Global sediment thickness data set updated for the Australian-Antarctic Southern Ocean
We present a new, 5 min sediment thickness grid for the Australian‐Antarctic region (60°E–155°E, 30°S–70°S). New seismic reflection and refraction data have been used to add detail to the conjugate Australian and Antarctic margins and intervening ocean floor where regional sediment thickness pattern...
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Published in | Geochemistry, geophysics, geosystems : G3 Vol. 14; no. 8; pp. 3297 - 3305 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Washington
Blackwell Publishing Ltd
01.08.2013
John Wiley & Sons, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | We present a new, 5 min sediment thickness grid for the Australian‐Antarctic region (60°E–155°E, 30°S–70°S). New seismic reflection and refraction data have been used to add detail to the conjugate Australian and Antarctic margins and intervening ocean floor where regional sediment thickness patterns were poorly known previously. On the margins, sediment thickness estimates were computed from velocity‐depth functions from sonobuoy/refraction velocity solutions ground‐truthed against seismic reflection data. For the Southeast Indian Ridge abyssal plains, sediment thickness contours from Geli et al. (2007) were used. The new regional minimum sediment thickness grid was combined with the global National Geophysical Data Center (NGDC) sediment grid to create an updated global grid. Even using the minimum estimates, sediment accumulations on the extended Australian and Antarctic continental margins are 2 km thicker across large regions and up to 9 km thicker in the Ceduna Basin compared to the global NGDC compilation of sediment thickness data.
Key Points
Global minimum sediment thickness compilation updated for Australia Antarctica
Sediment thicknesses computed from seismic reflection and refraction data
Sediment thicknesses up to 9 km thicker than previously estimated |
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Bibliography: | ArticleID:GGGE20181 istex:C6CC0550CD3F9DEB0784A7A2D77D71BC529E2893 ARC - No. FL0992245 ark:/67375/WNG-ZGN9NP2V-5 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1525-2027 1525-2027 |
DOI: | 10.1002/ggge.20181 |