Major Rock Units And Deformation Events

1613 Words Aug 14th, 2015 7 Pages
Figure 1: (A) North America with the location of Figure B outlined by the black box. (B) Simplified map of the tectonostratigraphic terranes comprising the Superior Province with locations of mineral deposits. (C) Tectonostratigraphic terranes of Minnesota. The location of Figure 3a is denoted by the black box. Terrane boundaries are denoted by thick black lines and iron formation is shown by thin red lines.
Table 1: Major lithologic units of the Wabigoon subprovince in Canada that are on strike with the rocks in the study area. Modified from Davis et al. (1989), Fralick and Davis (1999), and Czek and Poulsen (2010).
Figure 2: Lithostratigraphc correlation of major rock units and deformation events in the Neoarchean terranes of Minnesota. Modified from Jirsa et al. (2011).
Figure 3: (A) Regional geologic map of the Wabigoon and Quetico subprovinces in northwestern MN. This interpretation is based on aeromagnetic and drill data, with some lithologic interpretations modified from Jirsa et al. (2011). The Oaks Belt is outlined by the thin black box. It is interpreted to occur in the pressure shadow of a wedge of volcanoplutonic rocks that continue on strike into Canada. (B) Geologic map of the Oaks Belt (OB). The OB is bound to the north by the Quetico fault and to the south by the Vermillion fault. Regional faults in the area experienced a protracted history of thrusting and shearing that resulted in the overturning of the entire sequence of volcanic rocks. An inferred…
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