Journal cover Journal topic
Solid Earth An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 4.165 IF 4.165
  • IF 5-year value: 4.075 IF 5-year
    4.075
  • CiteScore value: 4.28 CiteScore
    4.28
  • SNIP value: 1.501 SNIP 1.501
  • SJR value: 1.060 SJR 1.060
  • IPP value: 4.21 IPP 4.21
  • h5-index value: 29 h5-index 29
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 27 Scimago H
    index 27
Volume 2, issue 2
Solid Earth, 2, 259-270, 2011
https://doi.org/10.5194/se-2-259-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.
Solid Earth, 2, 259-270, 2011
https://doi.org/10.5194/se-2-259-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 21 Nov 2011

Research article | 21 Nov 2011

Paleointensities on 8 ka obsidian from Mayor Island, New Zealand

A. Ferk1,2, R. Leonhardt1, K.-U. Hess2, and D. B. Dingwell2 A. Ferk et al.
  • 1Conrad Observatory, Central Institute for Meteorology and Geodynamics, 1190 Vienna, Austria
  • 2Department of Earth and Environmental Sciences, Ludwig-Maximilians-University, 80333 Munich, Germany

Abstract. 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.

Publications Copernicus
Download
Citation
Share