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Showing 1 to 10 of 10 for “"magma recharge"”.
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Quantifying magma recharge at Parinacota volcano, northern Chile (52 ka - recent): Insight from the Magma Chamber Simulator
The Magma Chamber Simulator (MCS; Bohrson et al., 2014) was used to produce new thermodynamic models that constrain and quantify recharge and fractional crystallization (RFC) processes for the Old Cone (OC; 52-20 ka; 56-66 wt.% SiO<sub>2</sub>) and Healing Flows (HF; >8 ka-recent; 58-64 wt.% …
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Documenting the Origin of Compositional Diversity of Subduction Zone Magmatism, Alicudi, Aeolian Arc (Southern Tyrrhenian Sea, Italy) Using in situ Plagioclase Data
<p>Processes that generate magma compositional diversity are important to document because composition affects degree of explosivity, which impacts hazard mitigation. Magnesium to silicon rich magmas are produced by processes such as magma recharge, assimilation, and fractional crystallization …
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Documenting Magma Evolution of the Fossa delle Felci (Salina Island, South Tyrrhenian Sea) by Integrating In Situ Plagioclase Data with Quantitative Modeling
… diversity occurs via processes dominated by recharge, assimilation and fractional crystallization (RAFC), quantification of which can provide insights into eruption catalysts, and therefore assist in hazard mitigation. This study evaluates the relative roles of RAFC processes in Fossa delle …
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Timing and Source of Alkali Enrichment at Mt. Etna, Sicily: Constraints from Clinopyroxene Geobarometry and In Situ SR Isotope Data
… characterize the evolution of the subvolcanic magma storage and transport system, as well as the timing and source of alkali-enrichment, clinopyroxene from ten samples erupted between 1329 and 2004 was targeted for <em>in situ</em> textural, major element and Sr isotope analysis. Clinopyroxene …
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Prelude to the Tshirege caldera-forming eruption of the Bandelier magmatic system, New Mexico, USA
… eruptions have occurred in the Bandelier magmatic system of the Jemez Mountains of northern New Mexico, the latter of which formed Valles caldera during the Tshirege eruption at 1232 ka. Despite no eruptions at Valles in the last ca. 70 kyr, the presence of partially molten magma bodies at …
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Petrogenetic Processes Characterizing the Mount Bachelor, Oregon Magmatic System: Open- versus Closed-System Processes
… with time, but a detailed assessment of magma chamber processes has not been conducted. To gain a more thorough understanding of the magmatic processes that have contributed to the observed compositional evolution, this study focuses on one of four eruptive episodes, specifically episode …
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The record of magma storage conditions in mineral compositions below a glacial to ice-free Askja volcano, Iceland
… and textures from basaltic lavas to reconstruct magma chamber conditions before, during and after glaciation. In this study, 36 lava flow and gabbro xenolith samples were collected from seven separate units: two glacial, the Early Holocene, and four historical. These samples were analyzed along …
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Documenting Mantle and Crustal Contributions to Flood Basalt Magmatism via Computational Modeling of the Steens Basalt, Southeast Oregon
… Results from the Energy-Constrained Recharge Assimilation Fractional Crystallization (EC-RAFC) computational modeling tool make predictions about the relative roles that magmatic processes (recharge, assimilation, and fraction crystallization) have in time (upsection), thus yielding …
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Quantifying Crustal Assimilation in Historical to Recent (1329-2005) Lavas at Mt. Etna, Italy: Insights from Thermodynamic Modeling
… of crustal contributions to post-1971 Etnean magmas via the Magma Chamber Simulator, on the basis of published and unpublished whole rock major oxides, trace elements, and <sup>87</sup>Sr/<sup>86</sup>Sr, and mineral compositional data. Over 200 models were run with varied pressures, initial …
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Water and fluorine contents in Mt. Hood magmas recorded by plagioclase phenocrysts
… is the most well-studied volatile component of magmas, but other volatiles species (e.g. F) are the subject of increasing interest (Dasgupta and Dixon 2009). Magmatic volatiles are often measured in melt inclusions (MIs) (e.g. Straub and Layne 2003; Plank et al. 2013), but may be uncommon in …