Rheology of melts from the colli albani volcanic district (Italy): a case study
Rheology of melts from the colli albani volcanic district (Italy): a case study
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阿尔巴尼山火山区(意大利)熔体的流变学:案例研究
DOI:
10.1007/s00410-020-01720-1
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发表时间:
2020
影响因子:
3.5
通讯作者:
S Fanara
中科院分区:
文献类型:
--
作者:
Kleest C;SL Webb ;S Fanara
In this study the first viscosity measurements in the glass transition range of melts from highly explosive large-volume eruptions from the Colli Albani Volcanic District (CAVD) are presented. The magmas are ultrapotassic, rich in iron and CaO and characterised by a low silica content (< 45 wt%). Melt compositions range from tephri-phonolitic to foiditic. The Colli Albani eruptions appear anomalous since they produced a large volume of erupted material in spite of their silica undersaturated compositions. The viscosity of the Colli Albani melt changes as the melt composition evolves from the original melt to a country-rock contaminated melt to a crystal-bearing melt with a permanent decrease in liquid viscosity. Conventional estimations of viscosities assume these magmas to have a low viscosity. The presented data show that the melt viscosities are higher than expected. Taking into account further chemical or rheological features of a melt, the investigated CAVD melts are not that striking as assumed in comparison with other large-volume eruptions. Consequently, considering the alkaline-earth to alkaline ratio together with the SiO2content could provide an alternative when comparing large volume eruptions.
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DOI:
10.1130/abs/2016am-279885
发表时间:
2016
期刊:
The British journal of psychiatry : the journal of mental science
影响因子:
--
作者:
A. Whittington;A. Sehlke
通讯作者:
A. Sehlke
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
S. Webb
通讯作者:
S. Webb
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
Donald Bruce Dingwell;S. Webb
通讯作者:
S. Webb
影响因子:
3.9
作者:
Di Genova, Danilo;Sicola, Stefania;Spina, Laura
通讯作者:
Spina, Laura
影响因子:
3.5
作者:
C. Freda;M. Gaeta;V. Misiti;S. Mollo;D. Dolfi;P. Scarlato
通讯作者:
C. Freda;M. Gaeta;V. Misiti;S. Mollo;D. Dolfi;P. Scarlato