Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula
Lack of foraminiferal carbonate in marine sediments deposited at high latitudes results in traditional oxygen isotope stratigraphy not playing a central role in Quaternary age control for a large portion of the globe. This limitation has affected the interpretation of Quaternary sediment drifts off...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier Ltd
2019
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/520804/ https://nora.nerc.ac.uk/id/eprint/520804/1/520804_Channell_Relative_paleointensity.pdf https://www.scopus.com/record/display.uri?eid=2-s2.0-85062906258&origin=SingleRecordEmailAlert&dgcid=raven_sc_search_en_us_email&txGid=3f109028e8dfa45c2942fdf32c1e0298 |
id |
ftnerc:oai:nora.nerc.ac.uk:520804 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:520804 2023-05-15T13:49:35+02:00 Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula Channell, James Xuan, Chuang Hodell, David Crowhurst, Simon Larter, Robert 2019-05-01 text http://nora.nerc.ac.uk/id/eprint/520804/ https://nora.nerc.ac.uk/id/eprint/520804/1/520804_Channell_Relative_paleointensity.pdf https://www.scopus.com/record/display.uri?eid=2-s2.0-85062906258&origin=SingleRecordEmailAlert&dgcid=raven_sc_search_en_us_email&txGid=3f109028e8dfa45c2942fdf32c1e0298 en eng Elsevier Ltd https://nora.nerc.ac.uk/id/eprint/520804/1/520804_Channell_Relative_paleointensity.pdf Channell, James; Xuan, Chuang; Hodell, David; Crowhurst, Simon; Larter, Robert orcid:0000-0002-8414-7389 . 2019 Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula. Quaternary Science Reviews, 211. 17-33. https://doi.org/10.1016/j.quascirev.2019.03.006 <https://doi.org/10.1016/j.quascirev.2019.03.006> cc_by_nc_nd_4 CC-BY-NC-ND Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.1016/j.quascirev.2019.03.006 2023-02-04T19:46:58Z Lack of foraminiferal carbonate in marine sediments deposited at high latitudes results in traditional oxygen isotope stratigraphy not playing a central role in Quaternary age control for a large portion of the globe. This limitation has affected the interpretation of Quaternary sediment drifts off the Antarctic Peninsula in a region critical for documenting past instability of the West Antarctic Ice Sheet (WAIS) and Antarctic Peninsula Ice Sheet (APIS). Here we use piston cores recovered from these sediment drifts in 2015 during cruise JR298 of the RRS James Clark Ross to test the usefulness for age control of relative paleointensity (RPI) data augmented by scant δ 18 O data. Thermomagnetic and magnetic hysteresis data, as well as isothermal remanent magnetization (IRM) acquisition curves, indicate the presence of prevalent magnetite and subordinate oxidized magnetite (“maghemite”) in the cored sediments. The magnetite is likely detrital. Maghemite is an authigenic mineral, associated with surface oxidation of magnetite grains, which occurs preferentially in the oxic zone of the uppermost sediments, and buried oxic zones deposited during prior interglacial climate stages. Low concentrations of labile organic matter apparently led to arrested pore-water sulfate reduction explaining oxic zone burial and downcore survival of the reactive maghemite coatings. At some sites, maghemitization has a debilitating effect on RPI proxies whereas at other sites maghemite is less evident and RPI proxies can be adequately matched to the RPI reference template. Published RPI data at ODP Site 1101, located on Drift 4, can be adequately correlated to contemporary RPI templates, probably as a result of disappearance (dissolution) of maghemite at sediment depths >∼10 m. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula West Antarctic Ice Sheet Quaternary Science Reviews 211 17 33 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Lack of foraminiferal carbonate in marine sediments deposited at high latitudes results in traditional oxygen isotope stratigraphy not playing a central role in Quaternary age control for a large portion of the globe. This limitation has affected the interpretation of Quaternary sediment drifts off the Antarctic Peninsula in a region critical for documenting past instability of the West Antarctic Ice Sheet (WAIS) and Antarctic Peninsula Ice Sheet (APIS). Here we use piston cores recovered from these sediment drifts in 2015 during cruise JR298 of the RRS James Clark Ross to test the usefulness for age control of relative paleointensity (RPI) data augmented by scant δ 18 O data. Thermomagnetic and magnetic hysteresis data, as well as isothermal remanent magnetization (IRM) acquisition curves, indicate the presence of prevalent magnetite and subordinate oxidized magnetite (“maghemite”) in the cored sediments. The magnetite is likely detrital. Maghemite is an authigenic mineral, associated with surface oxidation of magnetite grains, which occurs preferentially in the oxic zone of the uppermost sediments, and buried oxic zones deposited during prior interglacial climate stages. Low concentrations of labile organic matter apparently led to arrested pore-water sulfate reduction explaining oxic zone burial and downcore survival of the reactive maghemite coatings. At some sites, maghemitization has a debilitating effect on RPI proxies whereas at other sites maghemite is less evident and RPI proxies can be adequately matched to the RPI reference template. Published RPI data at ODP Site 1101, located on Drift 4, can be adequately correlated to contemporary RPI templates, probably as a result of disappearance (dissolution) of maghemite at sediment depths >∼10 m. |
format |
Article in Journal/Newspaper |
author |
Channell, James Xuan, Chuang Hodell, David Crowhurst, Simon Larter, Robert |
spellingShingle |
Channell, James Xuan, Chuang Hodell, David Crowhurst, Simon Larter, Robert Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula |
author_facet |
Channell, James Xuan, Chuang Hodell, David Crowhurst, Simon Larter, Robert |
author_sort |
Channell, James |
title |
Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula |
title_short |
Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula |
title_full |
Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula |
title_fullStr |
Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula |
title_full_unstemmed |
Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula |
title_sort |
relative paleointensity (rpi) and age control in quaternary sediment drifts off the antarctic peninsula |
publisher |
Elsevier Ltd |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/520804/ https://nora.nerc.ac.uk/id/eprint/520804/1/520804_Channell_Relative_paleointensity.pdf https://www.scopus.com/record/display.uri?eid=2-s2.0-85062906258&origin=SingleRecordEmailAlert&dgcid=raven_sc_search_en_us_email&txGid=3f109028e8dfa45c2942fdf32c1e0298 |
geographic |
Antarctic The Antarctic Antarctic Peninsula West Antarctic Ice Sheet |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520804/1/520804_Channell_Relative_paleointensity.pdf Channell, James; Xuan, Chuang; Hodell, David; Crowhurst, Simon; Larter, Robert orcid:0000-0002-8414-7389 . 2019 Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula. Quaternary Science Reviews, 211. 17-33. https://doi.org/10.1016/j.quascirev.2019.03.006 <https://doi.org/10.1016/j.quascirev.2019.03.006> |
op_rights |
cc_by_nc_nd_4 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.quascirev.2019.03.006 |
container_title |
Quaternary Science Reviews |
container_volume |
211 |
container_start_page |
17 |
op_container_end_page |
33 |
_version_ |
1766251802941980672 |