Vsevolod A. Maslov1, Dmitry M. Vorobiev2, and Boris V. Belyatsky1. (1) Department to geologies and mineral resource of the Antarctic, Institute for Geology and Mineral Resources of the World Ocean (VNIIIOkeangeologia), Angliisky Avenue 1, St.-Petersburg, Russia, (2) Polar Marine Geological Expedition, St.-Petersburg, Russia
Shaw massif is situated in the central part of the Prince Charles Mountains and represents a complex with complicated fold structure and composition which include biotite leucogneisses, garnet-biotite gneisses and plagiogneises (Lambert gneisses); amphibole-biotite melanogneisses, garnet-biotite plagiogneisses (Shaw melanogneisses). Also, there are poorly developed garnet-sillimanite-biotite gneisses (Isabelle paragneisses) which are met in the form of xenolith bodies among the Lambert gneisses and could be the fragments of the ancient sedimentary layer. The obtained U-Pb data reflect the two main geological events with the ages 900-1100 Ma and 450-550 Ma corresponding to Rayner and Pan-African tectonothermal events. The Shaw Massif terrane has been affected by at least 5 deformation events and three stages of metamorphic reworking.
The structural geological position of the Shaw Massif region could be interpreted as a younger, high grade metamorphic region framing the Fisher Province.
[Manuscript]