Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography
Gorely is an active volcano located 75 km from Petropavlovsk-Kamchatsky, Kamchatka. In 2010–2015, it exhibited strong activity expressed by anomalously high gas emission. In 2013–2014, we deployed a temporary network consisting of 20 temporary seismic stations that operated for one year. We selected...
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ftmdpi:oai:mdpi.com:/2076-3263/7/4/111/ 2023-08-20T04:07:40+02:00 Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography Pavel Kuznetsov Ivan Koulakov Andrey Jakovlev Ilyas Abkadyrov Evgeny Deev Evgeny Gordeev Sergey Senyukov Sami El Khrepy Nassir Al Arifi agris 2017-11-01 application/pdf https://doi.org/10.3390/geosciences7040111 EN eng Multidisciplinary Digital Publishing Institute Natural Hazards https://dx.doi.org/10.3390/geosciences7040111 https://creativecommons.org/licenses/by/4.0/ Geosciences; Volume 7; Issue 4; Pages: 111 Gorely volcano travel-time tomography gas contamination magma reservoir degassing Text 2017 ftmdpi https://doi.org/10.3390/geosciences7040111 2023-07-31T21:16:12Z Gorely is an active volcano located 75 km from Petropavlovsk-Kamchatsky, Kamchatka. In 2010–2015, it exhibited strong activity expressed by anomalously high gas emission. In 2013–2014, we deployed a temporary network consisting of 20 temporary seismic stations that operated for one year. We selected 333 events with 1613 P-wave and 2421 S-wave arrival times to build the first tomographic model of this volcano. The seismic model was carefully verified using a series of synthetic tests. Our tomographic model provides a mechanism for volatile feeding of Gorely. An unexpected feature of the model was low Vp/Vs ratios; below 1.4 in some parts. One reason for such low Vp/Vs ratios is gas contamination due to magma degassing. In the central part of the model, directly underneath the Gorely crater, we observe a 2.5 km wide and 1.5 km thick seismic anomaly with a very high Vp/Vs ratio of up to 2. This may represent a magma reservoir with a high melt and/or volatile content. The upper limit of this anomaly, 2.5 km below the surface, may indicate the degassing level, which coincides with the most intense seismicity. Below this reservoir, we observe another columnar high Vp/Vs ratio anomaly. This can be interpreted as a conduit bringing magma and fluids from deeper sources. Text Kamchatka MDPI Open Access Publishing Petropavlovsk ENVELOPE(158.626,158.626,53.067,53.067) Petropavlovsk-Kamchatsky ENVELOPE(158.651,158.651,53.044,53.044) Geosciences 7 4 111 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Gorely volcano travel-time tomography gas contamination magma reservoir degassing |
spellingShingle |
Gorely volcano travel-time tomography gas contamination magma reservoir degassing Pavel Kuznetsov Ivan Koulakov Andrey Jakovlev Ilyas Abkadyrov Evgeny Deev Evgeny Gordeev Sergey Senyukov Sami El Khrepy Nassir Al Arifi Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography |
topic_facet |
Gorely volcano travel-time tomography gas contamination magma reservoir degassing |
description |
Gorely is an active volcano located 75 km from Petropavlovsk-Kamchatsky, Kamchatka. In 2010–2015, it exhibited strong activity expressed by anomalously high gas emission. In 2013–2014, we deployed a temporary network consisting of 20 temporary seismic stations that operated for one year. We selected 333 events with 1613 P-wave and 2421 S-wave arrival times to build the first tomographic model of this volcano. The seismic model was carefully verified using a series of synthetic tests. Our tomographic model provides a mechanism for volatile feeding of Gorely. An unexpected feature of the model was low Vp/Vs ratios; below 1.4 in some parts. One reason for such low Vp/Vs ratios is gas contamination due to magma degassing. In the central part of the model, directly underneath the Gorely crater, we observe a 2.5 km wide and 1.5 km thick seismic anomaly with a very high Vp/Vs ratio of up to 2. This may represent a magma reservoir with a high melt and/or volatile content. The upper limit of this anomaly, 2.5 km below the surface, may indicate the degassing level, which coincides with the most intense seismicity. Below this reservoir, we observe another columnar high Vp/Vs ratio anomaly. This can be interpreted as a conduit bringing magma and fluids from deeper sources. |
format |
Text |
author |
Pavel Kuznetsov Ivan Koulakov Andrey Jakovlev Ilyas Abkadyrov Evgeny Deev Evgeny Gordeev Sergey Senyukov Sami El Khrepy Nassir Al Arifi |
author_facet |
Pavel Kuznetsov Ivan Koulakov Andrey Jakovlev Ilyas Abkadyrov Evgeny Deev Evgeny Gordeev Sergey Senyukov Sami El Khrepy Nassir Al Arifi |
author_sort |
Pavel Kuznetsov |
title |
Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography |
title_short |
Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography |
title_full |
Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography |
title_fullStr |
Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography |
title_full_unstemmed |
Structure of Volatile Conduits beneath Gorely Volcano (Kamchatka) Revealed by Local Earthquake Tomography |
title_sort |
structure of volatile conduits beneath gorely volcano (kamchatka) revealed by local earthquake tomography |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2017 |
url |
https://doi.org/10.3390/geosciences7040111 |
op_coverage |
agris |
long_lat |
ENVELOPE(158.626,158.626,53.067,53.067) ENVELOPE(158.651,158.651,53.044,53.044) |
geographic |
Petropavlovsk Petropavlovsk-Kamchatsky |
geographic_facet |
Petropavlovsk Petropavlovsk-Kamchatsky |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Geosciences; Volume 7; Issue 4; Pages: 111 |
op_relation |
Natural Hazards https://dx.doi.org/10.3390/geosciences7040111 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/geosciences7040111 |
container_title |
Geosciences |
container_volume |
7 |
container_issue |
4 |
container_start_page |
111 |
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1774719465882124288 |