Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/33872

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Title
Highstand transport of coastal sand to the deep ocean: a case study from Fraser Island, southeast Australia
Author/Creator
Boyd, Ron;  Ruming, Kevin;  Goodwin, Ian;  Sandstrom, Marianne;  Schroder-Adams, Claudia
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences
Description
Deep-water sands form a new frontier for marine geology and petroleum exploration, but how does sand reach the deep sea? Existing geological models predict that deep-water sands are mainly supplied from rivers during times of low sea level, or by incision of canyons into the shelf to tap river or longshore-transport sand sources. Here, we demonstrate that at high sea level, southeast Australian deep-water sands are delivered by a wave-driven coastal transport system, interacting with estuarine ebb tidal flows, that transports sand over the shelf edge at a change in margin orientation. Discovery of this new process results from an investigation that combines multibeam acoustic, microfaunal, zircon and luminescence dating, oceanographic, Landsat, remotely operated vehicle, and sediment property methods. Our longshore transport–driven model is capable of forecasting new locations for deep-water sand deposits in a predictive paleoclimatic and paleotectonic setting.
Relation
Geology Vol. 36, Issue 1, p. 15-18
Publisher Link
http://dx.doi.org/10.1130/G24211A.1
Date
2008
Publisher
Geological Society of America
Keyword(s)
longshore transport;  Sea level;  Fraser Island;  coastal;  ceep water;  sand transport;  high-stand;  sediment
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/33872
Identifier
ISSN:0091-7613
Reviewed
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Subject
"Geology"
 
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