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| Titel: |
Early carboniferous back-arc deformation in the Lachlan Fold Belt, Shoalhaven River-Ettrema Creek area, NSW |
| Auteur: |
Cooper, G. T. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 39 (1992) nr. 4 pagina's 529-537 |
| Jaar: |
1992-09 |
| Inhoud: |
Pre-Permian rocks of the Shoalhaven River and Ettrema Creek area are the easternmost exposure of the Lachlan Fold Belt. The Ordovician turbidite sequence consists of interbedded psammite and pelite and is overlain by the late Middle Devonian Grassy Gully Rhyolite and the terrestrial to shallow marine sedimentary rocks of the Late Devonian Merrimbula Group contained within the Budawang Syncline. Two periods of coaxial deformation under east-west compression have affected the rocks in the area. The first deformation produced tight to isoclinal folds in the Ordovician rocks and occurred before the emplacement of the Grassy Gully Rhyolite. The second event produced mega-kink folds in the Devonian succession and reverse faults. This event caused 21-22% shortening and occurred in the Early Carboniferous before the emplacement of a granite pluton at Yalwal. The tectonic setting of the Early Carboniferous event is interpreted as a back-arc environment and deformation may have resulted from high convergence similar to the Laramide Orogeny of the North American Cordillera. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 13 gevonden artikelen
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