Magnetostratigraphy of sediment cores from the eastern Arctic Ocean
A new high-resolution magnetostratigraphic record from the eastern Arctic Ocean has yielded further evidence for the existence of the Laschamp excursion (37–35 ka), the Mono Lake excursion (27–25.5 ka) and possibly another very short excursion (22 ka) inferred from steep negative inclinations. Ages...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.671685 2023-05-15T14:25:53+02:00 Magnetostratigraphy of sediment cores from the eastern Arctic Ocean Nowaczyk, Norbert R Knies, Jochen LATITUDE: 81.537667 * LONGITUDE: 30.876167 * DATE/TIME START: 1991-07-18T21:03:00 * DATE/TIME END: 1991-07-18T21:03:00 2000-03-16 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.671685 https://doi.org/10.1594/PANGAEA.671685 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.671685 https://doi.org/10.1594/PANGAEA.671685 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Nowaczyk, Norbert R; Knies, Jochen (2000): Magnetostratigraphic results from Eastern Arctic Ocean - AMS14C ages and relative palaeointensity data of the Mono Lake and Laschamp geomagnetic events. Geophysical Journal International, 140, 185-197, https://doi.org/10.1046/j.1365-246x.2000.00001.x ARK-VIII/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/112 PS19 EPOS II PS2138-1 Quaternary Environment of the Eurasian North QUEEN SL Svalbard Dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.671685 https://doi.org/10.1046/j.1365-246x.2000.00001.x 2023-01-20T07:31:06Z A new high-resolution magnetostratigraphic record from the eastern Arctic Ocean has yielded further evidence for the existence of the Laschamp excursion (37–35 ka), the Mono Lake excursion (27–25.5 ka) and possibly another very short excursion (22 ka) inferred from steep negative inclinations. Ages are based on nine AMS (accelerator mass spectrometry) 14C dates, oxygen isotope stratigraphy and correlation with ODP site 983. Estimates of relative palaeointensity variations for the time interval from 80 to 10 ka have revealed that the documented geomagnetic excursions are linked to large fluctuations of the relative palaeointensity. The lowest values were obtained for the two excursions and the normal–reversed (N–R) and reversed–normal (R–N) transitions of the Laschamp polarity excursion, which itself is characterized by a slight increase of relative palaeointensity during its reversed state. The results are in general agreement with palaeointensity studies from other regions, indicating that these fluctuations could be global phenomena and that the geomagnetic field of the Brunhes Chron was very variable in amplitude as well as in geometry. The new result is one of the rare records comprising large directional as well as large relative palaeointensity variations. Dataset Arctic Arctic Arctic Ocean Svalbard PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Svalbard ENVELOPE(30.876167,30.876167,81.537667,81.537667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ARK-VIII/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/112 PS19 EPOS II PS2138-1 Quaternary Environment of the Eurasian North QUEEN SL Svalbard |
spellingShingle |
ARK-VIII/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/112 PS19 EPOS II PS2138-1 Quaternary Environment of the Eurasian North QUEEN SL Svalbard Nowaczyk, Norbert R Knies, Jochen Magnetostratigraphy of sediment cores from the eastern Arctic Ocean |
topic_facet |
ARK-VIII/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS19/112 PS19 EPOS II PS2138-1 Quaternary Environment of the Eurasian North QUEEN SL Svalbard |
description |
A new high-resolution magnetostratigraphic record from the eastern Arctic Ocean has yielded further evidence for the existence of the Laschamp excursion (37–35 ka), the Mono Lake excursion (27–25.5 ka) and possibly another very short excursion (22 ka) inferred from steep negative inclinations. Ages are based on nine AMS (accelerator mass spectrometry) 14C dates, oxygen isotope stratigraphy and correlation with ODP site 983. Estimates of relative palaeointensity variations for the time interval from 80 to 10 ka have revealed that the documented geomagnetic excursions are linked to large fluctuations of the relative palaeointensity. The lowest values were obtained for the two excursions and the normal–reversed (N–R) and reversed–normal (R–N) transitions of the Laschamp polarity excursion, which itself is characterized by a slight increase of relative palaeointensity during its reversed state. The results are in general agreement with palaeointensity studies from other regions, indicating that these fluctuations could be global phenomena and that the geomagnetic field of the Brunhes Chron was very variable in amplitude as well as in geometry. The new result is one of the rare records comprising large directional as well as large relative palaeointensity variations. |
format |
Dataset |
author |
Nowaczyk, Norbert R Knies, Jochen |
author_facet |
Nowaczyk, Norbert R Knies, Jochen |
author_sort |
Nowaczyk, Norbert R |
title |
Magnetostratigraphy of sediment cores from the eastern Arctic Ocean |
title_short |
Magnetostratigraphy of sediment cores from the eastern Arctic Ocean |
title_full |
Magnetostratigraphy of sediment cores from the eastern Arctic Ocean |
title_fullStr |
Magnetostratigraphy of sediment cores from the eastern Arctic Ocean |
title_full_unstemmed |
Magnetostratigraphy of sediment cores from the eastern Arctic Ocean |
title_sort |
magnetostratigraphy of sediment cores from the eastern arctic ocean |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.671685 https://doi.org/10.1594/PANGAEA.671685 |
op_coverage |
LATITUDE: 81.537667 * LONGITUDE: 30.876167 * DATE/TIME START: 1991-07-18T21:03:00 * DATE/TIME END: 1991-07-18T21:03:00 |
long_lat |
ENVELOPE(30.876167,30.876167,81.537667,81.537667) |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Arctic Ocean Svalbard |
genre_facet |
Arctic Arctic Arctic Ocean Svalbard |
op_source |
Supplement to: Nowaczyk, Norbert R; Knies, Jochen (2000): Magnetostratigraphic results from Eastern Arctic Ocean - AMS14C ages and relative palaeointensity data of the Mono Lake and Laschamp geomagnetic events. Geophysical Journal International, 140, 185-197, https://doi.org/10.1046/j.1365-246x.2000.00001.x |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.671685 https://doi.org/10.1594/PANGAEA.671685 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.671685 https://doi.org/10.1046/j.1365-246x.2000.00001.x |
_version_ |
1766298371848404992 |