Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments

Detalhes bibliográficos
Autor(a) principal: Nakamura, Kazuaki
Data de Publicação: 1982
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.3/4918
Resumo: International Symposium on the Activity of Oceanic Volcanoes. Ponta Delgada, 4-9 August 1980.
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spelling Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sedimentsHawaiian VolcanoesVolcanismInternational Symposium on the Activity of Oceanic Volcanoes. Ponta Delgada, 4-9 August 1980.Rift zones are one of the characteristic features of Hawaiian volcanoes. They are long narrow zones of flank fissure eruptions but are distinct from ordinary flank eruption sites on po1ygenetic volcanoes in that eruptions, and therefore dike intrusions, occur repeatedly at the same general place for a long time and thus cause a considerable distance of horizontal spreading. This spreading should somehow be accommodated and the direction of the minimum compressive stress should remain the same after accommodation in order for a new dike to intrude in the same orientation. The Krafla spreading events in Iceland between North American and European plates revealed that the process of the lithospheric spreading is similar to that observed for Hawaiian volcanic activities, including rift zone eruptions. Accreting plate boundaries may be understood as consisting of chain of linear rift zones and their source polygenetic centers where the magma supplied from the asthenosphere is temporarily .stored. Horizontal spreading caused by repeated dike intrusions has been accommodated in the case of the accreting plate boundaries by the lateral separation of lithosphere over astenosphere. In the case of Hawaii sliding of the volcanic edifice over deep sea sediments may be the analogous mechanism such as appears to have occurred during the 1975 Kalapana earthquake which was anticipated by SWANSON et al. (1976) as one of the repeated events as the east rift zone has continuously dilated. Lack of rift zones in otherwise similar Galapagos shields which sit over the young ocean floor with higher relief is consistent with this view.Universidade dos AçoresRepositório da Universidade dos AçoresNakamura, Kazuaki2018-12-03T13:44:38Z1982-071982-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.3/4918engNakamura, Kazuaki (1982). Why do long rift zones develop better in Hawaiian volcanoes: a possible role of thick oceanic sediments. "Arquipélago. Série Ciências da Natureza", 3: 59-73.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-12-20T14:33:10Zoai:repositorio.uac.pt:10400.3/4918Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:27:14.427396Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
title Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
spellingShingle Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
Nakamura, Kazuaki
Hawaiian Volcanoes
Volcanism
title_short Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
title_full Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
title_fullStr Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
title_full_unstemmed Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
title_sort Why do long rift zones develop better in Hawaiian volcanoes : a possible role of thick oceanic sediments
author Nakamura, Kazuaki
author_facet Nakamura, Kazuaki
author_role author
dc.contributor.none.fl_str_mv Repositório da Universidade dos Açores
dc.contributor.author.fl_str_mv Nakamura, Kazuaki
dc.subject.por.fl_str_mv Hawaiian Volcanoes
Volcanism
topic Hawaiian Volcanoes
Volcanism
description International Symposium on the Activity of Oceanic Volcanoes. Ponta Delgada, 4-9 August 1980.
publishDate 1982
dc.date.none.fl_str_mv 1982-07
1982-07-01T00:00:00Z
2018-12-03T13:44:38Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.3/4918
url http://hdl.handle.net/10400.3/4918
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Nakamura, Kazuaki (1982). Why do long rift zones develop better in Hawaiian volcanoes: a possible role of thick oceanic sediments. "Arquipélago. Série Ciências da Natureza", 3: 59-73.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Universidade dos Açores
publisher.none.fl_str_mv Universidade dos Açores
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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