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Geology and Mineral Resources of West Africa
1 The geological settingl.- 1.1 The African continent.- 1.2 The major subdivisions of geological time.- 1.3 The structural framework of Africa.- 1.4 The global context.- 1.5 Age provinces and mineral
Late Archean Quetico accretionary complex, Superior province, Canada
The 1200-km-long Quetico subprovince consists of monotonous metagraywacke, with derived migmatite and granite, in thrust and/or transcurrent fault contact with the adjacent Wabigoon and Wawa
Evolution of an Archean subprovince boundary: a sedimentological and structural study of part of the Wabigoon–Quetico boundary in northern Ontario
A prograded clastic wedge, represented by formation- to group-scale units of metasedimentary strata in the Beardmore–Geraldton Terrane, developed in a transitional zone at the southern margin of a ...
The Rokelide Orogen
The term “Rokelide” (Allen et al. 1967) was proposed for the orogenic belt in Sierra Leone that was deformed during the Pan-African tectonothermal event, about 550 Ma (Kennedy 1964). Upper Archean
Granulite-facies metamorphism in the Quetico Subprovince, north of Manitouwadge, Ontario
A zone of granulites, defined by an orthopyroxene-in isograd and extending more than 100 km in length and about 10 km in width, occurs near the southern margin of the Quetico Subprovince, north of
Trench and slope basin deposits in an Archean metasedimentary belt, Superior Province, Canadian Shield
The identification of a late Archean arc–trench assemblage in northwestern Ontario provides the opportunity to compare depositional systems developed in a Precambrian convergent setting with Cenozoic
Late Precambrian and Phanerozoic geology of Sierra Leone
The post-Archaean geology of Sierra Leone is reviewed and interpreted. Late Precambrian development of fault-controlled sedimentation of glacigenic, fluviatile, and marine deposits with minor
Field relations and chemistry of sapphirine-bearing rocks from the Bjoresund area, Fiskenaesset, western Greenland
Two contrasting sapphirine-bearing assemblages are described: a higbly maguesian one, developed sporadically at the upper contact of the FisketrEsset Complex in association with layered ultramafic