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TitleTectonic and metallogenic implications of regional seismic profiles in the Timmins Mining Camp
AuthorSnyder, D B; Bleeker, W; Reed, L E; Ayer, J A; Houlé, M G; Bateman, R
SourceA special issue devoted to base metal and gold deposits of the Abitibi Greenstone Belt; by Ayer, J A (ed.); Thurston, P C (ed.); Lafrance, B (ed.); Economic geology and the bulletin of the Society of Economic Geologists vol. 103, issue 6, 2008 p. 1135-1150,
Alt SeriesEarth Sciences Sector, Contribution Series 2005560
PublisherSociety of Economic Geologists
Mediapaper; on-line; digital
File formathtml; pdf (Adobe® Reader®)
NTS31M/13; 32D/04; 32D/05; 32D/12; 32D/13; 32E/04; 41P/13; 41P/14; 41P/15; 41P/16; 42A; 42H/01; 42H/02; 42H/03; 42H/04
AreaTimmins; Kirkland Lake; Cochrane; Matheson
Lat/Long WENS -81.7500 -79.5000 49.2500 47.7500
Subjectseconomic geology; geophysics; tectonics; structural geology; stratigraphy; Archean; geophysical surveys; seismic reflection surveys; seismic profiles; metallogeny; structural features; structural trends; folds; nappes; faults; faults, thrust; deformation; tectonic history; tectonic setting; tectonic interpretations; mineralization; mineral deposits; gold; base metals; bedrock geology; lithology; sedimentary rocks; igneous rocks; volcanic rocks; intrusive rocks; intrusions; batholiths; plutons; diabase dykes; crustal studies; crustal structure; fluid flow; alteration; Timmins Mining Camp; Abitibi Greenstone Belt; Porcupine-Destor deformation zone; Kidd Creek mine; Hollinger mine; McIntyre mine; Dome mine; Larder Lake-Cadillac deformation zone; Shaw dome; Adams Pluton; Watabeag Batholith; Round Lake Batholith; Lake Abitibi Batholith; Kenogamissi Batholith; Timiskaming assemblage; Porcupine assemblage; Blake River assemblage; Tisdale assemblage; Kidd-Munro assemblage; Stoughton-Roquemaure assemblage; Deloro assemblage; Pacaud assemblage; Eldorado Tonalite; synvolcanic rocks; Precambrian
Illustrationssketch maps; cross-sections; seismic reflection profiles
ProgramTargeted Geoscience Initiative (TGI-3), 2005-2010
ProgramIndustry Canada, Federal Economic Development Initiative for Northern Ontario (FedNor)
ProgramNorthern Ontario Heritage Fund
ProgramTimmins Economic Development Corporation
AbstractFour regional seismic reflection profiles totalling 153 line km were acquired near Timmins, Ontario, within the southern Abitibi greenstone belt. Five additional high-resolution lines targeted specific metallogenically important features such as the Porcupine-Destor deformation zone. Interpretation of these profiles individually and in a composite north-south transect reveals a number of prominent bands of reflectors within the upper 15 km of the crust that define a series of folds or antiformal stacks of thrust nappes. Structures and stratigraphy mapped at the surface confirm structural culminations in these locations. At depths greater than 10 km the reflectors have generally shallower dips implying broad folding. Major ore deposits such as those at the Kidd Creek, Hollinger, McIntyre, and Dome mines are located on the northern, steeply dipping limbs of these antiformal stacks, implying that the fold structures focused post tectonic mineralizing fluids within the upper crust into the near surface. The Porcupine-Destor deformation zone is proximal to the large gold deposits near Timmins and is revealed by the new seismic data to be a composite of early fold structures and late transpressive fault arrays.