Bedrock M apping and Geological Data C ompilation in the “Ring of Fire” Region Riku Metsaranta Ontario Geological Survey, ERGMS Outline: Outline What is the RoF Location, exploration, deposits, deposit types etc… Previous bedrock mapping This project Data compilation Fieldwork Highlights of results Project deliverables Relevance to other ministry activities PowerPoint Presentation: Modified from: PowerPoint Presentation: Ontario Ring of Fire Deposits and significant occurrences in the RoF: Deposit Principal Commodity Black Thor/Black Label Cr Big Daddy Cr Blackbird Cr Black Creek Cr Blackhorse Cr Eagles Nest Ni-Cu-PGE McFaulds #1 Cu-Zn McFaulds #3 Cu-Zn     Significant occurrences Principal Commodity Triple J Au 5.01 Cu-Zn Butler Cu-Zn, Fe-Ti-V Thunderbird Fe-Ti-V Highbank Lake Fe-Ti-V AT-12, Eagle 2 Ni-Cu-PGE Deposits and significant occurrences in the RoF Textural variations in chromite mineralizationBlack Thor deposit: (From Carson et al. 2013) Textural variations in chromite mineralizationBlack Thor deposit Massive Ni-Cu-PGE rich sulfide, Eagles Nest Deposit: Massive Ni-Cu-PGE rich sulfide, Eagles Nest Deposit Other mineralization: Other mineralization Cu-Zn-Ag mineralization in altered metavolcanic rocks Fe-Ti-V mineralization in gabbro PowerPoint Presentation: K nown Cr and Ni-Cu-PGE deposits, also Fe-Ti-V, and Au Fe-Ti-V Ni-Cu-PGE Cu-Zn-Ag , Fe-Ti-V, Ni-Cu-PGE Kimberlite -diamond Cu-Zn-Ag , Fe-Ti-V Cu-Zn-Ag, Fe-Ti-V Cu-Zn-Ag, Ni-Cu-PGE, Cr? Cr? Cu-Zn-Ag PowerPoint Presentation: Lack of modern geoscience data in the far north Distribution of geochronology samples in Ontario ca. 2005 RoF previous bedrock mapping: RoF previous b edrock mapping GSC Bostock (1957-62) GSC “Roads to Resources” program OGS Operation Winisk Lake (ca. 1971), Operation Fort Hope (ca. 1969) Recent mapping west of RoF OGS Buse et al. (2009) Compilation mapping Lowlands compilation maps Stott (2008a and b), Stott and Josey (2009) province scale geology compilation (MRD-126-REV1 ) PowerPoint Presentation: Bostock , 1962 PowerPoint Presentation: M2287, Thurston et al. 1973 PowerPoint Presentation: (MRD-126-REV1) OGS and GSC activities in the RoF: OGS and GSC activities in the RoF OGS Ring of Fire/ McFaulds Lake area regional bedrock mapping and data compilation project Data compilation Outcrop and drill core mapping GSC TGI4 Activities Regional characterization of UM-M intrusions in the McFaulds Lake Area A.-A. Sappin (PDF), M. Houlé , V. McNicoll (GSC), R. Metsaranta (OGS) Petrogenesis of the Cr- and Ni-Cu-PGE bearing intrusion (Black Thor- Black Label) H. Carson (PhD candidate), N. Farhangi, C. Spath , K. Mehrmanesh (MSc candidates), C.M. Lesher (Laurentian U), M. Houlé and V. McNicoll (GSC), R. Metsaranta (OGS) Petrogenesis of Fe-Ti-V mafic intrusions (Thunderbird and Butler) B. Kuzmich (MSc candidate), P. Hollings ( Lakehead U), M. Houlé and V. McNicoll (GSC), R. Metsaranta (OGS) Detrital chromite geochemistry M. Burnham, D. Crabtree ( GeoLabs ), M. Houlé (GSC), R. Metsaranta (OGS) Airborne magnetic and gravity surveys and modelling M. Pilkington, P. Keating (GSC), D. Rainsford (OGS) Chromite geochemistry in the RoF J. Laarman (PhD candidate), N. Duke (UWO) Bedrock mapping challenges in the RoF : Bedrock mapping challenges in the RoF PowerPoint Presentation: Compiled outcrop locations (note not a wide distribution ) PowerPoint Presentation: Compiled outcrop locations and diamond drill holes (better) Compiled diamond drilling data: Compiled diamond drilling data Collar information (location, azimuth, dip, downhole orientation surveys) Rock types (“from-to” data) Drill logs: assessment files, pdf logs Overburden thickness Paleozoic cover thickness PowerPoint Presentation: Field work 2010-2013 PowerPoint Presentation: Distribution of relogged holes (green) and mapped outcrops (red) Fieldwork: Fieldwork Relogged 260 drill holes Mapped 262 outcrops ~2085 samples Outcrop Mapping and drill core relogging: Outcrop Mapping and drill core relogging Rock types Structures Alteration Mineralization Photos Sampling Magnetic susceptibility Analytical data: Analytical data Whole rock geochemistry (major elements xrf ), trace elements (ICPMS, ICPAES, xrf , specific gravity) ~1000 analyses characterising major map units U- Pb zircon geochronology (~25 new ages from the RoF ) Stratigraphy of the McFaulds Lake Greenstone belt Ages of mafic and felsic intrusions Improved understanding of RoF geology-highlights: Improved understanding of RoF geology-highlights Significant decrease in the proportion of mafic-ultramafic intrusive rocks compared to old mapping Modified extent of greenstone belt, particularly in the northern part of the map area Improved understanding of the internal stratigraphy of the greenstone belt Ultramafic intrusive rocks with good potential to host Cr-Ni-Cu-PGE deposits are known to occur at only a few locations in the RoF Widespread occurrences of Fe-Ti-V mineralized mafic intrusions PowerPoint Presentation: internally the McFaulds Lake greenstone belt can be subdivided into “Assemblages” spanning from ca. 2830Ma to 2700Ma, these appear to have different potential with respect to Cu-Zn-Ag mineralization We know there are at least two episodes of mafic-ultramafic intrusive rocks in the RoF ca. 2810Ma in the south, and ca. 2735Ma mineralized rocks in the central RoF Project deliverables: Project deliverables 1:100 000 or 1:125 000 scale regional maps covering the entire RoF (likely two map sheets) 1:20 000 scale map covering the major deposits in the central region MRD field data (drill logs, outcrop mapping) whole rock geochemistry, geochronology, physical properties data, drilling compilation Open file report describing RoF geology, geochemical data, geochronology data and interpretations Potential relevance to MNR-MOE activities: Potential relevance to MNR-MOE activities Detailed characterisation of bedrock substrate including geochemical characterisation of all map units bedrock controls on surface water chemistry i dentification of areas of significant outcrop potential aggregate sources Drill hole compilation Overburden thickness maps, Paleozoic cover thickness Distribution of mineral deposits and occurrences, improved MDI database and identifications of areas of high mineral potential focus of monitoring activities ahead of potential discoveries? Land use planning Detailed record of where significant exploration activities have already taken place e.g. diamond drilling Potential complications for baseline data e.g. predisturbed areas? Acknowledgements: Acknowledgements Thanks are extended to all mining companies involved in the McFaulds Lake area. In particular we would like to thank: Andrew Mitchell, Richard Fink, David Shinkle , Ryan Weston, Daron Slaney ( Cliffs Natural Resources ), Don Hoy, Martin Tuscherer ( formerly with Freewest Resources/Cliffs Natural Resources ), Ralph MacNally , Eric Mosley, Matt Downey ( Noront Resources ), Mike Flanagan and Peter Smith ( Fancamp Exploration ), Moe Lavigne ( KWG Resources ), Quentin Yarie, Jacob McKinnon, Craig Sherba , Craig Hunt, and James Masters ( MacDonald Mines ), David Palmer ( Probe Mines ), Jim Voisin ( UC Resources ), David Clarke ( Canterra Minerals ), Nathalie Hansen, Éric Hébert and Ian Lawyer ( Melkior Resources ), Christine Vaillancourt and Ian Bliss ( Northern Shield Resources ) for their generous assistance, numerous discussions, permission to access properties/diamond drill cores, and corporate geological databases. Jim Franklin, Larry Hulbert, Jim Mungall and Greg Stott are thanked for valuable discussions and insight into the geology of the McFaulds Lake area. Mike Lesher , Heather Carson, Pete Hollings, Ben Kuzmich , Anne-Aurélie Sappin, Jordan Laarman Desmond Rainsford, Mark Pilkington, Mike Hamilton, Sandra Kamo , Robert Lodge, Joe Petrus and Vicki McNicoll are thanked for preliminary geochronological analyses. Hearst Air Service, Leuenberger Air Service, Thunder Airlines, National Helicopters and the Ministry of Natural Resources are thanked for float plane and helicopter services Elijah Jacob, Jonas Whitehead, Travis Spence, Leah Wabasse and Chris McKay are thanked for helping out with various aspects of our work in Webequie Jean-François Beausoleil , Cedric Mayer, James Nopper (field assistance)

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