Sustaining volcanism in central Kamchatka
Flux-induced melting in the mantle wedge acts as the driving mechanism of arc volcanism in subduction zone environments. The primary control on the geographical position of arc volcanic centers is the depth of the subducting plate beneath the overriding plate. Globally, the average depth to the subd...
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ftdatacite:10.7282/t33b5z6n 2023-05-15T16:58:32+02:00 Sustaining volcanism in central Kamchatka Nikulin, Alex 2011 https://dx.doi.org/10.7282/t33b5z6n https://rucore.libraries.rutgers.edu/rutgers-lib/36174/ unknown No Publisher Supplied Text article-journal ScholarlyArticle 2011 ftdatacite https://doi.org/10.7282/t33b5z6n 2021-11-05T12:55:41Z Flux-induced melting in the mantle wedge acts as the driving mechanism of arc volcanism in subduction zone environments. The primary control on the geographical position of arc volcanic centers is the depth of the subducting plate beneath the overriding plate. Globally, the average depth to the subducting plate beneath volcanic arcs is estimated at ~100km. Volcanoes of the Central Kamchatka Depression in Eastern Russia comprise the most active volcanic arc system in the world with the depth of the subducting Pacific plate beneath the arc estimated at 180-200km, greatly in excess of the global average. In my research I attempt to describe the special tectonic circumstances that explain the deviation of the subduction depth constraint on arc volcanism in Central Kamchatka. In my study I rely on geophysical and geochemical data and petrological modeling to propose a new geodynamic model to explain voluminous volcanic activity in Central Kamchatka. In the initial stage of the study I conducted a geophysical investigation using receiver function methodology to map and describe the contact of the subducting Juan de Fuca Plate in the well-instrumented Cascadia subduction zone. I calculated and compiled a database of receiver function profiles from stations along the extent of the Cascadia forearc and mapped a low velocity anisotropic zone proposed to be serpentinized material along the forearc axis. In the second stage of my study I applied a similar methodology to describe the sub-crustal structure of Central Kamchatka. Results of this effort suggested presence of a low-velocity zone in the upper mantle separate from the subducting Pacific plate. I proceeded to investigate the tectonic origin of this feature in the final stage of my dissertation work with the use of receiver function migration, geochemical analysis and petrological modeling. I was able to further constrain the position of the low velocity anomaly and derive geochemical and petrological evidence linking the anomaly to a second source of melting driving volcanism of the Central Kamchatka arc. Text Kamchatka DataCite Metadata Store (German National Library of Science and Technology) Pacific |
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Flux-induced melting in the mantle wedge acts as the driving mechanism of arc volcanism in subduction zone environments. The primary control on the geographical position of arc volcanic centers is the depth of the subducting plate beneath the overriding plate. Globally, the average depth to the subducting plate beneath volcanic arcs is estimated at ~100km. Volcanoes of the Central Kamchatka Depression in Eastern Russia comprise the most active volcanic arc system in the world with the depth of the subducting Pacific plate beneath the arc estimated at 180-200km, greatly in excess of the global average. In my research I attempt to describe the special tectonic circumstances that explain the deviation of the subduction depth constraint on arc volcanism in Central Kamchatka. In my study I rely on geophysical and geochemical data and petrological modeling to propose a new geodynamic model to explain voluminous volcanic activity in Central Kamchatka. In the initial stage of the study I conducted a geophysical investigation using receiver function methodology to map and describe the contact of the subducting Juan de Fuca Plate in the well-instrumented Cascadia subduction zone. I calculated and compiled a database of receiver function profiles from stations along the extent of the Cascadia forearc and mapped a low velocity anisotropic zone proposed to be serpentinized material along the forearc axis. In the second stage of my study I applied a similar methodology to describe the sub-crustal structure of Central Kamchatka. Results of this effort suggested presence of a low-velocity zone in the upper mantle separate from the subducting Pacific plate. I proceeded to investigate the tectonic origin of this feature in the final stage of my dissertation work with the use of receiver function migration, geochemical analysis and petrological modeling. I was able to further constrain the position of the low velocity anomaly and derive geochemical and petrological evidence linking the anomaly to a second source of melting driving volcanism of the Central Kamchatka arc. |
format |
Text |
author |
Nikulin, Alex |
spellingShingle |
Nikulin, Alex Sustaining volcanism in central Kamchatka |
author_facet |
Nikulin, Alex |
author_sort |
Nikulin, Alex |
title |
Sustaining volcanism in central Kamchatka |
title_short |
Sustaining volcanism in central Kamchatka |
title_full |
Sustaining volcanism in central Kamchatka |
title_fullStr |
Sustaining volcanism in central Kamchatka |
title_full_unstemmed |
Sustaining volcanism in central Kamchatka |
title_sort |
sustaining volcanism in central kamchatka |
publisher |
No Publisher Supplied |
publishDate |
2011 |
url |
https://dx.doi.org/10.7282/t33b5z6n https://rucore.libraries.rutgers.edu/rutgers-lib/36174/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_doi |
https://doi.org/10.7282/t33b5z6n |
_version_ |
1766050569180413952 |