Viscosity changes during crystallization of a shoshonitic magma: new insights on lava flow emplacement
-
- VETERE Francesco
- Institut für Mineralogie, Universität Hannover
-
- SATO Hiroaki
- Department of Earth and Planetary Sciences, Graduate School of Science, Kobe University
-
- ISHIBASHI Hidemi
- Earthquake Research Institute, the University of Tokyo Present address: Department of Geosciences, Faculty of Science, Shizuoka University
-
- DE ROSA Rosanna
- Dipartimento di Scienze Della Terra, Università della Calabri
-
- DONATO Paola
- Dipartimento di Scienze Della Terra, Università della Calabri
この論文をさがす
抄録
Viscosity changes during the crystallization of a shoshonitic lava from the Vulcanello peninsula (Aeolian Islands, southern Tyrrhenian Sea, Italy) were measured by use of a electromagnetic rotational viscometer under Ni-NiO buffered conditions at temperatures ranging from 1539 K to 1381 K. Results showed an increase in effective viscosity from 131 Pa s to 15320 Pa s as the crystal content increased from 0 vol% to ∼ 14 vol%. The crystallization processes in the nominally dry shoshonite began at 1420 K with the formation of clinopyroxene, which was followed by the formation of plagioclase and olivine at 1401 K. Experimental observations differed from predictions derived from the use of the Einstein-Roscoe equation with the Marsh (E-R-M) parameter at crystal contents higher than 8 vol%. The relative viscosity of samples was larger than that calculated by E-R-M by a factor of up to 9.5 as the temperature decreased to 1381 K. The large departure of the experimental results from the E-R-M equation predictions was likely caused by the interaction of elongated pyroxene crystals. The measured viscosity data were used to estimate the potential for emplacement of shoshonitic lavas.
収録刊行物
-
- Journal of Mineralogical and Petrological Sciences
-
Journal of Mineralogical and Petrological Sciences 108 (3), 144-160, 2013
一般社団法人 日本鉱物科学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001206546432640
-
- NII論文ID
- 10031173676
-
- NII書誌ID
- AA11460926
-
- COI
- 1:CAS:528:DC%2BC3sXhsVSltb3K
-
- ISSN
- 13493825
- 13456296
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
- KAKEN
-
- 抄録ライセンスフラグ
- 使用不可