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https://hdl.handle.net/2440/96093
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Type: | Journal article |
Title: | Tracking the Cretaceous transcontinental Ceduna River through Australia: the hafnium isotope record of detrital zircons from offshore southern Australia |
Author: | Lloyd, J. Collins, A. Payne, J. Glorie, S. Holford, S. Reid, A. |
Citation: | Geoscience Frontiers, 2016; 7(2):237-244 |
Publisher: | Elsevier |
Issue Date: | 2016 |
ISSN: | 1674-9871 |
Statement of Responsibility: | Jarred Lloyd, Alan S. Collins, Justin L. Payne, Stijn Glorie, Simon Holford, Anthony J. Reid |
Abstract: | The middle–upper Cretaceous Ceduna River system traversed continental Australia from the NE coast to the centre of the southern coast. At its mouth, it formed a vast delta system that is similar in scale to the Niger delta of West Africa. The delta system is composed of two main lobes that represent different phases of delta construction. A recent hypothesis has challenged the traditional idea that both lobes of the delta were derived from a transcontinental river system by suggesting that the upper lobe (Santonian–Maastrichtian) is instead derived from a restricted catchment within southern Australia. Hf isotopic data presented here fingerprint the original source of the upper delta lobe zircons to NE Australia, with data comparing well with similar U-Pb and Lu-Hf isotopic data from the Lachlan Orogen, the New England Orogen, the eastern Musgraves Province and the northern Flinders Ranges. These data do not preclude a model where the lobe is derived from recycled Eromanga Basin sediments during a phase of late Cretaceous inland Australian uplift, but when coupled with reconnaissance low-temperature thermochronometry from the region of the Ceduna River course indicating widespread Triassic–Jurassic exhumation, and comparisons with detrital zircon data from the Winton Formation upstream of any proposed uplift, we suggest that both lobes of the Ceduna Delta are likely to be derived from a transcontinental Ceduna River. |
Keywords: | Detrital zircon; Hf; U-Pb; Ceduna sub-basin; Bight basin; Australia |
Rights: | © 2015, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
DOI: | 10.1016/j.gsf.2015.06.001 |
Grant ID: | http://purl.org/au-research/grants/arc/FT120100340 |
Published version: | http://dx.doi.org/10.1016/j.gsf.2015.06.001 |
Appears in Collections: | Aurora harvest 3 Australian School of Petroleum publications |
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hdl_96093.pdf | Published version | 2.37 MB | Adobe PDF | View/Open |
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