Results 31 to 40 of about 18,299,024 (255)

Analytical model of small fluctuations of compressible magma with Maxwell rheology in the feeding system of a volcano. Part 1. Density oscillation

open access: yesRussian Journal of Earth Sciences, 2023
The analytical mathematical model is presented that describes one of the possible mechanisms for the occurrence of long-period seismic events that are often recorded near active volcanic centers.
Radionoff Anatoly
doaj   +1 more source

Distinguishing shallow from mid-crustal magmatic processes at Soufrière Hills Volcano using Finite Element Modelling and co-analysis of EDM and GPS data

open access: yesVolcanica, 2023
We modelled ground deformation at Soufrière Hills Volcano (SHV), using data collected by the Montserrat Volcano Observatory from 2010–2019. We investigate the combined use of Electronic Distance Measuring (EDM) and Global Positioning System (GPS) to ...
Alexander Johnson   +4 more
doaj   +1 more source

BONINITES AS A CRITERION FOR THE GEODYNAMIC DEVELOPMENT OF MAGMATIC SYSTEMS IN PALEOSUBDUCTION ZONES IN GORNY ALTAI

open access: yesГеодинамика и тектонофизика, 2018
Ancient primary boninitic melts of the Gorny Altai (65–105 km, 1410–1590 °C) were studied from the composition of melt inclusions in clinopyroxenes.
A. V. Kotlyarov   +2 more
doaj   +1 more source

Thermomechanical modeling of magmatic systems

open access: yes, 2022
Magmatic systems and their volcanoes shape the lives of hundreds of millions of people around the globe. As these transcrustal systems cannot be directly observed, their structure and internal processes can only be inferred by modeling them and comparing the results to surface observations.
openaire   +3 more sources

Magnetite solubility and iron transport in magmatic-hydrothermal environments [PDF]

open access: yes, 2004
-We have examined the effect of pressure on the apparent equilibrium constant, K=, for magnetite solubility (Fe 3 O 4 mt ϩ 6HCl fluid ϩ H 2 fluid ϭ 3FeCl 2 fluid ϩ 4H 2 O fluid ) and the relative iron-carrying capacities of magmatic vapor and brine by ...
Heinrich, Christoph A.   +9 more
core   +2 more sources

Molybdenum isotope fractionation at upper-crustal magmatic-hydrothermal conditions [PDF]

open access: yes, 2021
Molybdenum isotopes are an established proxy for paleoredox conditions in low-temperature surface systems. However, the mechanisms behind demonstrated Mo isotope fractionation during igneous and hydrothermal processes at elevated temperatures are still ...
Pettke, Thomas   +6 more
core   +2 more sources

Exploring and Modeling the Magma–Hydrothermal Regime

open access: yesGeosciences, 2020
This special issue comprises 12 papers from authors in 10 countries with new insights on the close coupling between magma as an energy and fluid source with hydrothermal systems as a primary control of magmatic behavior.
John Eichelberger   +4 more
doaj   +1 more source

Sulfur and chlorine budgets control the ore fertility of arc magmas

open access: yesNature Communications, 2022
Earth’s largest copper deposits form in continental arcs, yet it is not well understood what determines whether a magmatic system generates economic mineralization or not.
Carter Grondahl, Zoltán Zajacz
doaj   +1 more source

Magmatic inclusions in martian meteorites [PDF]

open access: yes, 2005
P(論文)Magmatic inclusions in martian meteorites occur mainly within olivine and pyroxene grains. They are a few hundreds of micrometers to less than 10 micrometers across in size and have various mineral assemblages.
Ikeda, Yukio
core   +1 more source

Genetic relationship between greisenization and Sn–W mineralization in vein and greisen deposits: Insights from the Panasqueira deposit (Portugal)

open access: yesBSGF - Earth Sciences Bulletin, 2021
The W–Sn Panasqueira ore deposit is a magmatic-hydrothermal system, which includes a high-grade quartz-vein type mineralization and a disseminated greisen-type mineralization occurring in the upper part of the Panasqueira two-mica granite.
Launay Gaëtan   +5 more
doaj   +1 more source

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