Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1-4 |
| Seitenumfang | 4 |
| Fachzeitschrift | Geophysical Research Letters |
| Jahrgang | 31 |
| Ausgabenummer | 24 |
| Publikationsstatus | Veröffentlicht - 28 Dez. 2004 |
Abstract
A dome from Lipari Island (Southern Italy) consists of 12 vol.% of circular, elongated and folded latitic enclaves hosted in a rhyolitic matrix. The dm- to cm-scale enclaves are more deformed than the mm-scale blobs. The critical value of the ratio between the viscous forces, which allow deformation and eventually break up blobs of latitic magma, and the interfacial tension forces is larger than 0.29. The Reynolds number is <5.3. The equivalent radius and the axial ratio of the enclaves follow power-law distributions. This feature suggests that the break up and stretching of magmas are non-linear, scale-invariant, probably cyclic processes. The coexistence of enclaves of different shape and the self-similar size distributions suggest that chaotic advection plays a major role in the formation of mingled magmas. Caution must be used when measuring the finite strain from enclave shapes because they may break apart during the deformation.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geophysik
- Erdkunde und Planetologie (insg.)
- Allgemeine Erdkunde und Planetologie
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in: Geophysical Research Letters, Jahrgang 31, Nr. 24, 28.12.2004, S. 1-4.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Non-linear deformation and break up of enclaves in a rhyolitic magma
T2 - A case study from Lipari Island (southern Italy)
AU - Holtz, Francois
AU - Lenné, Sascha
AU - Ventura, Guido
AU - Vetere, Francesco
AU - Wolf, Philipp
N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/12/28
Y1 - 2004/12/28
N2 - A dome from Lipari Island (Southern Italy) consists of 12 vol.% of circular, elongated and folded latitic enclaves hosted in a rhyolitic matrix. The dm- to cm-scale enclaves are more deformed than the mm-scale blobs. The critical value of the ratio between the viscous forces, which allow deformation and eventually break up blobs of latitic magma, and the interfacial tension forces is larger than 0.29. The Reynolds number is <5.3. The equivalent radius and the axial ratio of the enclaves follow power-law distributions. This feature suggests that the break up and stretching of magmas are non-linear, scale-invariant, probably cyclic processes. The coexistence of enclaves of different shape and the self-similar size distributions suggest that chaotic advection plays a major role in the formation of mingled magmas. Caution must be used when measuring the finite strain from enclave shapes because they may break apart during the deformation.
AB - A dome from Lipari Island (Southern Italy) consists of 12 vol.% of circular, elongated and folded latitic enclaves hosted in a rhyolitic matrix. The dm- to cm-scale enclaves are more deformed than the mm-scale blobs. The critical value of the ratio between the viscous forces, which allow deformation and eventually break up blobs of latitic magma, and the interfacial tension forces is larger than 0.29. The Reynolds number is <5.3. The equivalent radius and the axial ratio of the enclaves follow power-law distributions. This feature suggests that the break up and stretching of magmas are non-linear, scale-invariant, probably cyclic processes. The coexistence of enclaves of different shape and the self-similar size distributions suggest that chaotic advection plays a major role in the formation of mingled magmas. Caution must be used when measuring the finite strain from enclave shapes because they may break apart during the deformation.
KW - 3220 Mathematical geophysics: Nonlinear dynamics
KW - 3640 Mineralogy and petrology: Igneous petrology
KW - 8025 Structural geology: Mesoscopic fabrics
KW - 8145 Tectonophysics: Physics of magma and magma bodies
KW - 8429 Volcanology: Lava rheology and morphology
UR - http://www.scopus.com/inward/record.url?scp=14544269840&partnerID=8YFLogxK
U2 - 10.1029/2004GL021590
DO - 10.1029/2004GL021590
M3 - Article
AN - SCOPUS:14544269840
VL - 31
SP - 1
EP - 4
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 24
ER -