منابع مشابه
Absence of Large Shield Volcanoes and Calderas on the Moon: Consequence of Magma Transport Phenomena?
Large shield volcanoes and calderas are not observed on the Moon. Theoretical assessments show that melt ascending from the mantle will stall at rheological traps or at the shallower density trap at the base of the low-density lunar crust. Magma will then only reach the surface along dikes propagated from these deep reservoirs, and such events will be infrequent and characterized by very large-...
متن کاملSubsidence of ash-flow calderas: relation to caldera size and magma-chamber geometry
Peter W. Lipman U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, USA e-mail: [email protected] Abstract Diverse subsidence geometries and collapse processes for ash-flow calderas are inferred to reflect varying sizes, roof geometries, and depths of the source magma chambers, in combination with prior volcanic and regional tectonic influences. Based largely on a revie...
متن کاملThermally assisted adiabatic quantum computation.
We study the effect of a thermal environment on adiabatic quantum computation using the Bloch-Redfield formalism. We show that in certain cases the environment can enhance the performance in two different ways: (i) by introducing a time scale for thermal mixing near the anticrossing that is smaller than the adiabatic time scale, and (ii) by relaxation after the anticrossing. The former can enha...
متن کاملA review of Anisotropy of Magnetic Susceptibility analysis of Indian dykes: Implications on magma emplacement
The analysis of Anisotropy of Magnetic Susceptibility (AMS) is a powerful and rapid technique to examine the preferred orientations of mineral (magnetic) fabrics and can indicate the nature of a magma transport (vertical or lateral). The relationship between magnetic fabric and geometry of a dyke swarm enables us to understand magma emplacement processes. Depending on the mutual relationship of...
متن کاملHow 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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ژورنال
عنوان ژورنال: Scientific Reports
سال: 2017
ISSN: 2045-2322
DOI: 10.1038/s41598-017-08638-y