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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Published in:Earth, Planets and Space
Main Authors: Schnepp, Elisabeth, Arneitz, Patrick, Ganerød, Morgan, Scholger, Robert, Fritz, Ingomar, Egli, Ramon, Leonhardt, Roman
Other Authors: Austrian Science Fund
Format: Article in Journal/Newspaper
Language:English
Published: Springer Science and Business Media LLC 2021
Subjects:
Online Access:http://dx.doi.org/10.1186/s40623-021-01518-w
https://link.springer.com/content/pdf/10.1186/s40623-021-01518-w.pdf
https://link.springer.com/article/10.1186/s40623-021-01518-w/fulltext.html
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spelling crspringernat:10.1186/s40623-021-01518-w 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 Austrian Science Fund 2021 http://dx.doi.org/10.1186/s40623-021-01518-w https://link.springer.com/content/pdf/10.1186/s40623-021-01518-w.pdf https://link.springer.com/article/10.1186/s40623-021-01518-w/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Earth, Planets and Space volume 73, issue 1 ISSN 1880-5981 Space and Planetary Science Geology journal-article 2021 crspringernat https://doi.org/10.1186/s40623-021-01518-w 2022-01-04T16:31:51Z 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 39 Ar/ 40 Ar dating. Virtual geomagnetic dipole moments range from 1.1 to 2.9·10 22 Am 2 for sites with low VGP latitudes below about 60° and from 3.0 to 9.3·10 22 Am 2 for sites with higher virtual geomagnetic pole latitudes. The new 39 Ar/ 40 Ar 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 Springer Nature (via Crossref) Earth, Planets and Space 73 1
institution Open Polar
collection Springer Nature (via Crossref)
op_collection_id crspringernat
language English
topic Space and Planetary Science
Geology
spellingShingle Space and Planetary Science
Geology
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 Space and Planetary Science
Geology
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 39 Ar/ 40 Ar dating. Virtual geomagnetic dipole moments range from 1.1 to 2.9·10 22 Am 2 for sites with low VGP latitudes below about 60° and from 3.0 to 9.3·10 22 Am 2 for sites with higher virtual geomagnetic pole latitudes. The new 39 Ar/ 40 Ar 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
author2 Austrian Science Fund
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 Springer Science and Business Media LLC
publishDate 2021
url http://dx.doi.org/10.1186/s40623-021-01518-w
https://link.springer.com/content/pdf/10.1186/s40623-021-01518-w.pdf
https://link.springer.com/article/10.1186/s40623-021-01518-w/fulltext.html
genre Geomagnetic Pole
genre_facet Geomagnetic Pole
op_source Earth, Planets and Space
volume 73, issue 1
ISSN 1880-5981
op_rights https://creativecommons.org/licenses/by/4.0
https://creativecommons.org/licenses/by/4.0
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op_doi https://doi.org/10.1186/s40623-021-01518-w
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