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Late Neoproterozoic 40 degrees intraplate rotation within Australia allows for a tighter-fitting and longer-lasting Rodinia

Zheng-Xiang Li and David A. D. Evans
Late Neoproterozoic 40 degrees intraplate rotation within Australia allows for a tighter-fitting and longer-lasting Rodinia
Geology (Boulder) (January 2011) 39 (1): 39-42

Abstract

Previous paleomagnetic work has appeared to demand the breakup of southwest United States-East Antarctic (SWEAT) type Rodinia reconstructions before ca. 750 Ma, significantly earlier than the stratigraphic record of rift-drift transition between 715 Ma and 650 Ma. Here we reanalyze Australian paleomagnetic and regional tectonic data to produce a model in which the Precambrian Australian continent had a slightly different configuration before the breakup of Rodinia. A cross-continental megashear zone developed along the Paterson and Petermann orogens at ca. 650-550 Ma, during or after the breakup of Rodinia, manifested as an approximately 40 degrees clockwise rotation of the South and West Australian cratons relative to the North Australian craton around a vertical axis in Central Australia. This model reconciles major paleomagnetic discrepancies within Australia, and allows for a longer lifespan of SWEAT-like reconstructions of Rodinia that are consistent with the Neoproterozoic stratigraphic records of Australia and Laurentia.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 39
Serial Issue: 1
Title: Late Neoproterozoic 40 degrees intraplate rotation within Australia allows for a tighter-fitting and longer-lasting Rodinia
Affiliation: Curtin University, Department of Applied Geology, Perth, West. Aust., Australia
Pages: 39-42
Published: 201101
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 46
Accession Number: 2011-012666
Categories: Solid-earth geophysicsStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2011030
Illustration Description: sketch maps
S44°00'00" - S10°00'00", E113°00'00" - E154°00'00"
Secondary Affiliation: Yale University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201108
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