Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.9/861 |
Resumo: | Dervent Heights are one of the least studied parts of the Strandja zone in Bulgaria. Our detailed field studies in the area of the villages of GoIiam and Valcha PoIiana show the need of revision of the earlier models for nappe tectonics in this pari of the Alpine orogenic belt. Two major units could be distinguished in the pre-Cenomanian basement - autochthon and allochthon. The autochthon is built by Variscan high-grade metamorphic rocks and not penetrativelly deformed granitoids. They are covered by low-grade Triassic metasediments. The allochthone consist of phyllite formation with early Paleozoic age, as well as the underlying carbonate and detrital metasediments. These metasediments form a mappable unit here designated as carbonate terrigeneous formation. Field data allow to reconsider the position of the abundant dolomites. It was suggested that they are forming the autochthon, but the field relations are consistent with interpreting them as a part of the carbonate-terigeneous formation. All studied rocks record very low-grade Early Alpine metamorphism (T<3OO-350'). The metasediments of the autochthon as well these of the allochthon display evidence for strong synmetamorphic deformations and because of that primary structures are not preserved. The timing of the emplacement of the allochthon is poorly constrained, but judging from the lack of localization of ductile as well as of brittle deformation along the major contacts it could be suggested that the emplacement was pre- to synmetamorphic. |
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Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE BulgariaTectónicaBulgáriaDervent Heights are one of the least studied parts of the Strandja zone in Bulgaria. Our detailed field studies in the area of the villages of GoIiam and Valcha PoIiana show the need of revision of the earlier models for nappe tectonics in this pari of the Alpine orogenic belt. Two major units could be distinguished in the pre-Cenomanian basement - autochthon and allochthon. The autochthon is built by Variscan high-grade metamorphic rocks and not penetrativelly deformed granitoids. They are covered by low-grade Triassic metasediments. The allochthone consist of phyllite formation with early Paleozoic age, as well as the underlying carbonate and detrital metasediments. These metasediments form a mappable unit here designated as carbonate terrigeneous formation. Field data allow to reconsider the position of the abundant dolomites. It was suggested that they are forming the autochthon, but the field relations are consistent with interpreting them as a part of the carbonate-terigeneous formation. All studied rocks record very low-grade Early Alpine metamorphism (T<3OO-350'). The metasediments of the autochthon as well these of the allochthon display evidence for strong synmetamorphic deformations and because of that primary structures are not preserved. The timing of the emplacement of the allochthon is poorly constrained, but judging from the lack of localization of ductile as well as of brittle deformation along the major contacts it could be suggested that the emplacement was pre- to synmetamorphic.Repositório do LNEGGerdjikov, IankoMetodiev, Daniel2010-07-09T15:23:46Z2005-01-01T00:00:00Z2005-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/861engGerdjikov, Ianko; Metodiev, Daniel - Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria. In: Annual of the University of Mining and Geology "St. Ivan Rilski" : Geology and Geophysics, Vol. 48, Part I, 2005, p. 41-46info: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:RCAAP2022-09-06T12:25:09Zoai:repositorio.lneg.pt:10400.9/861Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:33:42.541766Repositório 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 |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria |
title |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria |
spellingShingle |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria Gerdjikov, Ianko Tectónica Bulgária |
title_short |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria |
title_full |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria |
title_fullStr |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria |
title_full_unstemmed |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria |
title_sort |
Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria |
author |
Gerdjikov, Ianko |
author_facet |
Gerdjikov, Ianko Metodiev, Daniel |
author_role |
author |
author2 |
Metodiev, Daniel |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Gerdjikov, Ianko Metodiev, Daniel |
dc.subject.por.fl_str_mv |
Tectónica Bulgária |
topic |
Tectónica Bulgária |
description |
Dervent Heights are one of the least studied parts of the Strandja zone in Bulgaria. Our detailed field studies in the area of the villages of GoIiam and Valcha PoIiana show the need of revision of the earlier models for nappe tectonics in this pari of the Alpine orogenic belt. Two major units could be distinguished in the pre-Cenomanian basement - autochthon and allochthon. The autochthon is built by Variscan high-grade metamorphic rocks and not penetrativelly deformed granitoids. They are covered by low-grade Triassic metasediments. The allochthone consist of phyllite formation with early Paleozoic age, as well as the underlying carbonate and detrital metasediments. These metasediments form a mappable unit here designated as carbonate terrigeneous formation. Field data allow to reconsider the position of the abundant dolomites. It was suggested that they are forming the autochthon, but the field relations are consistent with interpreting them as a part of the carbonate-terigeneous formation. All studied rocks record very low-grade Early Alpine metamorphism (T<3OO-350'). The metasediments of the autochthon as well these of the allochthon display evidence for strong synmetamorphic deformations and because of that primary structures are not preserved. The timing of the emplacement of the allochthon is poorly constrained, but judging from the lack of localization of ductile as well as of brittle deformation along the major contacts it could be suggested that the emplacement was pre- to synmetamorphic. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-01-01T00:00:00Z 2005-01-01T00:00:00Z 2010-07-09T15:23:46Z |
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/10400.9/861 |
url |
http://hdl.handle.net/10400.9/861 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Gerdjikov, Ianko; Metodiev, Daniel - Thrust tectonics in the Strandja zone : new data from the Dervent Heights, SE Bulgaria. In: Annual of the University of Mining and Geology "St. Ivan Rilski" : Geology and Geophysics, Vol. 48, Part I, 2005, p. 41-46 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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 |
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