Thermal, radioactive and magnetic properties of the lavas of the Mt Melbourne Volcanic Field (Victoria Land, Antarctica)
Main Article Content
Abstract
We present the results of measurements of physical properties carried out on mafic lavas from the Mt Melbourne
Volcanic Field, useful for interpretation of geophysical surveys designed to shed light on the structure of the
crust. The thermal conductivity is comparable to that of glass and shows a clear negative dependence on porosity.
The volume heat capacity and the thermal diffusivity are less variable. The concentration of the thermally
important natural radioactive isotopes was determined by gamma-ray spectrometry. Lavas denoted a rather low
heat-production rate, and the largest concentration of heat-producing elements (potassium, uranium, thorium)
was found in the trachyte samples. The magnetic susceptibility is more variable than the other physical properties
and, among the several iron-titanium oxides, it appears primarily controlled by the ulvöspinel-magnetite solid
solution series.
Volcanic Field, useful for interpretation of geophysical surveys designed to shed light on the structure of the
crust. The thermal conductivity is comparable to that of glass and shows a clear negative dependence on porosity.
The volume heat capacity and the thermal diffusivity are less variable. The concentration of the thermally
important natural radioactive isotopes was determined by gamma-ray spectrometry. Lavas denoted a rather low
heat-production rate, and the largest concentration of heat-producing elements (potassium, uranium, thorium)
was found in the trachyte samples. The magnetic susceptibility is more variable than the other physical properties
and, among the several iron-titanium oxides, it appears primarily controlled by the ulvöspinel-magnetite solid
solution series.
Article Details
How to Cite
Pasquale, V., Verdoya, M., Chiozzi, P. and Armadillo, E. (2009) “Thermal, radioactive and magnetic properties of the lavas of the Mt Melbourne Volcanic Field (Victoria Land, Antarctica)”, Annals of Geophysics, 52(2), pp. 197–207. doi: 10.4401/ag-4644.
Issue
Section
OLD
Open-Access License
No Permission Required
Istituto Nazionale di Geofisica e Vulcanologia applies the Creative Commons Attribution License (CCAL) to all works we publish.
Under the CCAL, authors retain ownership of the copyright for their article, but authors allow anyone to download, reuse, reprint, modify, distribute, so long as the original authors and source are cited. No permission is required from the authors or the publishers.
In most cases, appropriate attribution can be provided by simply citing the original article.
If the item you plan to reuse is not part of a published article (e.g., a featured issue image), then please indicate the originator of the work, and the volume, issue, and date of the journal in which the item appeared. For any reuse or redistribution of a work, you must also make clear the license terms under which the work was published.
This broad license was developed to facilitate open access to, and free use of, original works of all types. Applying this standard license to your own work will ensure your right to make your work freely and openly available. For queries about the license, please contact ann.geophys@ingv.it.