Results 211 to 220 of about 18,299,024 (255)
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The Solfatara Magmatic-Hydrothermal System
2022Solfatara volcano is situated close to the center of the Campi Flegrei caldera which, in the past, has alternatively experienced phases of resurgence and subsidence, traditionally indicated with the term bradyseism. Ludovico Sicardi (1895-1987) was an Italian scientist, who carried out pioneering studies on the Solfatara and other Italian volcanoes ...
Luigi Marini +2 more
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Seismic tomography of magmatic systems
Journal of Volcanology and Geothermal Research, 2007Abstract Seismic inversion for three-dimensional variations of velocity and attenuation are often used to delineate magma bodies in the crust and upper mantle. Problems related to spatial resolution and data noise can obscure details relevant to investigating magma chambers, and the introduction of smoothing constraints, or damping, causes blurring ...
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1984
Abstract The physical and chemical setting of geothermal systems is dominated by waters of surfi- cial origin; nevertheless, the heat sources are believed to be magma-s, and there is also a high probability that magmatic fluids contribute heat and some dissolved components H2s, SO2, CO2, … ) to the modern hydrothermal systems that are ...
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Abstract The physical and chemical setting of geothermal systems is dominated by waters of surfi- cial origin; nevertheless, the heat sources are believed to be magma-s, and there is also a high probability that magmatic fluids contribute heat and some dissolved components H2s, SO2, CO2, … ) to the modern hydrothermal systems that are ...
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The Petrogenesis of Magmatic Systems: Using Igneous Textures to Understand Magmatic Processes
2018An understanding of the petrogenesis of magmatic systems can be achieved by studying their constituent parts (e.g. crystals) and their chemical trends. Magmas are often travelling from source to emplacement levels together with a growing population of crystals.
Jerram, D.A. +3 more
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Redox potential of mantle magmatic systems
Petrology, 2010A new variant of the olivine-clinopyroxene-spinel oxygen barometer was developed on the basis of the equilibrium 3CaMgSi2O6(Cpx) + 2Fe3O4(Spl) = 3CaMgSiO4(Ol) + 3Fe2SiO4(Ol) + O2. Oxygen fugacity was estimated for the mineral assemblages of meymechites, olivine-bearing rocks of the Guli intrusion, and olivine and clinopyroxene microphenocrysts from ...
I. D. Ryabchikov, L. N. Kogarko
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PHENOMENOLOGICAL DESCRIPTION OF MAGMATIC FACIES AND STRUCTURE-DYNAMIC ZONES OF MAGMATIC SYSTEMS
Russian Geology and Geophysics, 1994When quantitatively modeling the development of magmatic systems it is reasonable to distinguish facies – initial and boundary conditions of the origination and evolution of systems, structure-thermodynamic zones appearing in the process of their development in magmatic chambers, magma conduits, intrusive bodies, and volcanoes. These zones occur in the
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ORE-MAGMATIC SYSTEM SUKUMALAND (TANZANIA)
Visnyk of Taras Shevchenko National University of Kyiv. Geology, 2019The overwhelming part of the gold ore potential of the United Republic of Tanzania is confined to the systems of the Neoarchaean greenstone belts (GSB) of the metallogenic province of Lake Victoria in the northwestern part of the country. Based on the interpretation of space imagery, in the western part of the province the Sukumaland ore-magmatic ...
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Kinetics of dissolution and growth in magmatic systems
2020In this study the kinetics of magmatic processes were investigated using experimental techniques and theoretical modelling. A series of dissolution and crystallization experiments have been conducted using piston cylinder apparatus on hydrous, metaluminous, granitic composition.
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Geochemical Fingerprinting and Magmatic Plumbing Systems
2014Subvolcanic systems are characterized by complex combinations of intrusive units (dykes, sills, saucer-shaped sills, cone sheets, etc.) for which genetic relationships are unclear. This chapter explains how whole-rock geochemistry may be used to resolve the genetic relationships of such subvolcanic (and volcanic) systems.
Christophe Y. Galerne +1 more
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