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TitleProject Unit 10-004. Progress on the McFaulds Lake ("Ring of Fire") region data compilation and bedrock geology mapping project
AuthorMetsaranta, R T; Houlé, M G
SourceSummary of Field Work and Other Activities 2012; Ontario Geological Survey, Open File Report 6280, 2012 p. 43.1-43.12
Alt SeriesEarth Sciences Sector, Contribution Series 20120245
PublisherOntario Geological Survey
Documentopen file
File formatpdf
AreaMcFaulds Lake or "Ring of Fire"
Lat/Long WENS -87.0000 -86.0000 53.0000 52.7500
Subjectsstructural geology; stratigraphy; bedrock geology; metamorphic rocks; metamorphism; stratigraphic analyses; lithology; greenstone belts; McFaulds Lake Greenstone Belt; Kitchie Lake Supracrustal Package; Butler Lake Supracrustal Package; Muketei River Supracrustal Package; Winiskisis Channel Supracrustal Package; Attawapiskat River Supracrustal Package; supracrustal rocks; Precambrian
Illustrationslocation maps; photographs
ProgramMafic-Ultramafic Ore Systems, Targeted Geoscience Initiative (TGI-4)
This report provides an update on continued, regionally focussed, geological compilation and bedrock mapping in the McFaulds Lake or "Ring of Fire" region in northern Ontario. The project is part of the Ontario Geological Survey's (OGS) core bedrock geology mapping program, but it is also an in-kind contribution to the Targeted Geoscience Initiative 4 (TGI-4) of the Geological Survey of Canada (GSC), which is part of the Earth Sciences Sector (ESS) of Natural Resources Canada (NRCan). As outlined in Metsaranta (2010) and Metsaranta and Houlé (2011), the main objectives at the outset of the project were to
- update the regional bedrock geological mapping in the McFaulds Lake region;
- clarify and characterize the major lithologic units;
- better understand the stratigraphy and age relationships between the various lithologies;
- develop a better understanding of the actual extent of the mafic to ultramafic intrusions hosting recently discovered nickel-copper-platinum group elements (PGE) and chromium deposits in the region;
- develop a better understanding of the structural and metamorphic history of the area;
- improve our understanding of the relationship of geophysical features to bedrock geology.
More specifically, this report outlines some new observations and ideas on the broad stratigraphy of the McFaulds Lake greenstone belt, with a focus on supracrustal rocks based on field observations from outcrop mapping and diamond-drill holes carried out during the past summer. Further information on the project is also available to the reader in previously published articles (Metsaranta 2010; Metsaranta and Houlé 2011; Rainsford et al. 2011).