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Australian provenance for Upper Permian to Cretaceous rocks forming accretionary complexes on the New Zealand sector of the Gondwanaland margin

Authors :
Mark Barley
A.L. Pickard
Christopher J. Adams
Source :
Australian Journal of Earth Sciences. 47:987-1007
Publication Year :
2000
Publisher :
Informa UK Limited, 2000.

Abstract

U–Pb (SHRIMP) detrital zircon age patterns are reported for 12 samples of Permian to Cretaceous turbiditic quartzo‐feldspathic sandstone from the Torlesse and Waipapa suspect terranes of New Zealand. Their major Permian to Triassic, and minor Early Palaeozoic and Mesoproterozoic, age components indicate that most sediment was probably derived from the Carboniferous to Triassic New England Orogen in northeastern Australia. Rapid deposition of voluminous Torlesse/Waipapa turbidite fans during the Late Permian to Late Triassic appears to have been directly linked to uplift and exhumation of the magmatically active orogen during the 265–230 Ma Hunter‐Bowen event. This period of cordilleran‐type orogeny allowed transport of large volumes of quartzo‐feldspathic sediment across the convergent Gondwanaland margin. Post‐Triassic depocentres also received (recycled?) sediment from the relict orogen as well as from Jurassic and Cretaceous volcanic provinces now offshore from southern Queensland and northern New Sout...

Details

ISSN :
14400952 and 08120099
Volume :
47
Database :
OpenAIRE
Journal :
Australian Journal of Earth Sciences
Accession number :
edsair.doi...........0f2cb4e12a191421caf483645056f337
Full Text :
https://doi.org/10.1046/j.1440-0952.2000.00826.x