Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core
During the 2007 ANDRILL campaign in the Ross Sea, Antarctica, the AND-2A core was recovered through a stratigraphic succession spanning 1138.54 m of Neogene sedimentary rocks that include an expanded Early to Middle Miocene sequence. The study reported here focuses on the magnetic properties of the...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.897964 2024-09-15T17:48:05+00:00 Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core Luigi, Jovane Florindo, Fabio Acton, Gary D Ohneiser, Christian Sagnotti, Leonardo Strada, Eleonora Verosub, Kenneth Lee Wilson, Gary S Iacoviello, Francesco Levy, Richard H Passchier, Sandra LATITUDE: -77.758141 * LONGITUDE: 165.276765 * DATE/TIME START: 2007-10-10T12:00:00 * DATE/TIME END: 2007-11-30T12:00:00 2019 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.897964 https://doi.org/10.1594/PANGAEA.897964 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.897964 https://doi.org/10.1594/PANGAEA.897964 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Jovane, Luigi; Florindo, Fabio; Acton, Gary D; Ohneiser, Christian; Sagnotti, Leonardo; Strada, Eleonora; Verosub, Kenneth Lee; Wilson, Gary S; Iacoviello, Francesco; Levy, Richard H; Passchier, Sandra (2019): Miocene Glacial Dynamics Recorded by Variations in Magnetic Properties in the ANDRILL‐2A Drill Core. Journal of Geophysical Research: Solid Earth, 124(3), 2297-2312, https://doi.org/10.1029/2018JB016865 AND-2A ANDRILL Antarctica Antarctic Geological Drilling DRILL Drilling/drill rig Early Miocene magnetic properties McMurdo Sound McMurdo Station Ross Sea SMS Southern McMurdo Sound volcanoes dataset publication series 2019 ftpangaea https://doi.org/10.1594/PANGAEA.89796410.1029/2018JB016865 2024-07-24T02:31:21Z During the 2007 ANDRILL campaign in the Ross Sea, Antarctica, the AND-2A core was recovered through a stratigraphic succession spanning 1138.54 m of Neogene sedimentary rocks that include an expanded Early to Middle Miocene sequence. The study reported here focuses on the magnetic properties of the interval from 778.63 meters below sea floor (mbsf) to 1138.54 mbsf, which comprises a time interval spanning 1.5 Myr, from ~18.7 to ~20.2 Ma. We recognise three main pulses of increased input of magnetic materials to the drill site between 778.34 - 903.06, 950.55 - 995.78 and 1040 - 1103.96 mbsf. Trends in magnetic mineral concentration dependent parameters mirror changes in the proportion of sediments derived from McMurdo Volcanic Group rocks. We suggest these pulses in magnetic mineral concentration reflect changes in sediment transport processes associated with changing glacial conditions at the drill site that included (1) subglacial and grounding zone proximal settings, (2) hemipelagic and neritic conditions with abundant sediment-rich icebergs, (3) grounding zone-distal environment that was covered by land-fast multi-year sea-ice or a fringing ice shelf. The magnetic minerals record preserved in the AND-2A core supports other data that indicate a highly dynamic and variable coastal environment during the Early Miocene, where glaciers retreated inland under warm climatic conditions and advanced beyond the drill site across the continental shelf when cold climate prevailed. Other/Unknown Material Antarc* Antarctic Antarctica Ice Shelf Iceberg* McMurdo Sound Ross Sea Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(165.276765,165.276765,-77.758141,-77.758141) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AND-2A ANDRILL Antarctica Antarctic Geological Drilling DRILL Drilling/drill rig Early Miocene magnetic properties McMurdo Sound McMurdo Station Ross Sea SMS Southern McMurdo Sound volcanoes |
spellingShingle |
AND-2A ANDRILL Antarctica Antarctic Geological Drilling DRILL Drilling/drill rig Early Miocene magnetic properties McMurdo Sound McMurdo Station Ross Sea SMS Southern McMurdo Sound volcanoes Luigi, Jovane Florindo, Fabio Acton, Gary D Ohneiser, Christian Sagnotti, Leonardo Strada, Eleonora Verosub, Kenneth Lee Wilson, Gary S Iacoviello, Francesco Levy, Richard H Passchier, Sandra Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core |
topic_facet |
AND-2A ANDRILL Antarctica Antarctic Geological Drilling DRILL Drilling/drill rig Early Miocene magnetic properties McMurdo Sound McMurdo Station Ross Sea SMS Southern McMurdo Sound volcanoes |
description |
During the 2007 ANDRILL campaign in the Ross Sea, Antarctica, the AND-2A core was recovered through a stratigraphic succession spanning 1138.54 m of Neogene sedimentary rocks that include an expanded Early to Middle Miocene sequence. The study reported here focuses on the magnetic properties of the interval from 778.63 meters below sea floor (mbsf) to 1138.54 mbsf, which comprises a time interval spanning 1.5 Myr, from ~18.7 to ~20.2 Ma. We recognise three main pulses of increased input of magnetic materials to the drill site between 778.34 - 903.06, 950.55 - 995.78 and 1040 - 1103.96 mbsf. Trends in magnetic mineral concentration dependent parameters mirror changes in the proportion of sediments derived from McMurdo Volcanic Group rocks. We suggest these pulses in magnetic mineral concentration reflect changes in sediment transport processes associated with changing glacial conditions at the drill site that included (1) subglacial and grounding zone proximal settings, (2) hemipelagic and neritic conditions with abundant sediment-rich icebergs, (3) grounding zone-distal environment that was covered by land-fast multi-year sea-ice or a fringing ice shelf. The magnetic minerals record preserved in the AND-2A core supports other data that indicate a highly dynamic and variable coastal environment during the Early Miocene, where glaciers retreated inland under warm climatic conditions and advanced beyond the drill site across the continental shelf when cold climate prevailed. |
format |
Other/Unknown Material |
author |
Luigi, Jovane Florindo, Fabio Acton, Gary D Ohneiser, Christian Sagnotti, Leonardo Strada, Eleonora Verosub, Kenneth Lee Wilson, Gary S Iacoviello, Francesco Levy, Richard H Passchier, Sandra |
author_facet |
Luigi, Jovane Florindo, Fabio Acton, Gary D Ohneiser, Christian Sagnotti, Leonardo Strada, Eleonora Verosub, Kenneth Lee Wilson, Gary S Iacoviello, Francesco Levy, Richard H Passchier, Sandra |
author_sort |
Luigi, Jovane |
title |
Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core |
title_short |
Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core |
title_full |
Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core |
title_fullStr |
Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core |
title_full_unstemmed |
Miocene glacial dynamics recorded by variations in magnetic properties in the ANDRILL AND-2 drill core |
title_sort |
miocene glacial dynamics recorded by variations in magnetic properties in the andrill and-2 drill core |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.897964 https://doi.org/10.1594/PANGAEA.897964 |
op_coverage |
LATITUDE: -77.758141 * LONGITUDE: 165.276765 * DATE/TIME START: 2007-10-10T12:00:00 * DATE/TIME END: 2007-11-30T12:00:00 |
long_lat |
ENVELOPE(165.276765,165.276765,-77.758141,-77.758141) |
genre |
Antarc* Antarctic Antarctica Ice Shelf Iceberg* McMurdo Sound Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Iceberg* McMurdo Sound Ross Sea Sea ice |
op_source |
Supplement to: Jovane, Luigi; Florindo, Fabio; Acton, Gary D; Ohneiser, Christian; Sagnotti, Leonardo; Strada, Eleonora; Verosub, Kenneth Lee; Wilson, Gary S; Iacoviello, Francesco; Levy, Richard H; Passchier, Sandra (2019): Miocene Glacial Dynamics Recorded by Variations in Magnetic Properties in the ANDRILL‐2A Drill Core. Journal of Geophysical Research: Solid Earth, 124(3), 2297-2312, https://doi.org/10.1029/2018JB016865 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.897964 https://doi.org/10.1594/PANGAEA.897964 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.89796410.1029/2018JB016865 |
_version_ |
1810289020567027712 |