Journal article
Continental growth and recycling by accretion of deformed turbidite fans and remnant ocean basins: Examples from Neoproterozoic and Phanerozoic orogens
DR Gray, DA Foster, R Maas, CV Spaggiari, RT Gregory, B Goscombe, KH Hoffmann
Memoir of the Geological Society of America | Published : 2007
Abstract
Convergent margin tectonic settings involving accretion of large turbidite fans represent important sites of growth and regeneration of continental crust. The newly accreted continental crust consists of an upper crustal layer of recycled crustal detritus (turbidites) underlain by a lower crustal layer of tectonically imbricated oceanic crust, and/or rifted and thinned continental crust, along with underplated magmatic materials; the new lower crust represents additions to continental crustal volume differentiated from the mantle. This two-tiered crust is of average continental crustal thickness and is isostatically balanced near sea level, resulting in remarkable stability. The Paleozoic Ta..
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Awarded by Australian Professorial Fellowship
Awarded by ARC
Awarded by National Science Foundation (NSF)
Awarded by Australian Research Council
Funding Acknowledgements
This review and write-up was undertaken as part of an Australian Research Council (ARC) Australian Professorial Fellowship (DP0210178 awarded to Gray). Research on the Tasmanides of eastern Australia has been undertaken over a period of 20 years, supported by ARC grants E8315666, E8315675, A38615754, A38715383, A38930784 (awarded to Gray), and A38615754 (Durney, Gray, Gregory); additional funding is from the Australian Geodynamic Cooperative Research Centre (to both Gray and Foster) and National Science Foundation (NSF) grant EAR-0073638 (to Foster). Research on New Zealand has been supported by ARC grants A39927139 and A39030706 (awarded to Gray) and a Monash University Small Grant (awarded to Gray). Research on Namibia has been funded by ARC Large Grant A00103456 (awarded to Gray) and NSF grant EAR-0440188 (awarded to Foster). We acknowledge discussions with (1) Chris Fergusson, Vince Morand, Nick Woodward, Clive Willman, John Miller, Chris Wilson, Thomas Flottmann, and Ron Berry on Tasmanides geology; (2) Simon Cox, Richard Norris, Dave Craw, Nick Mortimer, Moses Turnbull, and Alan Cooper on New Zealand geology; and (3) Cees Passchier, Rudolph Trouw, and Thomas Becker on Namibian geology.