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Geosciences
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Magma Reservoir Dynamics
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Magma Reservoir Dynamics

A special issue of Geosciences (ISSN 2076-3263). This special issue belongs to the section "Geochemistry".

Deadline for manuscript submissions: closed (31 July 2020) | Viewed by 6140

Special Issue Editor

Dr. Chad D. Deering

E-Mail Website
Guest Editor
Department of Geological/Mining Engineering & Sciences, Michigan Technological University, Houghton, MI 49931, USA
Interests: petrology; geochemistry; mineralogy; magmatology; volcanology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Igneous processes on Earth produce low-density magmas that form continents, feed ore deposits, and lead to a wide variety of eruption styles of different magnitudes. A better understanding of the processes that lead to the generation and accumulation of magma bodies remains one of the grand challenges of the earth sciences and requires a multidisciplinary approach that integrates field work, geochemistry, geochronology, experimental petrology, geophysics, and numerical modeling on both volcanic and plutonic lithologies.

In this Special Collection, we propose to publish the results of work that include a diverse array of experimental, observational, and theoretical approaches, which will contribute to our understanding of magma reservoir dynamics.

Prof. Chad D. Deering
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Geosciences is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Geochemistry
  • Petrology
  • Geophysics
  • Numerical modeling
  • Geochronology
  • Experiments
  • Mineralogy

Published Papers (2 papers)

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Research

18 pages, 5614 KiB  
Article
Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013
by Sergei Abramenkov, Nikolaï M. Shapiro, Ivan Koulakov and Ilyas Abkadyrov
Geosciences 2020, 10(6), 230; https://doi.org/10.3390/geosciences10060230 - 14 Jun 2020
Cited by 5 | Viewed by 2758
Abstract
Gorely is one of the most active volcanoes in Kamchatka with a rich magmatic and eruptive history reflected in its composite structure. In 2013–2014, a temporary network of 20 seismic stations was installed on Gorely for one year. During the four months of [...] Read more.
Gorely is one of the most active volcanoes in Kamchatka with a rich magmatic and eruptive history reflected in its composite structure. In 2013–2014, a temporary network of 20 seismic stations was installed on Gorely for one year. During the four months of its high degassing rate, seismic activity was mostly expressed in the form of a long-period (LP) seismic tremor. In this study, we have developed a workflow based on the combination of back-projection (BP), cluster analysis, and matched-filter (MF) methods. By applying it to continuous seismic records for the study period, we were able to identify discrete LP events within the tremor sequence automatically and individually investigate their properties. A catalog obtained using the BP detection algorithm consist of 1741 high-energy events. Cluster analysis revealed that the entire variety of LP earthquakes in this catalog could be grouped into five families, which are sequentially organized in time. Utilizing templates of these families in the MF search resulted in the complementary catalog of 80,615 low-energy events. The long-term occurrence of highly repetitive LP events in the same location may correspond to resonating conduits behaving in response to the high-pressure gases flowing from the decompressed magma chamber up to the volcano’s crater. Full article
(This article belongs to the Special Issue Magma Reservoir Dynamics)
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18 pages, 10498 KiB  
Article
Magma Chambers and Meteoric Fluid Flows Beneath the Atka Volcanic Complex (Aleutian Islands) Inferred from Local Earthquake Tomography
by Ivan Koulakov, Ekaterina Boychenko and Sergey Z. Smirnov
Geosciences 2020, 10(6), 214; https://doi.org/10.3390/geosciences10060214 - 02 Jun 2020
Cited by 12 | Viewed by 3095
Abstract
Atka is a subduction-related volcanic island located in the central part of Aleutian Arc. The northeastern part of this island forms the Atka Volcanic Complex (AVC), which is built as a relict shield volcano of a circular shape overlain by several active and [...] Read more.
Atka is a subduction-related volcanic island located in the central part of Aleutian Arc. The northeastern part of this island forms the Atka Volcanic Complex (AVC), which is built as a relict shield volcano of a circular shape overlain by several active and extinct volcanic vents of different ages. During the past few decades, two active volcanoes within AVC—Korovin and Kliuchef—demonstrated mostly phreatic eruptions and intensive fumarolic activity. We have created the first tomographic model of the crust beneath AVC with the use of data of eight permanent stations of the Alaskan Volcanological Observatory operated in the time period from 2004 to 2017 that included arrival times of the P and S waves from local seismicity. Based on a series of checkerboard tests, we have demonstrated fair vertical and horizontal resolution of the model down to ~6 km depth. Beneath the Korovin and Kliuchef volcanoes, we have revealed two isolated anomalies of high Vp/Vs with values exceeding 2, which represent separate magma chambers that are responsible for magmatic eruptions of these two volcanoes. In shallow layers down to 2–3 km deep, we observe an alternation of zones with low and high values of the Vp/Vs ratio, which are likely associated with the circulation of meteoric fluids in the uppermost crust. Moderately high Vp/Vs anomalies indicate zones of meteoric water penetration down to the ground. On the other hand, the very low values of Vp/Vs reaching 1.5 depict the areas where meteoric water reached the hot magma reservoir and transformed into steam. On the surface, these zones coincide with the distributions of fumaroles. The outflow of these steam currents from active vents of Korovin and Kliuchef led to episodic phreatic eruptions, sometimes synchronous. Full article
(This article belongs to the Special Issue Magma Reservoir Dynamics)
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