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TitlePreliminary insights into the architecture of southern Cumberland Peninsula from magnetotelluric data
AuthorCraven, J A; Sanborn-Barrie, M; Roberts, B J; Stefanescu, M; Young, M
SourceGeological Survey of Canada, Current Research (Online) no. 2013-3, 2013, 15 pages,
PublisherNatural Resources Canada
Mediaon-line; digital
File formatpdf
NTS16E/13; 16L/03; 16L/04; 16L/05; 16L/06; 16L/12; 26H/07; 26H/08; 26H/09; 26H/10; 26H/14; 26H/15; 26H/16; 26I/01; 26I/02; 26I/08; 26I/09
AreaCumberland Peninsula; Baffin Island
Lat/Long WENS-65.5000 -63.0000 66.6667 65.6667
Subjectsgeophysics; structural geology; stratigraphy; magnetotelluric surveys; magnetotelluric data; magnetotelluric interpretations; bedrock geology; Archean; metamorphic rocks; gneisses; igneous rocks; plutonic rocks; intrusive rocks; structural features; structural analyses; structural interpretations; modelling; Qikiqtarjuaq plutonic suite; Precambrian; Proterozoic
Illustrationslocation maps; plots; photographs; sections
ProgramMultiple Metals - Cumberland Peninsula (Baffin Island, Nunavut), GEM: Geo-mapping for Energy and Minerals
Released2013 04 23
AbstractMagnetotelluric (MT) surveys are low-cost, ground-based geophysical imaging techniques with the capability to image electrical-resistivity structure at deposit or lithospheric scale. A magnetotelluric survey consisting of 26 sites undertaken during the summer of 2009 in tandem with ongoing bedrock mapping of Cumberland Peninsula has been analyzed to provide preliminary images of the subsurface geometries of its major geological boundaries and crustal-scale architecture. There is a good correlation between three electrically distinct layers and the three significant lithological components of the Peninsula: the Archean basement gneiss complex, and both the Paleoproterozoic cover sequence and the Qikiqtarjuaq plutonic suite. The structural fabrics mapped at the surface are reflected in both the shallow and deep MT sections. An apparent crustal-scale boundary exists beneath the southern part the survey area. Future 3-D modelling should unravel structural fabrics within the shallow portion of the crustal stack that can be used to constrain geological cross-sections.