Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica
The AND-1B drill core recovered a 13.57 million year Miocene through Pleistocene record from beneath the McMurdo Ice Shelf in Antarctica (77.9°S, 167.1°E). Varying sedimentary facies in the 1285 m core indicate glacial-interglacial cyclicity with the proximity of ice at the site ranging from groundi...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.825106 2024-09-15T17:42:19+00:00 Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica Brachfeld, Stefanie A Pinzon, Juliana Darley, Jason Sagnotti, Leonardo Kuhn, Gerhard Florindo, Fabio Wilson, Gary S Ohneiser, Christian Monien, Donata Joseph, Leah H MEDIAN LATITUDE: -79.821550 * MEDIAN LONGITUDE: 173.975800 * SOUTH-BOUND LATITUDE: -87.415800 * WEST-BOUND LONGITUDE: 155.909200 * NORTH-BOUND LATITUDE: -71.635000 * EAST-BOUND LONGITUDE: -147.550000 * DATE/TIME START: 2006-10-31T00:00:00 * DATE/TIME END: 2006-12-26T00:00:00 2013 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.825106 https://doi.org/10.1594/PANGAEA.825106 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.825106 https://doi.org/10.1594/PANGAEA.825106 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Brachfeld, Stefanie A; Pinzon, Juliana; Darley, Jason; Sagnotti, Leonardo; Kuhn, Gerhard; Florindo, Fabio; Wilson, Gary S; Ohneiser, Christian; Monien, Donata; Joseph, Leah H (2013): Iron oxide tracers of ice sheet extent and sediment provenance in the ANDRILL AND-1B drill core, Ross Sea, Antarctica. Global and Planetary Change, 110(C), 420-433, https://doi.org/10.1016/j.gloplacha.2013.09.015 ANDRILL Antarctic Geological Drilling D-ANDRILL Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 dataset publication series 2013 ftpangaea https://doi.org/10.1594/PANGAEA.82510610.1016/j.gloplacha.2013.09.015 2024-07-24T02:31:21Z The AND-1B drill core recovered a 13.57 million year Miocene through Pleistocene record from beneath the McMurdo Ice Shelf in Antarctica (77.9°S, 167.1°E). Varying sedimentary facies in the 1285 m core indicate glacial-interglacial cyclicity with the proximity of ice at the site ranging from grounding of ice in 917 m of water to ice free marine conditions. Broader interpretation of climatic conditions of the wider Ross Sea Embayment is deduced from provenance studies. Here we present an analysis of the iron oxide assemblages in the AND-1B core and interpret their variability with respect to wider paleoclimatic conditions. The core is naturally divided into an upper and lower succession by an expanded 170 m thick volcanic interval between 590 and 760 m. Above 590 m the Plio-Pleistocene glacial cycles are diatom rich and below 760 m late Miocene glacial cycles are terrigenous. Electron microscopy and rock magnetic parameters confirm the subdivision with biogenic silica diluting the terrigenous input (fine pseudo-single domain and stable single domain titanomagnetite from the McMurdo Volcanic Group with a variety of textures and compositions) above 590 m. Below 760 m, the Miocene section consists of coarse-grained ilmenite and multidomain magnetite derived from Transantarctic Mountain lithologies. This may reflect ice flow patterns and the absence of McMurdo Volcanic Group volcanic centers or indicate that volcanic centers had not yet grown to a significant size. The combined rock magnetic and electron microscopy signatures of magnetic minerals serve as provenance tracers in both ice proximal and distal sedimentary units, aiding in the study of ice sheet extent and dynamics, and the identification of ice rafted debris sources and dispersal patterns in the Ross Sea sector of Antarctica. Other/Unknown Material Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Ice Shelf Ross Sea Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(155.909200,-147.550000,-71.635000,-87.415800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANDRILL Antarctic Geological Drilling D-ANDRILL Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
spellingShingle |
ANDRILL Antarctic Geological Drilling D-ANDRILL Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Brachfeld, Stefanie A Pinzon, Juliana Darley, Jason Sagnotti, Leonardo Kuhn, Gerhard Florindo, Fabio Wilson, Gary S Ohneiser, Christian Monien, Donata Joseph, Leah H Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica |
topic_facet |
ANDRILL Antarctic Geological Drilling D-ANDRILL Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
description |
The AND-1B drill core recovered a 13.57 million year Miocene through Pleistocene record from beneath the McMurdo Ice Shelf in Antarctica (77.9°S, 167.1°E). Varying sedimentary facies in the 1285 m core indicate glacial-interglacial cyclicity with the proximity of ice at the site ranging from grounding of ice in 917 m of water to ice free marine conditions. Broader interpretation of climatic conditions of the wider Ross Sea Embayment is deduced from provenance studies. Here we present an analysis of the iron oxide assemblages in the AND-1B core and interpret their variability with respect to wider paleoclimatic conditions. The core is naturally divided into an upper and lower succession by an expanded 170 m thick volcanic interval between 590 and 760 m. Above 590 m the Plio-Pleistocene glacial cycles are diatom rich and below 760 m late Miocene glacial cycles are terrigenous. Electron microscopy and rock magnetic parameters confirm the subdivision with biogenic silica diluting the terrigenous input (fine pseudo-single domain and stable single domain titanomagnetite from the McMurdo Volcanic Group with a variety of textures and compositions) above 590 m. Below 760 m, the Miocene section consists of coarse-grained ilmenite and multidomain magnetite derived from Transantarctic Mountain lithologies. This may reflect ice flow patterns and the absence of McMurdo Volcanic Group volcanic centers or indicate that volcanic centers had not yet grown to a significant size. The combined rock magnetic and electron microscopy signatures of magnetic minerals serve as provenance tracers in both ice proximal and distal sedimentary units, aiding in the study of ice sheet extent and dynamics, and the identification of ice rafted debris sources and dispersal patterns in the Ross Sea sector of Antarctica. |
format |
Other/Unknown Material |
author |
Brachfeld, Stefanie A Pinzon, Juliana Darley, Jason Sagnotti, Leonardo Kuhn, Gerhard Florindo, Fabio Wilson, Gary S Ohneiser, Christian Monien, Donata Joseph, Leah H |
author_facet |
Brachfeld, Stefanie A Pinzon, Juliana Darley, Jason Sagnotti, Leonardo Kuhn, Gerhard Florindo, Fabio Wilson, Gary S Ohneiser, Christian Monien, Donata Joseph, Leah H |
author_sort |
Brachfeld, Stefanie A |
title |
Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica |
title_short |
Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica |
title_full |
Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica |
title_fullStr |
Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica |
title_full_unstemmed |
Analysis of the iron oxide assemblages in the ANDRILL AND-1B drill core, Ross Sea, Antarctica |
title_sort |
analysis of the iron oxide assemblages in the andrill and-1b drill core, ross sea, antarctica |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.825106 https://doi.org/10.1594/PANGAEA.825106 |
op_coverage |
MEDIAN LATITUDE: -79.821550 * MEDIAN LONGITUDE: 173.975800 * SOUTH-BOUND LATITUDE: -87.415800 * WEST-BOUND LONGITUDE: 155.909200 * NORTH-BOUND LATITUDE: -71.635000 * EAST-BOUND LONGITUDE: -147.550000 * DATE/TIME START: 2006-10-31T00:00:00 * DATE/TIME END: 2006-12-26T00:00:00 |
long_lat |
ENVELOPE(155.909200,-147.550000,-71.635000,-87.415800) |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Ice Shelf Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Ice Shelf Ross Sea Sea ice |
op_source |
Supplement to: Brachfeld, Stefanie A; Pinzon, Juliana; Darley, Jason; Sagnotti, Leonardo; Kuhn, Gerhard; Florindo, Fabio; Wilson, Gary S; Ohneiser, Christian; Monien, Donata; Joseph, Leah H (2013): Iron oxide tracers of ice sheet extent and sediment provenance in the ANDRILL AND-1B drill core, Ross Sea, Antarctica. Global and Planetary Change, 110(C), 420-433, https://doi.org/10.1016/j.gloplacha.2013.09.015 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.825106 https://doi.org/10.1594/PANGAEA.825106 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.82510610.1016/j.gloplacha.2013.09.015 |
_version_ |
1810488846266138624 |