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Title39. Project Unit 10-005. An overview of the McFaulds Lake airborne gravity gradiometer and magnetic survey, Northwestern Ontario
AuthorRainsfod, D R B; Houlé, M G; Metsaranta, R T; Keating, P; Pilkington, M
SourceSummary of field work and other activities 2011; Ontario Geological Survey, Open File Report 6270, 2011 p. 39.1-39.8
Alt SeriesEarth Sciences Sector, Contribution Series 20110231
PublisherOntario Geological Survey
Documentopen file
RelatedThis publication is related to Metsaranta, R T; Houlé, M G; (2011). 12. Project Unit 10-004. McFaulds Lake area regional compilation and bedrock mapping project update; 12. Project Unit 10-004. McFaulds Lake area regional compilation and bedrock mapping project update, Summary of field work and other activities 2011, Ontario Geological Survey, Open File Report 6270
ProvinceOntario; Ontario
NTS43C/03; 43C/04; 43C/05; 43C/06; 43C/11; 43C/12; 43C/13; 43C/14; 43D/01; 43D/08; 43D/09; 43D/16; 43E/01; 43F/03; 43F/04
AreaMcFaulds Lake
Lat/Long WENS-86.3333 -85.1667 53.2500 52.0833
Subjectsgeophysics; gravity surveys; gravity interpretations; magnetic surveys; magnetic interpretations; gradiometer surveys; bedrock geology; lithology
ProgramMethodological Development, Targeted Geoscience Initiative (TGI-4)
AbstractGeophysical surveys are essential tools used by geologists and explorationists to constrain geological observations, identify prospective terrains and generate specific exploration targets. This is particularly true in areas with limited bedrock exposure. The McFaulds Lake region is a good example where geophysical surveys are essential to the overall geological understanding and exploration programs because of its particular physiography. The McFaulds Lake area is located at the boundary between the Superior Province, to the west, and the James Bay Lowland, to the east, and is characterized by a plain of low relief tilting slightly to the north-northeast that drains towards James Bay and Hudson Bay. The drainage is very poor and the scenery is dominated by wet muskeg or peat swamps and the vegetation is relatively treeless except in the vicinity of rare outcrops, moraine or esker ridges and along larger rivers.
To complement the McFaulds Lake Region mapping and compilation project (Metsaranta and Houlé, this volume), an airborne gravity gradiometer and magnetometer survey was flown over the central part of the "Ring of Fire" area. The survey was designed to help map the geology and structure in this poorly exposed region as well as to provide context for the diamond-drill hole and other geoscience data being compiled by the Ontario Geological Survey (OGS) and Geological Survey of Canada (GSC). This survey was carried out as a collaborative project between the OGS and the GSC. The project was jointly funded by the Targeted Geoscience Initiative 4 (TGI-4) and by the Ontario Ministry of Northern Development and Mines.
The purpose of this contribution is three-fold: 1) to bring attention to these new geophysical data in the McFaulds Lake area; 2) to provide an overview of the results; and 3) to provide some preliminary observations and interpretations.