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TitleControls on the localization and timing of mineralized intrusions in intra-continental rift systems, with a specific focus on the ca. 1.1 Ga Mid-Continent Rift system
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AuthorBleeker, W; Liikane, D A; Smith, J; Hamilton, M; Kamo, S L; Cundari, R; Easton, M; Hollings, P
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 2; by Rogers, N (ed.); Geological Survey of Canada, Open File 8373, 2018 p. 15-27, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 2, Geological Survey of Canada, Open File 8373
File formatpdf
NTS41J; 41K; 41L; 41M; 41N; 41O; 41P; 42A; 42B; 42C; 42D; 42E; 42F; 42G; 42H; 42L; 52A; 52B; 52G; 52H; 52I
AreaLake Superior; Lake Nipigon; Michigan; Wisconsin; Minnesota; Canada; United States of America
Lat/Long WENS -94.0000 -80.0000 51.0000 45.0000
Subjectseconomic geology; tectonics; geochronology; tectonic setting; tectonic evolution; rifts; intrusions; sills; dykes; magmatism; mineral deposits; mineral exploration; mineral potential; nickel; copper; cobalt; sulphide deposits; ore mineral genesis; mineralization; ore controls; bedrock geology; lithology; igneous rocks; intrusive rocks; mafic intrusive rocks; carbonatites; ultramafic rocks; kimberlites; volcanic rocks; basalts; sedimentary rocks; structural features; faults; unconformities; radiometric dating; uranium lead dating; Mid-Continent Rift; Bayfield Group; Jacobsville Sandstone; Oronto Group; Freda Sandstone; Nonesuch Shale; Copper Harbour Conglomerate; Bessemer Quartzite; Sibley Group; ore systems approach; platinum group elements (PGE); dyke swarms; Precambrian; Proterozoic
Illustrationsgeoscientific sketch maps; tables; photographs
ProgramTargeted Geoscience Initiative (TGI-5), Knowledge Management Coordination
ProgramTargeted Geoscience Initiative (TGI-5), Nickel-copper-PGE-chromium systems
Released2018 03 01
AbstractA brief report is presented on the early stages of our study of the ca. 1.1 Ga Mid-continent Rift system, which hosts a diverse range of intrusions, many of which are mineralized and are being actively explored. Key questions to be ad-dressed by this study are the localization of the mineralized intrusions, and whether we can resolve, through addition-al and more precise U-Pb geochronology, clear temporal, spatial, and tectonic patterns that link the various intrusions to the overall evolution of the rift system, and to specific stages of the flood basalt sequence. An initial compilation is presented of all known intrusions and their associated questions.