Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea)
Results of thermophysical investigations into the lavas of the island of Lipari (Southern Tyrrhenian Sea) are presented. Samples selected for laboratory measurements belong to four main magmatic cycles, which produced basaltic-andesitic, andesitic and rhyolitic lavas. The wet-bulk density and the th...
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
1997-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3826 |
| _version_ | 1811322344509014016 |
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| author | D. Russo R. Cabella P. Chiozzi M. Verdoya V. Pasquale |
| author_facet | D. Russo R. Cabella P. Chiozzi M. Verdoya V. Pasquale |
| author_sort | D. Russo |
| collection | DOAJ |
| description | Results of thermophysical investigations into the lavas of the island of Lipari (Southern Tyrrhenian Sea) are presented. Samples selected for laboratory measurements belong to four main magmatic cycles, which produced basaltic-andesitic, andesitic and rhyolitic lavas. The wet-bulk density and the thermal conductivity measured on 69 specimens range from 1900 to 2760 kg m-3 and from 1.02 to 2.88 W m-1 K-1, respectively. Porosity is never negligible and its influence on density is maximum in rhyolites of the third cycle. The thermal conductivity is also influenced by the amount of glass. Rhyolitic obsidians show values lower than other rhyolites, although the latter rocks have a larger average porosity. The radioactive heat production determined on 36 specimens varies with the rock type, depending on the amount of U, Th and K. In basic lavas of the first cycle its value is 0.95°± 0.30 mW m-3, while in rhyolites of the fourth cycle it attains 6.68°±0.61 mW m-3. A comparison between results of g-ray spectrometry and X-ray fluorescence points out that the assumption of equilibrium in the decay series of the isotopic elements seems fulfilled. The information obtained is useful not only for the interpretation of geophysical surveys but also for the understanding of the geochemical characteristics of lavas. |
| first_indexed | 2024-04-13T13:33:39Z |
| format | Article |
| id | doaj.art-4bfce4255c024d198e0bd6b2c54e8ec4 |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-04-13T13:33:39Z |
| publishDate | 1997-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-4bfce4255c024d198e0bd6b2c54e8ec42022-12-22T02:44:51ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X1997-06-0140610.4401/ag-3826Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea)D. RussoR. CabellaP. ChiozziM. VerdoyaV. PasqualeResults of thermophysical investigations into the lavas of the island of Lipari (Southern Tyrrhenian Sea) are presented. Samples selected for laboratory measurements belong to four main magmatic cycles, which produced basaltic-andesitic, andesitic and rhyolitic lavas. The wet-bulk density and the thermal conductivity measured on 69 specimens range from 1900 to 2760 kg m-3 and from 1.02 to 2.88 W m-1 K-1, respectively. Porosity is never negligible and its influence on density is maximum in rhyolites of the third cycle. The thermal conductivity is also influenced by the amount of glass. Rhyolitic obsidians show values lower than other rhyolites, although the latter rocks have a larger average porosity. The radioactive heat production determined on 36 specimens varies with the rock type, depending on the amount of U, Th and K. In basic lavas of the first cycle its value is 0.95°± 0.30 mW m-3, while in rhyolites of the fourth cycle it attains 6.68°±0.61 mW m-3. A comparison between results of g-ray spectrometry and X-ray fluorescence points out that the assumption of equilibrium in the decay series of the isotopic elements seems fulfilled. The information obtained is useful not only for the interpretation of geophysical surveys but also for the understanding of the geochemical characteristics of lavas.http://www.annalsofgeophysics.eu/index.php/annals/article/view/3826Aeolian Islandsvolcanic rocksindex propertiesthermal conductivityradioactive heat production |
| spellingShingle | D. Russo R. Cabella P. Chiozzi M. Verdoya V. Pasquale Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea) Annals of Geophysics Aeolian Islands volcanic rocks index properties thermal conductivity radioactive heat production |
| title | Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea) |
| title_full | Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea) |
| title_fullStr | Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea) |
| title_full_unstemmed | Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea) |
| title_short | Thermophysical properties of the Lipari lavas (Southern Tyrrhenian Sea) |
| title_sort | thermophysical properties of the lipari lavas southern tyrrhenian sea |
| topic | Aeolian Islands volcanic rocks index properties thermal conductivity radioactive heat production |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3826 |
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