Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean
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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.786098 2024-09-15T18:10:07+00:00 Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean Bailey, Ian Foster, Gavin L Wilson, Paul A Jovane, Luigi Storey, Craig D Trueman, Clive N Becker, Julia MEDIAN LATITUDE: 51.579646 * MEDIAN LONGITUDE: -22.810641 * SOUTH-BOUND LATITUDE: 49.877767 * WEST-BOUND LONGITUDE: -30.309700 * NORTH-BOUND LATITUDE: 55.477500 * EAST-BOUND LONGITUDE: -14.650800 * DATE/TIME START: 1983-07-22T00:00:00 * DATE/TIME END: 1995-07-15T03:15:00 2012 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.786098 https://doi.org/10.1594/PANGAEA.786098 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.786098 https://doi.org/10.1594/PANGAEA.786098 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Bailey, Ian; Foster, Gavin L; Wilson, Paul A; Jovane, Luigi; Storey, Craig D; Trueman, Clive N; Becker, Julia (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, https://doi.org/10.1016/j.epsl.2012.05.034 Deep Sea Drilling Project DSDP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.78609810.1016/j.epsl.2012.05.034 2024-07-24T02:31:21Z 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 µm) 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). Other/Unknown Material Greenland North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-30.309700,-14.650800,55.477500,49.877767) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Deep Sea Drilling Project DSDP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP |
spellingShingle |
Deep Sea Drilling Project DSDP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP Bailey, Ian Foster, Gavin L Wilson, Paul A Jovane, Luigi Storey, Craig D Trueman, Clive N Becker, Julia Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean |
topic_facet |
Deep Sea Drilling Project DSDP Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP |
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 µm) 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 |
Other/Unknown Material |
author |
Bailey, Ian Foster, Gavin L Wilson, Paul A Jovane, Luigi Storey, Craig D Trueman, Clive N Becker, Julia |
author_facet |
Bailey, Ian Foster, Gavin L Wilson, Paul A Jovane, Luigi Storey, Craig D Trueman, Clive N Becker, Julia |
author_sort |
Bailey, Ian |
title |
Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean |
title_short |
Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean |
title_full |
Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean |
title_fullStr |
Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean |
title_full_unstemmed |
Feldspar Pb-isotope ratios for earliest Pleistocene sediments of the sub-polar North Atlantic Ocean |
title_sort |
feldspar pb-isotope ratios for earliest pleistocene sediments of the sub-polar north atlantic ocean |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.786098 https://doi.org/10.1594/PANGAEA.786098 |
op_coverage |
MEDIAN LATITUDE: 51.579646 * MEDIAN LONGITUDE: -22.810641 * SOUTH-BOUND LATITUDE: 49.877767 * WEST-BOUND LONGITUDE: -30.309700 * NORTH-BOUND LATITUDE: 55.477500 * EAST-BOUND LONGITUDE: -14.650800 * DATE/TIME START: 1983-07-22T00:00:00 * DATE/TIME END: 1995-07-15T03:15:00 |
long_lat |
ENVELOPE(-30.309700,-14.650800,55.477500,49.877767) |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
Supplement to: Bailey, Ian; Foster, Gavin L; Wilson, Paul A; Jovane, Luigi; Storey, Craig D; Trueman, Clive N; Becker, Julia (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, https://doi.org/10.1016/j.epsl.2012.05.034 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.786098 https://doi.org/10.1594/PANGAEA.786098 |
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.78609810.1016/j.epsl.2012.05.034 |
_version_ |
1810447723433820160 |