Geochemistry of IODP Site 306-U1314
Integrated Ocean Drilling Program (IODP) Site U1314 of the North Atlantic is a critical sedimentary archive record of subpolar deep water from the southern Gardar Drift for which we derived an age model of orbital resolution for the last 1.8 Ma. This chronology combined with high-resolution (cm scal...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.770384 2024-09-15T18:14:36+00:00 Geochemistry of IODP Site 306-U1314 Gruetzner, Jens Higgins, Sean M LATITUDE: 56.364000 * LONGITUDE: -27.888000 * DATE/TIME START: 2005-04-07T00:00:00 * DATE/TIME END: 2005-04-10T00:00:00 2010 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.770384 https://doi.org/10.1594/PANGAEA.770384 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.770384 https://doi.org/10.1594/PANGAEA.770384 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Gruetzner, Jens; Higgins, Sean M (2010): Threshold behavior of millennial scale variability in deep water hydrography inferred from a 1.1 Ma long record of sediment provenance at the southern Gardar Drift. Paleoceanography, 25, PA4204, https://doi.org/10.1029/2009PA001873 306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 2 North Atlantic Ocean dataset publication series 2010 ftpangaea https://doi.org/10.1594/PANGAEA.77038410.1029/2009PA001873 2024-08-21T00:02:25Z Integrated Ocean Drilling Program (IODP) Site U1314 of the North Atlantic is a critical sedimentary archive record of subpolar deep water from the southern Gardar Drift for which we derived an age model of orbital resolution for the last 1.8 Ma. This chronology combined with high-resolution (cm scale) X-ray fluorescence core scanning measurements of major elements allows tracking changes in terrigenous provenance during the last 1.1 Ma. Low Potassium to Titanium (K/Ti) ratios reflect enhanced transport of basalt-derived titanomagnetites during warm climate intervals, while high K/Ti ratios indicate a dominance of acidic sediment sources typical for glacial and stadial events. Changes in K/Ti and magnetic concentration at Site 1314 are coeval with fluctuations in smectite content and grain size data from nearby piston cores, suggesting that the provenance changes are mainly controlled by variable flow of the Iceland-Scotland Overflow Water, an important branch of North Atlantic Deep Water. Furthermore, K/Ti variations on orbital time scales show a striking similarity to the deep sea d13C record from ODP Site 607. Pervasive features of the K/Ti time series during and after the Mid-Pleistocene Transition are suborbital changes similar to Dansgaard/Oeschger and Bond oscillations that appear to be strongly amplified during ice growth phases when global benthic d18O was within the range of 4.1–4.6 per mil. The strong increase in variability of sediment provenance and subsequently deep hydrography at benthic d18O values below ~4.1 suggests that the extent of glaciations and, therefore, sea level corresponding to this value constitutes an important physical threshold that was persistent at least for the last 1.1 Ma. Other/Unknown Material Iceland North Atlantic Deep Water North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-27.888000,-27.888000,56.364000,56.364000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 2 North Atlantic Ocean |
spellingShingle |
306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 2 North Atlantic Ocean Gruetzner, Jens Higgins, Sean M Geochemistry of IODP Site 306-U1314 |
topic_facet |
306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic Climate 2 North Atlantic Ocean |
description |
Integrated Ocean Drilling Program (IODP) Site U1314 of the North Atlantic is a critical sedimentary archive record of subpolar deep water from the southern Gardar Drift for which we derived an age model of orbital resolution for the last 1.8 Ma. This chronology combined with high-resolution (cm scale) X-ray fluorescence core scanning measurements of major elements allows tracking changes in terrigenous provenance during the last 1.1 Ma. Low Potassium to Titanium (K/Ti) ratios reflect enhanced transport of basalt-derived titanomagnetites during warm climate intervals, while high K/Ti ratios indicate a dominance of acidic sediment sources typical for glacial and stadial events. Changes in K/Ti and magnetic concentration at Site 1314 are coeval with fluctuations in smectite content and grain size data from nearby piston cores, suggesting that the provenance changes are mainly controlled by variable flow of the Iceland-Scotland Overflow Water, an important branch of North Atlantic Deep Water. Furthermore, K/Ti variations on orbital time scales show a striking similarity to the deep sea d13C record from ODP Site 607. Pervasive features of the K/Ti time series during and after the Mid-Pleistocene Transition are suborbital changes similar to Dansgaard/Oeschger and Bond oscillations that appear to be strongly amplified during ice growth phases when global benthic d18O was within the range of 4.1–4.6 per mil. The strong increase in variability of sediment provenance and subsequently deep hydrography at benthic d18O values below ~4.1 suggests that the extent of glaciations and, therefore, sea level corresponding to this value constitutes an important physical threshold that was persistent at least for the last 1.1 Ma. |
format |
Other/Unknown Material |
author |
Gruetzner, Jens Higgins, Sean M |
author_facet |
Gruetzner, Jens Higgins, Sean M |
author_sort |
Gruetzner, Jens |
title |
Geochemistry of IODP Site 306-U1314 |
title_short |
Geochemistry of IODP Site 306-U1314 |
title_full |
Geochemistry of IODP Site 306-U1314 |
title_fullStr |
Geochemistry of IODP Site 306-U1314 |
title_full_unstemmed |
Geochemistry of IODP Site 306-U1314 |
title_sort |
geochemistry of iodp site 306-u1314 |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.770384 https://doi.org/10.1594/PANGAEA.770384 |
op_coverage |
LATITUDE: 56.364000 * LONGITUDE: -27.888000 * DATE/TIME START: 2005-04-07T00:00:00 * DATE/TIME END: 2005-04-10T00:00:00 |
long_lat |
ENVELOPE(-27.888000,-27.888000,56.364000,56.364000) |
genre |
Iceland North Atlantic Deep Water North Atlantic |
genre_facet |
Iceland North Atlantic Deep Water North Atlantic |
op_source |
Supplement to: Gruetzner, Jens; Higgins, Sean M (2010): Threshold behavior of millennial scale variability in deep water hydrography inferred from a 1.1 Ma long record of sediment provenance at the southern Gardar Drift. Paleoceanography, 25, PA4204, https://doi.org/10.1029/2009PA001873 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.770384 https://doi.org/10.1594/PANGAEA.770384 |
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.77038410.1029/2009PA001873 |
_version_ |
1810452368600334336 |