The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments
Ocean Drilling Program (ODP) sites 984 and 983, located on North Atlantic sediment drifts, provide high-resolution records across the Matuyama-Brunhes boundary. At ODP site 984 (Bjorn Drift, Iceland Basin), the mean sedimentation rate in the 500-900 ka interval is ~12 cm kyr-1 based on an age model...
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fthighwire:oai:open-archive.highwire.org:gji:158/2/489 2023-05-15T16:50:55+02:00 The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments Channell, J. E. T. Curtis, J. H. Flower, B. P. 2004-08-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/158/2/489 https://doi.org/10.1111/j.1365-246X.2004.02329.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/158/2/489 http://dx.doi.org/10.1111/j.1365-246X.2004.02329.x Copyright (C) 2004, Oxford University Press Geomagnetism Rock Magnetism and Palaeomagnetism TEXT 2004 fthighwire https://doi.org/10.1111/j.1365-246X.2004.02329.x 2013-05-26T18:00:39Z Ocean Drilling Program (ODP) sites 984 and 983, located on North Atlantic sediment drifts, provide high-resolution records across the Matuyama-Brunhes boundary. At ODP site 984 (Bjorn Drift, Iceland Basin), the mean sedimentation rate in the 500-900 ka interval is ~12 cm kyr-1 based on an age model derived by matching the planktonic and benthic oxygen isotope records to an Ice Volume Model. The Matuyama-Brunhes polarity transition at site 984, as defined by virtual geomagnetic polar (VGP) latitudes <50°, has an apparent duration of ~7 kyr with a mid-point at 773.5 ka, compared with 772.5 ka at neighbouring site 983. Outside the polarity transition at both sites 984 and 983, excursions in VGP latitudes, to values <20°, at 540, 590 and 670 ka correspond to troughs in the palaeointensity record. New u-channel palaeomagnetic data across the Matuyama-Brunhes boundary, for working and archive halves of core sections from three holes at both sites 984 and 983, augment data published by <cross-ref type="bib" refid="bib8">Channell & Lehman (1997)</cross-ref> and are compared with back-to-back 1 cm3 discrete samples. Clusters of VGPs in the South Atlantic and northeast Asia in both u-channel and discrete sample records imply that polarity transition fields have characteristics similar to the modern non-axial-dipole (NAD) field. Text Iceland North Atlantic HighWire Press (Stanford University) Geophysical Journal International 158 2 489 505 |
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Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Geomagnetism Rock Magnetism and Palaeomagnetism |
spellingShingle |
Geomagnetism Rock Magnetism and Palaeomagnetism Channell, J. E. T. Curtis, J. H. Flower, B. P. The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments |
topic_facet |
Geomagnetism Rock Magnetism and Palaeomagnetism |
description |
Ocean Drilling Program (ODP) sites 984 and 983, located on North Atlantic sediment drifts, provide high-resolution records across the Matuyama-Brunhes boundary. At ODP site 984 (Bjorn Drift, Iceland Basin), the mean sedimentation rate in the 500-900 ka interval is ~12 cm kyr-1 based on an age model derived by matching the planktonic and benthic oxygen isotope records to an Ice Volume Model. The Matuyama-Brunhes polarity transition at site 984, as defined by virtual geomagnetic polar (VGP) latitudes <50°, has an apparent duration of ~7 kyr with a mid-point at 773.5 ka, compared with 772.5 ka at neighbouring site 983. Outside the polarity transition at both sites 984 and 983, excursions in VGP latitudes, to values <20°, at 540, 590 and 670 ka correspond to troughs in the palaeointensity record. New u-channel palaeomagnetic data across the Matuyama-Brunhes boundary, for working and archive halves of core sections from three holes at both sites 984 and 983, augment data published by <cross-ref type="bib" refid="bib8">Channell & Lehman (1997)</cross-ref> and are compared with back-to-back 1 cm3 discrete samples. Clusters of VGPs in the South Atlantic and northeast Asia in both u-channel and discrete sample records imply that polarity transition fields have characteristics similar to the modern non-axial-dipole (NAD) field. |
format |
Text |
author |
Channell, J. E. T. Curtis, J. H. Flower, B. P. |
author_facet |
Channell, J. E. T. Curtis, J. H. Flower, B. P. |
author_sort |
Channell, J. E. T. |
title |
The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments |
title_short |
The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments |
title_full |
The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments |
title_fullStr |
The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments |
title_full_unstemmed |
The Matuyama-Brunhes boundary interval (500-900 ka) in North Atlantic drift sediments |
title_sort |
matuyama-brunhes boundary interval (500-900 ka) in north atlantic drift sediments |
publisher |
Oxford University Press |
publishDate |
2004 |
url |
http://gji.oxfordjournals.org/cgi/content/short/158/2/489 https://doi.org/10.1111/j.1365-246X.2004.02329.x |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/158/2/489 http://dx.doi.org/10.1111/j.1365-246X.2004.02329.x |
op_rights |
Copyright (C) 2004, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.2004.02329.x |
container_title |
Geophysical Journal International |
container_volume |
158 |
container_issue |
2 |
container_start_page |
489 |
op_container_end_page |
505 |
_version_ |
1766041025956020224 |