Magma mixing and hybridism : a preliminary study from southern Iceland

Detalhes bibliográficos
Autor(a) principal: JØRGENSEN, Karl A.
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/10400.3/4902
Resumo: International Symposium on the Activity of Oceanic Volcanoes. Ponta Delgada, 4-9 August 1980.
id RCAP_9c36eb1926f8c42e53db4f0505e408eb
oai_identifier_str oai:repositorio.uac.pt:10400.3/4902
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Magma mixing and hybridism : a preliminary study from southern IcelandGeochemistryVolcanic SoilsIcelandInternational Symposium on the Activity of Oceanic Volcanoes. Ponta Delgada, 4-9 August 1980.The importance of magma-mixing in the generation of intermediate rock types is discussed in the light of two occurrences of mixed rocks found in the Tindfjallajökull silicic centre, S.-Iceland. The first being a minor mafic part of the large Thorsmörk ignimbrite (Jørgensen, 1980), demonstrates the formation of non-linearly derived hybrids through differential interdiffusion of elements, in connection with resorption/crystallization of phenocryst phases, demonstrated by the occurrence of abundant xenocrysts of feldspar and pyroxene and new crystallization of pyroxene and magnetite in the hybrids. The second occurrence is a mafic lava of benmoreitic composition, containing xenocrysts of acid and basic feldspars and pyroxenes in addition to unresorbed phases in equilibrium with the melt. Several other rocks show disequilibrium features which may indicate mixing of two contrasting magma types, though other rock types contain phases which may be remnants from partial melting of crustal material, as well as of fractional crystallization.Universidade dos AçoresRepositório da Universidade dos AçoresJØRGENSEN, Karl A.2018-11-29T11:11:15Z1982-071982-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.3/4902engJØRGENSEN, Karl A. (1982). Magma mixing and hybridism: a preliminary study from southern Iceland. "Arquipélago. Série Ciências da Natureza", 3: 179-194.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:RCAAP2022-12-20T14:33:09Zoai:repositorio.uac.pt:10400.3/4902Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:27:13.632120Repositório 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 Magma mixing and hybridism : a preliminary study from southern Iceland
title Magma mixing and hybridism : a preliminary study from southern Iceland
spellingShingle Magma mixing and hybridism : a preliminary study from southern Iceland
JØRGENSEN, Karl A.
Geochemistry
Volcanic Soils
Iceland
title_short Magma mixing and hybridism : a preliminary study from southern Iceland
title_full Magma mixing and hybridism : a preliminary study from southern Iceland
title_fullStr Magma mixing and hybridism : a preliminary study from southern Iceland
title_full_unstemmed Magma mixing and hybridism : a preliminary study from southern Iceland
title_sort Magma mixing and hybridism : a preliminary study from southern Iceland
author JØRGENSEN, Karl A.
author_facet JØRGENSEN, Karl A.
author_role author
dc.contributor.none.fl_str_mv Repositório da Universidade dos Açores
dc.contributor.author.fl_str_mv JØRGENSEN, Karl A.
dc.subject.por.fl_str_mv Geochemistry
Volcanic Soils
Iceland
topic Geochemistry
Volcanic Soils
Iceland
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
2018-11-29T11:11:15Z
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/10400.3/4902
url http://hdl.handle.net/10400.3/4902
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv JØRGENSEN, Karl A. (1982). Magma mixing and hybridism: a preliminary study from southern Iceland. "Arquipélago. Série Ciências da Natureza", 3: 179-194.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799130727208452096

Registros relacionados