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| Signatur |
SE 15959-A
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| Titel |
Paleointensities on 8 ka obsidian from Mayor Island, New Zealand |
| VerfasserIn |
A. Ferk, R. Leonhardt, K.-U. Hess, D. B. Dingwell |
| Illustrationen |
7 Abb., 2 Tab.
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 2, no. 2 ; Nr. 2, no. 2 (2011-11-21), S.259-270 |
| Anmerkungen |
Literaturverz.S.269-270
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| Datensatznummer |
250000598
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| Publikation (Nr.) |
 copernicus.org/se-2-259-2011.pdf |
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| Schlagwörter |
Paläointensität, Obsidian, Mineralogie, Geomagnetik, Magnetfeld, Messung |
| Geograf. Schlagwort |
Neuseeland |
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| Zusammenfassung |
| The 8 ka BP (6050 BCE) pantelleritic obsidian flow on Mayor Island, Bay
of Plenty, New Zealand, has been investigated using 30 samples from two
sites. Due to a very high paramagnetic/ferromagnetic ratio, it was not
possible to determine the remanence carriers. This is despite the fact that
the samples were studied intensively at low, room, and high temperatures. We
infer that a stable remanence within the samples is carried by single- or
close to single-domain particles. Experiments to determine the anisotropy of
thermoremanence tensor and the dependency on cooling rate were hampered due
to alteration resulting from the repeated heating of the samples to
temperatures just below the glass transition. Nonetheless, a well-defined
mean paleointensity of 57.0 ± 1.0 μT, based on individual high
quality paleointensity determinations, was obtained. This field value
compares very well to a paleointensity of 58.1 ± 2.9 μT, which
Tanaka et al. (2009) obtained for 5500 BCE at a site 100 km distant. Agreement
with geomagnetic field models, however, is poor. Thus, gathering more
high-quality paleointensity data for the Pacific region and for the southern
hemisphere in general to better constrain global field models is very
important. |
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| SE 15959-A |
Separatum |
Neulinggasse_Magazin |
Verfügbar |
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