40Ar-39Ar dating and isotopic composition of groundmass and felspar samples from core AND-2A ...

The AND-2A drillcore (Antarctic Drilling Program-ANDRILL) was successfully completed in late 2007 on the Antarctic continental margin (Southern McMurdo Sound, Ross Sea) with the aim of tracking ice proximal to shallow marine environmental fluctuations and to document the 20-Ma evolution of the Erebu...

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Bibliographic Details
Main Authors: Di Vincenzo, Gianfranco, Bracciali, Laura, Del Carlo, Paola, Panter, Kurt S, Rocchi, Sergio
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2010
Subjects:
Drilling/drill rig
SMS
McMurdo Station
Antarctic Geological Drilling ANDRILL
International Polar Year 2007-2008 IPY
Antarctic
The Antarctic
Ross Sea
Victoria Land
McMurdo Sound
Antarc*
International Polar Year
IPY
Online Access:https://dx.doi.org/10.1594/pangaea.809107
https://doi.pangaea.de/10.1594/PANGAEA.809107
Description
Summary:The AND-2A drillcore (Antarctic Drilling Program-ANDRILL) was successfully completed in late 2007 on the Antarctic continental margin (Southern McMurdo Sound, Ross Sea) with the aim of tracking ice proximal to shallow marine environmental fluctuations and to document the 20-Ma evolution of the Erebus Volcanic Province. Lava clasts and tephra layers from the AND-2A drillcore were investigated from a petrographic and stratigraphic point of view and analyzed by the 40Ar-39Ar laser technique in order to constrain the age model of the core and to gain information on the style and nature of sediment deposition in the Victoria Land Basin since Early Miocene. Ten out of 17 samples yielded statistically robust 40Ar-39Ar ages, indicating that the AND-2A drillcore recovered <230 m of Middle Miocene (~128-358 m below sea floor, ~11.5-16.0 Ma) and >780 m of Early Miocene (~358-1093 m below sea floor, ~16.0-20.1 Ma). Results also highlight a nearly continuous stratigraphic record from at least 358 m below sea floor ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...

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