Life of the Bellingshausen plate
Eagles, Graeme; Gohl, Karsten; Larter, Robert D. ORCID: https://orcid.org/0000-0002-8414-7389.
2004
Life of the Bellingshausen plate.
Geophysical Research Letters, 31 (7), L07603.
5, pp.
https://doi.org/10.1029/2003GL019127
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Abstract/Summary
The onset of independent Bellingshausen plate movement in the South Pacific is estimated at just after chron C33o. This event closely follows a change in the offset sense on the transform arm of the Late Cretaceous Pacific-Phoenix-Antarctic triple junction and accompanies the creation and/or lengthening, by different mechanisms, of long-offsets on the Pacific-Antarctic ridge at the Udintsev, Tharp, Heezen and V transforms, as the triple junction stepped away from the ridge. At around chron C27, the Bellingshausen plate ceased to move independently and the Pacific-Antarctic ridge inherited the set of long offset transforms. Shortly afterwards, the gravity fabric on the flanks of much of the ridge displays evidence for a spreading rate decrease possibly related to transpression on the long-offset transforms. We speculate on a link between these events and regional tectonic changes around chron C27.
Item Type: | Publication - Article |
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Digital Object Identifier (DOI): | https://doi.org/10.1029/2003GL019127 |
Programmes: | BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Antarctica in the Dynamic Global Plate System |
ISSN: | 0094-8276 |
NORA Subject Terms: | Earth Sciences |
Date made live: | 16 Jan 2012 13:17 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/12154 |
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