Structure and tectonic history of the brisbane metamorphics in the brisbane area

Holcombe R.J. (1977) Structure and tectonic history of the brisbane metamorphics in the brisbane area. Journal of the Geological Society of Australia, 24 7-8: 475-490. doi:10.1080/00167617708729007


Author Holcombe R.J.
Title Structure and tectonic history of the brisbane metamorphics in the brisbane area
Journal name Journal of the Geological Society of Australia
ISSN 0016-7614
Publication date 1977-01-01
Sub-type Article (original research)
DOI 10.1080/00167617708729007
Volume 24
Issue 7-8
Start page 475
End page 490
Total pages 16
Subject 1900 Earth and Planetary Sciences
1901 Art Theory and Criticism
Abstract The Palaeozoic basement rocks of the Brisbane area have undergone three major deformations and a minor kinking episode. The central zone of Bunya Phyllite is dominated by a second-generation transposition layering whereas the flanking Neranleigh-Fernvale Beds are dominated by first-generation transposition structures. The major structure previously described in the area, the Indooroopilly Anticline, is an apparent antiform formed in part by the intersection of dominant first- and second-generation structures and in part by a major third-generation flxeure. The complete geometry of the first-generation layering across the structure is suggested using vergence relationships but the stratigraphic relations and the structure of the stratigraphic boundaries are virtually impossible to deduce. Two possibilities are suggested and a major conclusion is that the Bunya Phyllite may be merely a unit within the Neranleigh-Fernvale Beds. The first-generation deformation is a regional event whose effects can be traced north for some 500 km whereas the second- and third-generation structures are more restricted. There is evidence to suggest that all three generations may be related to the same tectonic event, possibly Carboniferous in age.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 23 Aug 2016, 13:50:53 EST by System User