Petrology of Moriyoshi volcano - Magma mixing event after caldera collapse.
نویسندگان
چکیده
منابع مشابه
How caldera collapse shapes the shallow emplacement and transfer of magma in active volcanoes
Calderas are topographic depressions formed by the collapse of a partly drained magma reservoir. At volcanic edifices with calderas, eruptive fissures can circumscribe the outer caldera rim, be oriented radially and/or align with the regional tectonic stress field. Constraining the mechanisms that govern this spatial arrangement is fundamental to understand the dynamics of shallow magma storage...
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Silicic calderas form during explosive volcanic eruptions when magma withdrawal triggers collapse along bounding faults. The nature of specific interactions between magmatism and tectonism in caldera-forming systems is, however, unclear. Regional stress patterns may control the location and geometry of magma reservoirs, which in turn may control the spatial and temporal development of faults. H...
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B. Riel,1 P. Milillo,1,2 M. Simons,1 P. Lundgren,3 H. Kanamori1 and S. Samsonov4 1Seismological Laboratory, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA. E-mail: [email protected] 2Scuola di Ingegneria, Università degli Studi della Basilicata, Viale dell’Ateneo Lucano 10, I-85100 Potenza, Italy 3Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA...
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The shallow part of Kilauea’s magma system is conceptually well-understood. Long-period and short-period (brittle-failure) earthquake swarms outline a near-vertical magma transport path beneath Kilauea’s summit to 20 km depth. A gravity high centered above the magma transport path demonstrates that Kilauea’s shallow magma system, established early in the volcano’s history, has remained fixed in...
متن کاملCaldera rim collapse: A hidden volcanic hazard
Following the emblematic fl ank collapse of Mount St Helens in 1981, numerous models of flank sliding have been proposed. These models have allowed to largely improve the understanding of mechanisms involved in such landslides, which represent a tremendous risk for populations living around volcanoes. In this article, a new mode of landslide formation, related to buried calderas, is described. ...
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ژورنال
عنوان ژورنال: The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists
سال: 1985
ISSN: 0021-4825,1883-0765
DOI: 10.2465/ganko1941.80.136