Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka
Kamchatsky Bay is the northernmost bay at the Pacific Kamchatka coast. It is located at the junction between the Kamchatka segment of the Pacific subduction zone and the dextral transform fault of the western Aleutians. The combination of the subduction and collision processes in this region results...
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ftoceanrep:oai:oceanrep.geomar.de:28471 2024-01-28T10:06:54+01:00 Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka Pinegina, T. K. Kozhurin, A. I. Ponomareva, Vera V. 2014 text https://oceanrep.geomar.de/id/eprint/28471/ https://oceanrep.geomar.de/id/eprint/28471/1/2014_Pinegina-etal_RJPacGeol-8.pdf https://doi.org/10.1134/S1819714014010047 en eng MAIK Nauka/Interperiodica Springer https://oceanrep.geomar.de/id/eprint/28471/1/2014_Pinegina-etal_RJPacGeol-8.pdf Pinegina, T. K., Kozhurin, A. I. and Ponomareva, V. V. (2014) Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka. Open Access Russian Journal of Pacific Geology, 8 (1). pp. 65-76. DOI 10.1134/S1819714014010047 <https://doi.org/10.1134/S1819714014010047>. doi:10.1134/S1819714014010047 cc_by_nc_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1134/S1819714014010047 2024-01-01T00:22:33Z Kamchatsky Bay is the northernmost bay at the Pacific Kamchatka coast. It is located at the junction between the Kamchatka segment of the Pacific subduction zone and the dextral transform fault of the western Aleutians. The combination of the subduction and collision processes in this region results in the unique set of tectonic controls influencing its geological and geomorphological evolution. The Kamchatka River estuarine area is located on the northern coast of Kamchatsky Bay. The modern Kamchatka River valley, its estuary, and an aggradation marine terrace some 30 km long and up to 5 km wide were formed in this area during the Holocene. A vast area in the rear part of the terrace and in the Stolbovskaya lowlands is now occupied by the peats deposited directly above lacustrine-lagoonal and fluvial facies. These aggradational landforms record traces of tsunamis and vertical coseismic deformations associated with great subduction earthquakes, as well as strike-slip and thrust faulting associated with the collision. The results indicate that the average recurrence interval for major tsunamis in the Kamchatsky Bay is 300 years. The recurrence interval on individual fault zones associated with the collision between the western Aleutian and Kamchatka arcs is a few thousand years for earthquakes of magnitude between 7 and 7.5. For the entire region, the recurrence interval for major crustal earthquakes associated with motions along faults may be equal to a few hundred years, which is comparable with that for subduction-zone earthquakes. Article in Journal/Newspaper Kamchatka OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Pacific Russian Journal of Pacific Geology 8 1 65 76 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Kamchatsky Bay is the northernmost bay at the Pacific Kamchatka coast. It is located at the junction between the Kamchatka segment of the Pacific subduction zone and the dextral transform fault of the western Aleutians. The combination of the subduction and collision processes in this region results in the unique set of tectonic controls influencing its geological and geomorphological evolution. The Kamchatka River estuarine area is located on the northern coast of Kamchatsky Bay. The modern Kamchatka River valley, its estuary, and an aggradation marine terrace some 30 km long and up to 5 km wide were formed in this area during the Holocene. A vast area in the rear part of the terrace and in the Stolbovskaya lowlands is now occupied by the peats deposited directly above lacustrine-lagoonal and fluvial facies. These aggradational landforms record traces of tsunamis and vertical coseismic deformations associated with great subduction earthquakes, as well as strike-slip and thrust faulting associated with the collision. The results indicate that the average recurrence interval for major tsunamis in the Kamchatsky Bay is 300 years. The recurrence interval on individual fault zones associated with the collision between the western Aleutian and Kamchatka arcs is a few thousand years for earthquakes of magnitude between 7 and 7.5. For the entire region, the recurrence interval for major crustal earthquakes associated with motions along faults may be equal to a few hundred years, which is comparable with that for subduction-zone earthquakes. |
format |
Article in Journal/Newspaper |
author |
Pinegina, T. K. Kozhurin, A. I. Ponomareva, Vera V. |
spellingShingle |
Pinegina, T. K. Kozhurin, A. I. Ponomareva, Vera V. Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka |
author_facet |
Pinegina, T. K. Kozhurin, A. I. Ponomareva, Vera V. |
author_sort |
Pinegina, T. K. |
title |
Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka |
title_short |
Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka |
title_full |
Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka |
title_fullStr |
Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka |
title_full_unstemmed |
Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka |
title_sort |
active tectonics and geomorphology of the kamchatsky bay coast in kamchatka |
publisher |
MAIK Nauka/Interperiodica |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/28471/ https://oceanrep.geomar.de/id/eprint/28471/1/2014_Pinegina-etal_RJPacGeol-8.pdf https://doi.org/10.1134/S1819714014010047 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
https://oceanrep.geomar.de/id/eprint/28471/1/2014_Pinegina-etal_RJPacGeol-8.pdf Pinegina, T. K., Kozhurin, A. I. and Ponomareva, V. V. (2014) Active tectonics and geomorphology of the Kamchatsky Bay coast in Kamchatka. Open Access Russian Journal of Pacific Geology, 8 (1). pp. 65-76. DOI 10.1134/S1819714014010047 <https://doi.org/10.1134/S1819714014010047>. doi:10.1134/S1819714014010047 |
op_rights |
cc_by_nc_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1134/S1819714014010047 |
container_title |
Russian Journal of Pacific Geology |
container_volume |
8 |
container_issue |
1 |
container_start_page |
65 |
op_container_end_page |
76 |
_version_ |
1789334145352073216 |