Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244
We report geomagnetic directional paleosecular variation, relative paleointensity proxies and oxygen isotope data from the upper 88 m composite depth (mcd) at South Atlantic Ocean Drilling Program (ODP) Site 1089 (40°56.2?S, 9°53.64?E, 4620 m water depth). The age model is provided by high-resolutio...
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ftdatacite:10.1594/pangaea.808783 2023-05-15T13:33:00+02:00 Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244 Stoner, Joseph S Channell, James E T Hodell, David A Charles, Christopher D 2013 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.808783 https://doi.pangaea.de/10.1594/PANGAEA.808783 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2001jb001390 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY DEPTH, sediment/rock AGE Relative paleointensity proxy Maximum angular deviation NRM, Declination NRM, Inclination Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP Supplementary Dataset dataset Dataset 2013 ftdatacite https://doi.org/10.1594/pangaea.808783 https://doi.org/10.1029/2001jb001390 2022-02-08T16:24:46Z We report geomagnetic directional paleosecular variation, relative paleointensity proxies and oxygen isotope data from the upper 88 m composite depth (mcd) at South Atlantic Ocean Drilling Program (ODP) Site 1089 (40°56.2?S, 9°53.64?E, 4620 m water depth). The age model is provided by high-resolution oxygen isotope stratigraphy, augmented by radiocarbon dates from the upper 8 mcd of nearby piston core RC11-83. Mean sedimentation rates at Site 1089 are in the range of 15 to 20 cm/kyr. Two intervals during the Brunhes Chron, at ?29.6 mcd (?190 ka) and at ?48 mcd (?335 ka), have component magnetization directions with positive (reverse polarity) inclination; however, the excursional directions are heavily overprinted by the postexcursional field. Magnetite is the dominant carrier of magnetic remanence, and occurs in the pseudosingle-domain (PSD) grain size. An additional higher-coercivity magnetic carrier, characterized by low unblocking temperatures (<350°C), is assumed to be authigenic pyrrhotite. A decrease in magnetization intensity down core is mirrored by a reduction in pore water sulfate, indicating diagenetic reduction of magnetite. Despite down-core changes in magnetic mineralogy, normalized intensity records from Site 1089 are comparable with high-resolution paleointensity records from the North Atlantic (e.g., ODP Sites 983 and 984). Sediment properties and sedimentation patterns within the Cape (Site 1089) and Iceland (Sites 983 and 984) Basins are distinctly different at both millennial and orbital timescales and therefore preclude lithologic variability from being the source of this correlation. Variations in normalized intensity from Site 1089 therefore appear to reflect changes in global-scale geomagnetic field intensity. : Depth is mcd (meter composite depth). Dataset Antarc* Antarctic Iceland North Atlantic South Atlantic Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock AGE Relative paleointensity proxy Maximum angular deviation NRM, Declination NRM, Inclination Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
DEPTH, sediment/rock AGE Relative paleointensity proxy Maximum angular deviation NRM, Declination NRM, Inclination Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP Stoner, Joseph S Channell, James E T Hodell, David A Charles, Christopher D Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244 |
topic_facet |
DEPTH, sediment/rock AGE Relative paleointensity proxy Maximum angular deviation NRM, Declination NRM, Inclination Composite Core Leg177 Joides Resolution Ocean Drilling Program ODP |
description |
We report geomagnetic directional paleosecular variation, relative paleointensity proxies and oxygen isotope data from the upper 88 m composite depth (mcd) at South Atlantic Ocean Drilling Program (ODP) Site 1089 (40°56.2?S, 9°53.64?E, 4620 m water depth). The age model is provided by high-resolution oxygen isotope stratigraphy, augmented by radiocarbon dates from the upper 8 mcd of nearby piston core RC11-83. Mean sedimentation rates at Site 1089 are in the range of 15 to 20 cm/kyr. Two intervals during the Brunhes Chron, at ?29.6 mcd (?190 ka) and at ?48 mcd (?335 ka), have component magnetization directions with positive (reverse polarity) inclination; however, the excursional directions are heavily overprinted by the postexcursional field. Magnetite is the dominant carrier of magnetic remanence, and occurs in the pseudosingle-domain (PSD) grain size. An additional higher-coercivity magnetic carrier, characterized by low unblocking temperatures (<350°C), is assumed to be authigenic pyrrhotite. A decrease in magnetization intensity down core is mirrored by a reduction in pore water sulfate, indicating diagenetic reduction of magnetite. Despite down-core changes in magnetic mineralogy, normalized intensity records from Site 1089 are comparable with high-resolution paleointensity records from the North Atlantic (e.g., ODP Sites 983 and 984). Sediment properties and sedimentation patterns within the Cape (Site 1089) and Iceland (Sites 983 and 984) Basins are distinctly different at both millennial and orbital timescales and therefore preclude lithologic variability from being the source of this correlation. Variations in normalized intensity from Site 1089 therefore appear to reflect changes in global-scale geomagnetic field intensity. : Depth is mcd (meter composite depth). |
format |
Dataset |
author |
Stoner, Joseph S Channell, James E T Hodell, David A Charles, Christopher D |
author_facet |
Stoner, Joseph S Channell, James E T Hodell, David A Charles, Christopher D |
author_sort |
Stoner, Joseph S |
title |
Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244 |
title_short |
Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244 |
title_full |
Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244 |
title_fullStr |
Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244 |
title_full_unstemmed |
Paleomagnetic record of Site 177-1089, supplement to: Stoner, Joseph S; Channell, James E T; Hodell, David A; Charles, Christopher D (2003): A ~580 kyr paleomagnetic record from the sub-Antarctic South Atlantic (Ocean Drilling Program Site 1089). Journal of Geophysical Research: Solid Earth, 108(B5), 2244 |
title_sort |
paleomagnetic record of site 177-1089, supplement to: stoner, joseph s; channell, james e t; hodell, david a; charles, christopher d (2003): a ~580 kyr paleomagnetic record from the sub-antarctic south atlantic (ocean drilling program site 1089). journal of geophysical research: solid earth, 108(b5), 2244 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2013 |
url |
https://dx.doi.org/10.1594/pangaea.808783 https://doi.pangaea.de/10.1594/PANGAEA.808783 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Iceland North Atlantic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic Iceland North Atlantic South Atlantic Ocean |
op_relation |
https://dx.doi.org/10.1029/2001jb001390 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.808783 https://doi.org/10.1029/2001jb001390 |
_version_ |
1766037479599636480 |