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Early Paleozoic Westward Directed Subduction at the Pacific Margin of Antartica by G. Kleinschmidt; F. Tessensohn is a book available to read on EtoBox.

What is Early Paleozoic Westward Directed Subduction at the Pacific Margin of Antartica about?

The tectonic history of the Antarctic continent during the Phanerozoic is best considered as part of the development of the circum-Pacific mobile belts. In early Paleozoic time, the continental margin at the Pacific side of Antarctica formed a 3000-km-long segment of the active Gondwana margin, which also includes Australia and parts of South Africa and South America. In the Antarctic segment, north Victoria Land forms one of the best exposed and investigated areas. This paper develops a plate tectonic reconstruction for this area based on several different lines of evidence; plate tectonic implications of paired metamorphic belts, granite types, submarine volcanism, a subduction complex, sedimentary basins, and thrust belts. It is concluded that a continuous westward directed subduction of oceanic crust under the East Antarctic craton has proceeded from the Early Cambrian to the Late Devonian. Three main episodes are documented by different criteria. Stage I is the early pre-Ross subduction phase; paired metamorphic belts formed the stage in the west and a volcanic island arc in the east; terminates with the accretion of the volcanic arc. Stage II occurs after the outward displace

Author

G. Kleinschmidt; F. Tessensohn

Publisher

American Geophysical Union

Published

2013

Language

EN