Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum
Relatively little is known in detail about the locations of the early Pleistocene ice sheets responsible for ice-rafted debris (IRD) inputs to the sub-polar North Atlantic Ocean during intensification of northern hemisphere glaciation (iNHG). To shed new light on this problem, we present the first c...
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ftsouthampton:oai:eprints.soton.ac.uk:338943 2024-02-11T10:04:26+01:00 Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum Bailey, Ian Foster, Gavin L. Wilson, P.A. Jovane, L. Storey, C.D. Trueman, C.N. Becker, J. 2012-05 https://eprints.soton.ac.uk/338943/ unknown Bailey, Ian, Foster, Gavin L., Wilson, P.A., Jovane, L., Storey, C.D., Trueman, C.N. and Becker, J. (2012) Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum. Earth and Planetary Science Letters, 341-344, 222-233. (doi:10.1016/j.epsl.2012.05.034 <http://dx.doi.org/10.1016/j.epsl.2012.05.034>). Article PeerReviewed 2012 ftsouthampton https://doi.org/10.1016/j.epsl.2012.05.034 2024-01-25T23:18:59Z Relatively little is known in detail about the locations of the early Pleistocene ice sheets responsible for ice-rafted debris (IRD) inputs to the sub-polar North Atlantic Ocean during intensification of northern hemisphere glaciation (iNHG). To shed new light on this problem, we present the first combined in-depth analysis of IRD flux and geochemical provenance of individual sand-sized IRD deposited in the sub-polar North Atlantic Ocean during the earliest large amplitude Pleistocene glacial, marine isotope stage (MIS) 100 (~2.52 Ma), arguably the key glacial during iNHG. IRD provenance is assessed using laser ablation lead (Pb) isotope analyses of single feldspar grains. We find that the Pb isotope composition (206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb) of individual ice-rafted (>150 ?m) feldspars deposited at DSDP Site 611A, ODP Site 981 and IODP Site U1308 during MIS 100 records a shift from predominantly Archaean aged circum-North Atlantic Ocean continental sources during early glacial ice-rafting events to dominantly Palaeozoic and Proterozoic-aged sources during full glacial conditions. The distribution of feldspars in Pb-Pb space for full glacial MIS 100 more closely resembles that documented for feldspars deposited at the centre of the last glacial IRD belt (at IODP/DSDP Site U1308/609) during ambient (non Heinrich event) ice-rafting episodes of MIS 2 (~23.8 ka) than that documented for MIS 5d (~106 ka). Comparison of our early Pleistocene and last glacial cycle datasets suggests that MIS 100 was characterised by abundant iceberg calving from large ice sheets on multiple continents in the high northern latitudes (not just on Greenland). Article in Journal/Newspaper Greenland North Atlantic University of Southampton: e-Prints Soton Greenland Earth and Planetary Science Letters 341-344 222 233 |
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Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Relatively little is known in detail about the locations of the early Pleistocene ice sheets responsible for ice-rafted debris (IRD) inputs to the sub-polar North Atlantic Ocean during intensification of northern hemisphere glaciation (iNHG). To shed new light on this problem, we present the first combined in-depth analysis of IRD flux and geochemical provenance of individual sand-sized IRD deposited in the sub-polar North Atlantic Ocean during the earliest large amplitude Pleistocene glacial, marine isotope stage (MIS) 100 (~2.52 Ma), arguably the key glacial during iNHG. IRD provenance is assessed using laser ablation lead (Pb) isotope analyses of single feldspar grains. We find that the Pb isotope composition (206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb) of individual ice-rafted (>150 ?m) feldspars deposited at DSDP Site 611A, ODP Site 981 and IODP Site U1308 during MIS 100 records a shift from predominantly Archaean aged circum-North Atlantic Ocean continental sources during early glacial ice-rafting events to dominantly Palaeozoic and Proterozoic-aged sources during full glacial conditions. The distribution of feldspars in Pb-Pb space for full glacial MIS 100 more closely resembles that documented for feldspars deposited at the centre of the last glacial IRD belt (at IODP/DSDP Site U1308/609) during ambient (non Heinrich event) ice-rafting episodes of MIS 2 (~23.8 ka) than that documented for MIS 5d (~106 ka). Comparison of our early Pleistocene and last glacial cycle datasets suggests that MIS 100 was characterised by abundant iceberg calving from large ice sheets on multiple continents in the high northern latitudes (not just on Greenland). |
format |
Article in Journal/Newspaper |
author |
Bailey, Ian Foster, Gavin L. Wilson, P.A. Jovane, L. Storey, C.D. Trueman, C.N. Becker, J. |
spellingShingle |
Bailey, Ian Foster, Gavin L. Wilson, P.A. Jovane, L. Storey, C.D. Trueman, C.N. Becker, J. Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum |
author_facet |
Bailey, Ian Foster, Gavin L. Wilson, P.A. Jovane, L. Storey, C.D. Trueman, C.N. Becker, J. |
author_sort |
Bailey, Ian |
title |
Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum |
title_short |
Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum |
title_full |
Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum |
title_fullStr |
Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum |
title_full_unstemmed |
Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum |
title_sort |
flux and provenance of ice-rafted debris in the earliest pleistocene sub-polar north atlantic ocean comparable to the last glacial maximum |
publishDate |
2012 |
url |
https://eprints.soton.ac.uk/338943/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_relation |
Bailey, Ian, Foster, Gavin L., Wilson, P.A., Jovane, L., Storey, C.D., Trueman, C.N. and Becker, J. (2012) Flux and provenance of ice-rafted debris in the earliest Pleistocene sub-polar North Atlantic Ocean comparable to the Last Glacial Maximum. Earth and Planetary Science Letters, 341-344, 222-233. (doi:10.1016/j.epsl.2012.05.034 <http://dx.doi.org/10.1016/j.epsl.2012.05.034>). |
op_doi |
https://doi.org/10.1016/j.epsl.2012.05.034 |
container_title |
Earth and Planetary Science Letters |
container_volume |
341-344 |
container_start_page |
222 |
op_container_end_page |
233 |
_version_ |
1790601033993420800 |