Since the 1960s, the structure and age of the Antarctic crust has been the object of systematic study 1,2, and others. East Antarctica is an ancient platform, while the West Antarctica and Transantarctic Mountains are composed of different-age Phanerozoic fold systems. It was suggested that the basement of the Antarctic Platform was formed in the Early Precambrian (mainly in the Archean) and then subjected to intense and repeated tectonothermal activation without significant mantle input . The geodynamic nature and role of the Mesoproterozoic (Grenvillian) and Neoproterozoic-Early Paleozoic (Panafrican) stages of tectonogenesis in the crustal growth of East Antarctica remain controversial problems. Russian geologists attributed processes of activation to the Mesoproterozoic stage , whereas some foreign authors suggested that Queen Maud Land (Fig. 1) is a continuation of the Grenvillian orogenic belt of North America . Panafrican tectonogenesis was interpreted either as an accretionary orogenic process or an activation process . The role of juvenile material in the Grenville and Panafrican structures was not studied specially and remains one of the key problems in the geological structure of East Antarctica. This paper is the first attempt to reconstruct the evolution of the Antarctic crust by generalization of Sm-Nd isotope data on ancient crystalline rocks and diverse granitoids of Antarctica and to distinguish the TDM model age provinces.
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