Journal article

Early Cambrian crustal shortening and a clockwise P-T-t path from the southern Prince Charles Mountains, East Antarctica: implications for the formation of Gondwana

SD Boger, CJL Wilson

Journal of Metamorphic Geology | WILEY | Published : 2005

Abstract

Cambrian orogenesis (550-490 Ma) in the Lambert Province of the southern Prince Charles Mountains resulted in three successive stages of deformation. The earliest of these deformations resulted in the development of a layer-parallel foliation (S1) that was folded into macro-scale recumbent folds (F2). Subsequent deformation buckled the rocks into long-wavelength (c. 20 km), SW- to NW-trending antiformal closures (F3) mostly separated from each other by west to SW trending, steeply dipping, high-strain zones. Metapelitic rocks from the region are divisible into two compositional types: a high-Al, -Fe and -K type and a high-Mg, -Ca and -Na type. In rocks of both composition, relic staurolite p..

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