The tectonic significance of lower Permian successions in the Texas Orocline (Eastern Australia)

Campbell, M., Rosenbaum, G., Shaanan, U., Fielding, C. R. and Allen, C. (2015) The tectonic significance of lower Permian successions in the Texas Orocline (Eastern Australia). Australian Journal of Earth Sciences, 62 7: 789-806. doi:10.1080/08120099.2015.1111259


Author Campbell, M.
Rosenbaum, G.
Shaanan, U.
Fielding, C. R.
Allen, C.
Title The tectonic significance of lower Permian successions in the Texas Orocline (Eastern Australia)
Journal name Australian Journal of Earth Sciences   Check publisher's open access policy
ISSN 0812-0099
1440-0952
Publication date 2015-11-25
Year available 2015
Sub-type Article (original research)
DOI 10.1080/08120099.2015.1111259
Open Access Status Not Open Access
Volume 62
Issue 7
Start page 789
End page 806
Total pages 18
Place of publication Abingdon, Oxfordshire United Kingdom
Publisher Taylor & Francis
Collection year 2016
Language eng
Abstract The Texas Orocline is a prominent orogenic curvature that developed during the early Permian in the southern New England Orogen. Outliers preserving lower Permian sedimentary successions (Bondonga, Silver Spur, Pikedale, Terrica, Alum Rock and Ashford beds) approximately outline the oroclinal structure, but the tectonic processes responsible for the development of these basinal successions, and their relationships to the Texas Orocline, are unclear. Here we address this shortcoming by providing new U–Pb detrital and primary zircon ages from these successions, as well as detailed stratigraphic and structural data from the largest exposed succession (Bondonga beds). Field observations and U–Pb geochronological data suggest that the lower Permian successions in the Texas Orocline are remnants of a single, formerly larger basin that was deposited after ca 302 Ma. Time constraints for formation of this basin are correlative with constraints from the lower Permian Nambucca Block, which was likely deposited in response to regional back-arc extension during and/or after the development of the Texas Orocline. The conclusion that the lower Permian sedimentary basins in the Texas Orocline belong to this back-arc extensional system supports the suggestion that oroclinal bending in the New England Orogen was primarily controlled by trench retreat and associated overriding-plate extension.
Keyword New England Orogen
Oroclines
Texas Orocline
Early Permian
U-Pb geochronology
Zircon
Depositional age
Provenance
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Papers
Official 2016 Collection
 
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Created: Sun, 29 Nov 2015, 20:16:50 EST by Dr Gideon Rosenbaum on behalf of School of Earth Sciences