...GERALD M FRIEDMAN Abstract The Caribou Lake intrusive body, located in the Canadian shield, covers an area of 7 square miles. Its east-west dimension is 5½ miles; it attains a width of 2 miles but in the east tapers to a narrow constriction, 650 feet wide. Mapping of the foliation pattern...

...Fig. 1. (A) Map of western Superior Province showing the subprovinces and location of Red Lake. ERB: English River Basin, HBT: Hudson Bay Terrane, ILD: Island Lake Domain, KZ: Kapuskasing Zone, MRVT: Minnesota River Valley Terrane, MT: Marmion Terrane, NCC: North Caribou Core, NCT: North Caribou...

... Cross Lake greenstone belt of the Sachigo Subprovince, in the northwestern part of the Archean Superior Province of the Canadian Shield. The greenstone belt is situated in the northern margin of the Oxford–Stull domain of the North Caribou terrane, in tectonic contact with the Hudson Bay terrane...

...François Bussy; Thomas E. Krogh; Richard J. Wardle Abstract In the Cape Caribou River allochthon (CCRA), metaigneous and gneissic units occur as a shallowly plunging synform in the hanging wall of the Grand Lake thrust system (GLTS), a Grenvillian structure that forms the boundary between the Mealy...

...-BY license. The Uchi terrane of the Superior craton (Canada) comprises Meso-Neoarchean metavolcanic, metasedimentary, and plutonic rocks. It hosts multiple orogenic gold deposits extending along the southern margin of the North Caribou terrane ( Sanborn-Barrie et al., 2001 ). The Red Lake greenstone...

..., in combination with Nd isotopic data, indicates that the Oxford–Stull domain, and the Munro Lake, Island Lake, and North Caribou terranes may have been part of a much larger reworked Mesoarchean crustal block, the North Caribou superterrane. It appears that the Superior Province was assembled by accretion...

... of the greenstone belts of the North Caribou terrane and intrusive units surrounding the North Caribou greenstone belt. Box outlined by solid line represents location of (C). BRI, Berens River Intrusive complex; NCB, North Caribou Lake batholith; SB, Southern batholith; SLGC, Schade Lake gneissic complex; WB...

... assemblage observed in the Lake Winnipeg area. Thus, the North Caribou terrane appears to preserve vestiges of a Mesoarchean rifted succession together with overlying Neoarchean allochthonous, juvenile, volcanic successions over a considerable distance along its present-day southern margin. 1...

...-2.8-Ga plutonic and greenstone sequences. Plate-tectonic models maintain that the North Caribou terrane is an early continental mass against which other terranes (subprovinces) were rapidly accreted from 2.75 to 2.70 Ga. During accretion, a magmatic arc characterized by voluminous felsic intrusions...

... to 2729 Ma Confederation assemblage. Subsequent deformation and development of a regionally penetrative planar fabric (S 2 ) postdates ∼2729 Ma volcanism, pre-dates the intrusion of the ca. <2716 Ma Hooker-Burkoski stock and is host to gold mineralization. The Pickle Lake greenstone belt comprises...

...; FHMGB, Fort Hope – Miminiska; WLGB, Wallace Lake; GLGB, Garner Lake (Uchi domain); RiLGB, Rice Lake; BLGB, Bee Lake; NCGB, north Caribou; MLGB, Melchett Lake; SeLGB, Separation Lake; SSGB, Savant–Sturgeon; SGB, Shebandowan; WiLGB, Winston Lake; SrGB, Schreiber. Complexes: ALC, Assean Lake; ELMC...

...J.A. Percivala; V. McNicoll; A.H. Bailes Abstract The North Caribou terrane of the western Superior Province attained continental thickness (∼35 km) by 2997 Ma. It records a subsequent 300 million years history of continental fragmentation, arc magmatism, and terrane accretion. At Lake Winnipeg...

... parautochthon were assembled at some time after 2713 Ma, with peak metamorphism occurring prior to intrusion of the Blackstone pluton at 2702 ± 1 Ma. The core of the Sachigo subprovince, centered around North Caribou Lake, contains an area of Geon 28 metamorphic rocks that were apparently sheltered from...

... of the Mary River Group, and various younger granitoid intrusions. In the greenstone belts, intermediate–felsic volcanism (2.74–2.725 Ga) was accompanied and outlasted by calc-alkaline plutonism (2.73–2.715 Ga). Deformation, low- to medium-pressure metamorphism, and peraluminous plutonism followed at ca. 2.7...

... region. Silberman and Grantz (1984) inferred a depleted magma source for these rocks on the basis of strontium isotope data. More regionally, the Caribou Creek volcanic field lies within a N-NW–trending zone of Tertiary volcanic and shallow intrusive rocks in southern Alaska, which includes near-trench...

... and Sunaghun formations (new names), which yield detrital zircon U-Pb age populations of ca. 1050-1250, 1350-1450, 1600-1650, and 2500-2800 Ma (n =800). This succession is overlain by chert-bearing dolostone and limestone of the Caribou Bar formation (new name) that contains vase-shaped microfossils and yields...