Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1

Abstract Pliocene volcanic rocks from south-east Austria were paleomagnetically investigated. Samples were taken from 28 sites located on eight different volcanoes. Rock magnetic investigations revealed that magnetic carriers are Ti-rich or Ti-poor titanomagnetites with mainly pseudo-single-domain c...

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Main Authors: Schnepp, Elisabeth, Arneitz, Patrick, Ganerød, Morgan, Scholger, Robert, Fritz, Ingomar, Egli, Ramon, Leonhardt, Roman
Format: Article in Journal/Newspaper
Language:unknown
Published: figshare 2021
Subjects:
Online Access:https://dx.doi.org/10.6084/m9.figshare.c.5645777
https://springernature.figshare.com/collections/Intermediate_field_directions_recorded_in_Pliocene_basalts_in_Styria_Austria_evidence_for_cryptochron_C2r_2r-1/5645777
id ftdatacite:10.6084/m9.figshare.c.5645777
record_format openpolar
spelling ftdatacite:10.6084/m9.figshare.c.5645777 2023-05-15T16:19:38+02:00 Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1 Schnepp, Elisabeth Arneitz, Patrick Ganerød, Morgan Scholger, Robert Fritz, Ingomar Egli, Ramon Leonhardt, Roman 2021 https://dx.doi.org/10.6084/m9.figshare.c.5645777 https://springernature.figshare.com/collections/Intermediate_field_directions_recorded_in_Pliocene_basalts_in_Styria_Austria_evidence_for_cryptochron_C2r_2r-1/5645777 unknown figshare https://dx.doi.org/10.1186/s40623-021-01518-w Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences Collection article 2021 ftdatacite https://doi.org/10.6084/m9.figshare.c.5645777 https://doi.org/10.1186/s40623-021-01518-w 2021-11-05T12:55:41Z Abstract Pliocene volcanic rocks from south-east Austria were paleomagnetically investigated. Samples were taken from 28 sites located on eight different volcanoes. Rock magnetic investigations revealed that magnetic carriers are Ti-rich or Ti-poor titanomagnetites with mainly pseudo-single-domain characteristics. Characteristic remanent magnetization directions were obtained from alternating field as well as from thermal demagnetization. Four localities give reversed directions agreeing with the expected direction from secular variation. Another four localities of the Klöch–Königsberg volcanic complex (3) and the Neuhaus volcano (1) have reversed directions with shallow inclinations and declinations of about 240° while the locality Steinberg yields a positive inclination of about 30° and 200° declination. These aberrant directions cannot be explained by local or regional tectonic movements. All virtual geomagnetic pole positions are located on the southern hemisphere. Four virtual geomagnetic poles lie close to the geographic pole, while all others are concentrated in a narrow longitude sector offshore South America (310°–355°) with low virtual geomagnetic pole latitudes ranging from − 15° to − 70°. The hypothesis that a transitional geomagnetic field configuration was recorded during the short volcanic activity of these five localities is supported by 9 paleointensity results and 39Ar/40Ar dating. Virtual geomagnetic dipole moments range from 1.1 to 2.9·1022 Am2 for sites with low VGP latitudes below about 60° and from 3.0 to 9.3·1022 Am2 for sites with higher virtual geomagnetic pole latitudes. The new 39Ar/40Ar ages of 2.51 ± 0.27 Ma for Klöch and 2.39 ± 0.03 Ma for Steinberg allow for the correlation of the Styrian transitional directions with cryptochron C2r.2r-1 of the geomagnetic polarity time scale. Graphic abstract Article in Journal/Newspaper Geomagnetic Pole DataCite Metadata Store (German National Library of Science and Technology)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Geology
FOS Earth and related environmental sciences
spellingShingle Geology
FOS Earth and related environmental sciences
Schnepp, Elisabeth
Arneitz, Patrick
Ganerød, Morgan
Scholger, Robert
Fritz, Ingomar
Egli, Ramon
Leonhardt, Roman
Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1
topic_facet Geology
FOS Earth and related environmental sciences
description Abstract Pliocene volcanic rocks from south-east Austria were paleomagnetically investigated. Samples were taken from 28 sites located on eight different volcanoes. Rock magnetic investigations revealed that magnetic carriers are Ti-rich or Ti-poor titanomagnetites with mainly pseudo-single-domain characteristics. Characteristic remanent magnetization directions were obtained from alternating field as well as from thermal demagnetization. Four localities give reversed directions agreeing with the expected direction from secular variation. Another four localities of the Klöch–Königsberg volcanic complex (3) and the Neuhaus volcano (1) have reversed directions with shallow inclinations and declinations of about 240° while the locality Steinberg yields a positive inclination of about 30° and 200° declination. These aberrant directions cannot be explained by local or regional tectonic movements. All virtual geomagnetic pole positions are located on the southern hemisphere. Four virtual geomagnetic poles lie close to the geographic pole, while all others are concentrated in a narrow longitude sector offshore South America (310°–355°) with low virtual geomagnetic pole latitudes ranging from − 15° to − 70°. The hypothesis that a transitional geomagnetic field configuration was recorded during the short volcanic activity of these five localities is supported by 9 paleointensity results and 39Ar/40Ar dating. Virtual geomagnetic dipole moments range from 1.1 to 2.9·1022 Am2 for sites with low VGP latitudes below about 60° and from 3.0 to 9.3·1022 Am2 for sites with higher virtual geomagnetic pole latitudes. The new 39Ar/40Ar ages of 2.51 ± 0.27 Ma for Klöch and 2.39 ± 0.03 Ma for Steinberg allow for the correlation of the Styrian transitional directions with cryptochron C2r.2r-1 of the geomagnetic polarity time scale. Graphic abstract
format Article in Journal/Newspaper
author Schnepp, Elisabeth
Arneitz, Patrick
Ganerød, Morgan
Scholger, Robert
Fritz, Ingomar
Egli, Ramon
Leonhardt, Roman
author_facet Schnepp, Elisabeth
Arneitz, Patrick
Ganerød, Morgan
Scholger, Robert
Fritz, Ingomar
Egli, Ramon
Leonhardt, Roman
author_sort Schnepp, Elisabeth
title Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1
title_short Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1
title_full Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1
title_fullStr Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1
title_full_unstemmed Intermediate field directions recorded in Pliocene basalts in Styria (Austria): evidence for cryptochron C2r.2r-1
title_sort intermediate field directions recorded in pliocene basalts in styria (austria): evidence for cryptochron c2r.2r-1
publisher figshare
publishDate 2021
url https://dx.doi.org/10.6084/m9.figshare.c.5645777
https://springernature.figshare.com/collections/Intermediate_field_directions_recorded_in_Pliocene_basalts_in_Styria_Austria_evidence_for_cryptochron_C2r_2r-1/5645777
genre Geomagnetic Pole
genre_facet Geomagnetic Pole
op_relation https://dx.doi.org/10.1186/s40623-021-01518-w
op_rights Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
cc-by-4.0
op_rightsnorm CC-BY
op_doi https://doi.org/10.6084/m9.figshare.c.5645777
https://doi.org/10.1186/s40623-021-01518-w
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