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Cretaceous oblique extensional deformation and magma accumulation in the Fosdick Mountains migmatite-cored gneiss dome, West Antarctica

McFadden, R.R; Siddoway, Christine Smith; Teyssier, C; Fanning, Christopher


The Fosdick Mountains, West Antarctica, expose a 15 x 80 km migmatite-cored gneiss dome consisting of migmatitic gneisses, diatexite migmatite, and subhorizontal leucogranite sheets. The Fosdick dome was emplaced and exhumed in the mid-Cretaceous due to oblique extension associated with the West Antarctic Rift system along the West Antarctic-New Zealand segment of East Gondwana. The dome is bounded to the south by a dextral oblique detachment structure and to the north by an inferred dextral...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Tectonics
DOI: 10.1029/2009TC002492


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