Activities of the JARE geology group for the Napier and Rayner Complexes, East Antarctica: an overview and perspective

Abstract

Scientific activities and results of the JARE (Japanese Antarctic Research Expedition) geology group for the Napier and Rayner Complexes in Enderby Land, East Antarctica, are reviewed in relation to 1) publications of two detailed geologic maps as a result of field work, 2) characterization of protoliths, and determinations of their formation ages, 3) precise analyses of metamorphic conditions, and age determinations of ultra-high temperature (UHT) metamorphism, and 4) classification of mafic dike swarms, and specification of their activities. On the basis of these activities and results, recommendations are made for research localities to make clear 1) the tectonics of the Napier and Rayner Complexes, 2) formation processes of Archaean continental crusts, 3) roles of UHT metamorphism of Archaean to Proterozoic ages, 4) dynamics of enriched-mantle type of source materials, and implications for related super-plume tectonics, and 5) growth histories of continental crusts, and processes of their amalgamation and separation.