Age model of ODP Site 162-983
At ODP Site 983, relative geomagnetic paleointensity and planktic and benthic delta18O records have been acquired for the last 350 kyr. The mean sedimentation rate in this interval is 11.3 cm/kyr. Magnetic properties and hysteresis ratios indicate that pseudo-single domain magnetite is the remanence...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.715010 2024-09-15T18:14:14+00:00 Age model of ODP Site 162-983 Channell, James E T Hodell, David A Lehman, Benoît LATITUDE: 60.403500 * LONGITUDE: -23.640667 * DATE/TIME START: 1995-07-21T00:00:00 * DATE/TIME END: 1995-07-24T00:00:00 1997 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.715010 https://doi.org/10.1594/PANGAEA.715010 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.715010 https://doi.org/10.1594/PANGAEA.715010 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Channell, James E T; Hodell, David A; Lehman, Benoît (1997): Relative geomagnetic paleointensity and d18O at ODP Site 983 (Gardar Drift, North Atlantic) since 350 ka. Earth and Planetary Science Letters, 153(1-2), 103-118, https://doi.org/10.1016/S0012-821X(97)00164-7 162-983 COMPCORE Composite Core Joides Resolution Leg162 North Atlantic Ocean Ocean Drilling Program ODP dataset publication series 1997 ftpangaea https://doi.org/10.1594/PANGAEA.71501010.1016/S0012-821X(97)00164-7 2024-08-21T00:02:25Z At ODP Site 983, relative geomagnetic paleointensity and planktic and benthic delta18O records have been acquired for the last 350 kyr. The mean sedimentation rate in this interval is 11.3 cm/kyr. Magnetic properties and hysteresis ratios indicate that pseudo-single domain magnetite is the remanence carrier. Volume susceptibility (kappa), anhysteretic (ARM) and isothermal (IRM) remanence values vary by a factor of 3-4, well within the criteria usually cited for paleointensity studies. Natural remanent magnetization (NRM) is normalized by ARM and IRM to acquire the paleointensity proxy. Arithmetic means of NRM/ARM and NRM/IRM, calculated for five demagnetization steps in the 25-45 mT range, constitute the relative paleointensity estimates. Some paleointensity lows (particularly those at ~40, ~120 and ~188 ka) are associated with directional excursions of the field, especially the event at ~188 ka (referred to here as the Iceland Basin Event) that constitutes a short-lived polarity reversal. For the last 200 kyr, the records can be correlated with other high-resolution paleointensity records such as those from the Labrador Sea, Mediterranean/Somali Basin and Sulu Sea, implying that the millennial scale features are globally synchronous. A labeling system for paleointensity features is proposed that ties prominent highs and lows to oxygen isotope stages. Other/Unknown Material Iceland Labrador Sea North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-23.640667,-23.640667,60.403500,60.403500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
162-983 COMPCORE Composite Core Joides Resolution Leg162 North Atlantic Ocean Ocean Drilling Program ODP |
spellingShingle |
162-983 COMPCORE Composite Core Joides Resolution Leg162 North Atlantic Ocean Ocean Drilling Program ODP Channell, James E T Hodell, David A Lehman, Benoît Age model of ODP Site 162-983 |
topic_facet |
162-983 COMPCORE Composite Core Joides Resolution Leg162 North Atlantic Ocean Ocean Drilling Program ODP |
description |
At ODP Site 983, relative geomagnetic paleointensity and planktic and benthic delta18O records have been acquired for the last 350 kyr. The mean sedimentation rate in this interval is 11.3 cm/kyr. Magnetic properties and hysteresis ratios indicate that pseudo-single domain magnetite is the remanence carrier. Volume susceptibility (kappa), anhysteretic (ARM) and isothermal (IRM) remanence values vary by a factor of 3-4, well within the criteria usually cited for paleointensity studies. Natural remanent magnetization (NRM) is normalized by ARM and IRM to acquire the paleointensity proxy. Arithmetic means of NRM/ARM and NRM/IRM, calculated for five demagnetization steps in the 25-45 mT range, constitute the relative paleointensity estimates. Some paleointensity lows (particularly those at ~40, ~120 and ~188 ka) are associated with directional excursions of the field, especially the event at ~188 ka (referred to here as the Iceland Basin Event) that constitutes a short-lived polarity reversal. For the last 200 kyr, the records can be correlated with other high-resolution paleointensity records such as those from the Labrador Sea, Mediterranean/Somali Basin and Sulu Sea, implying that the millennial scale features are globally synchronous. A labeling system for paleointensity features is proposed that ties prominent highs and lows to oxygen isotope stages. |
format |
Other/Unknown Material |
author |
Channell, James E T Hodell, David A Lehman, Benoît |
author_facet |
Channell, James E T Hodell, David A Lehman, Benoît |
author_sort |
Channell, James E T |
title |
Age model of ODP Site 162-983 |
title_short |
Age model of ODP Site 162-983 |
title_full |
Age model of ODP Site 162-983 |
title_fullStr |
Age model of ODP Site 162-983 |
title_full_unstemmed |
Age model of ODP Site 162-983 |
title_sort |
age model of odp site 162-983 |
publisher |
PANGAEA |
publishDate |
1997 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.715010 https://doi.org/10.1594/PANGAEA.715010 |
op_coverage |
LATITUDE: 60.403500 * LONGITUDE: -23.640667 * DATE/TIME START: 1995-07-21T00:00:00 * DATE/TIME END: 1995-07-24T00:00:00 |
long_lat |
ENVELOPE(-23.640667,-23.640667,60.403500,60.403500) |
genre |
Iceland Labrador Sea North Atlantic |
genre_facet |
Iceland Labrador Sea North Atlantic |
op_source |
Supplement to: Channell, James E T; Hodell, David A; Lehman, Benoît (1997): Relative geomagnetic paleointensity and d18O at ODP Site 983 (Gardar Drift, North Atlantic) since 350 ka. Earth and Planetary Science Letters, 153(1-2), 103-118, https://doi.org/10.1016/S0012-821X(97)00164-7 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.715010 https://doi.org/10.1594/PANGAEA.715010 |
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.71501010.1016/S0012-821X(97)00164-7 |
_version_ |
1810452015038332928 |