Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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/10773/37462 |
Resumo: | The Pirabas Formation (early to middle Miocene) from the equatorial margin of North Brazil is characterized by a shallow-marine carbonate platform with high fossil diversity and abundant micro- and macrofossil remains. The Pirabas Formation represents a unique carbonate system along the Atlantic margin of South America that developed before the onset of the Amazon delta. We studied the palaeontology and lithofacies of outcrops of the uppermost Pirabas Formation and found that was deposited in a coastal marine environment with marginal lagoons under the influence of a tidal regime and tropical storms. The remains of calcareous algae, molluscs, crustaceans, echinoiderms, bryozoans, solitary corals, fish and marine mammals, together with foraminifera, ostracods and other marine microfossils, shaped a biogenic framework, that together with the post-depositional processes of dissolution of skeletal grains, is responsible for the mean packstone-floatstone porosity of 14.9%. The palaeontological framework and the petrophysical characterization of the carbonate rocks from the uppermost Pirabas Formation outcrop represent a baseline to interpret the entire Pirabas Formation in the subsurface stratigraphic sections (cores) of this important Neogene unit. Considering that carbonate rocks account for ~50% of oil and gas reservoirs around the world, this research provides a model for Neogene tropical carbonate deposits useful for carbonate petroliferous reservoirs in the Brazilian equatorial basins. |
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Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platformMarine fossilWestern atlanticMioceneCarbonate platformMicro CTThe Pirabas Formation (early to middle Miocene) from the equatorial margin of North Brazil is characterized by a shallow-marine carbonate platform with high fossil diversity and abundant micro- and macrofossil remains. The Pirabas Formation represents a unique carbonate system along the Atlantic margin of South America that developed before the onset of the Amazon delta. We studied the palaeontology and lithofacies of outcrops of the uppermost Pirabas Formation and found that was deposited in a coastal marine environment with marginal lagoons under the influence of a tidal regime and tropical storms. The remains of calcareous algae, molluscs, crustaceans, echinoiderms, bryozoans, solitary corals, fish and marine mammals, together with foraminifera, ostracods and other marine microfossils, shaped a biogenic framework, that together with the post-depositional processes of dissolution of skeletal grains, is responsible for the mean packstone-floatstone porosity of 14.9%. The palaeontological framework and the petrophysical characterization of the carbonate rocks from the uppermost Pirabas Formation outcrop represent a baseline to interpret the entire Pirabas Formation in the subsurface stratigraphic sections (cores) of this important Neogene unit. Considering that carbonate rocks account for ~50% of oil and gas reservoirs around the world, this research provides a model for Neogene tropical carbonate deposits useful for carbonate petroliferous reservoirs in the Brazilian equatorial basins.Elsevier2023-04-28T15:32:38Z2020-01-01T00:00:00Z2020-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/37462eng0377-839810.1016/j.marmicro.2019.101813Aguilera, OrangelOliveira de Araújo, Olga M.Hendy, AustinNogueira, Anna A.E.Nogueira, Afonso C.R.Maurity, Clovis WagnerKutter, Vinicius TavaresMartins, Maria Virgínia AlvesColetti, GiovanniDias, Bruna Borbada Silva-Caminha, Silane A.F.Jaramillo, CarlosBencomo, KarenLopes, Ricardo Tadeuinfo: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:RCAAP2024-02-22T12:12:22Zoai:ria.ua.pt:10773/37462Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:08:04.444348Repositório 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 |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform |
title |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform |
spellingShingle |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform Aguilera, Orangel Marine fossil Western atlantic Miocene Carbonate platform Micro CT |
title_short |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform |
title_full |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform |
title_fullStr |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform |
title_full_unstemmed |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform |
title_sort |
Palaeontological framework from Pirabas Formation (North Brazil) used as potential model for equatorial carbonate platform |
author |
Aguilera, Orangel |
author_facet |
Aguilera, Orangel Oliveira de Araújo, Olga M. Hendy, Austin Nogueira, Anna A.E. Nogueira, Afonso C.R. Maurity, Clovis Wagner Kutter, Vinicius Tavares Martins, Maria Virgínia Alves Coletti, Giovanni Dias, Bruna Borba da Silva-Caminha, Silane A.F. Jaramillo, Carlos Bencomo, Karen Lopes, Ricardo Tadeu |
author_role |
author |
author2 |
Oliveira de Araújo, Olga M. Hendy, Austin Nogueira, Anna A.E. Nogueira, Afonso C.R. Maurity, Clovis Wagner Kutter, Vinicius Tavares Martins, Maria Virgínia Alves Coletti, Giovanni Dias, Bruna Borba da Silva-Caminha, Silane A.F. Jaramillo, Carlos Bencomo, Karen Lopes, Ricardo Tadeu |
author2_role |
author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Aguilera, Orangel Oliveira de Araújo, Olga M. Hendy, Austin Nogueira, Anna A.E. Nogueira, Afonso C.R. Maurity, Clovis Wagner Kutter, Vinicius Tavares Martins, Maria Virgínia Alves Coletti, Giovanni Dias, Bruna Borba da Silva-Caminha, Silane A.F. Jaramillo, Carlos Bencomo, Karen Lopes, Ricardo Tadeu |
dc.subject.por.fl_str_mv |
Marine fossil Western atlantic Miocene Carbonate platform Micro CT |
topic |
Marine fossil Western atlantic Miocene Carbonate platform Micro CT |
description |
The Pirabas Formation (early to middle Miocene) from the equatorial margin of North Brazil is characterized by a shallow-marine carbonate platform with high fossil diversity and abundant micro- and macrofossil remains. The Pirabas Formation represents a unique carbonate system along the Atlantic margin of South America that developed before the onset of the Amazon delta. We studied the palaeontology and lithofacies of outcrops of the uppermost Pirabas Formation and found that was deposited in a coastal marine environment with marginal lagoons under the influence of a tidal regime and tropical storms. The remains of calcareous algae, molluscs, crustaceans, echinoiderms, bryozoans, solitary corals, fish and marine mammals, together with foraminifera, ostracods and other marine microfossils, shaped a biogenic framework, that together with the post-depositional processes of dissolution of skeletal grains, is responsible for the mean packstone-floatstone porosity of 14.9%. The palaeontological framework and the petrophysical characterization of the carbonate rocks from the uppermost Pirabas Formation outcrop represent a baseline to interpret the entire Pirabas Formation in the subsurface stratigraphic sections (cores) of this important Neogene unit. Considering that carbonate rocks account for ~50% of oil and gas reservoirs around the world, this research provides a model for Neogene tropical carbonate deposits useful for carbonate petroliferous reservoirs in the Brazilian equatorial basins. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01T00:00:00Z 2020-01 2023-04-28T15:32:38Z |
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/10773/37462 |
url |
http://hdl.handle.net/10773/37462 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0377-8398 10.1016/j.marmicro.2019.101813 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
instacron_str |
RCAAP |
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RCAAP |
reponame_str |
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 |
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1799137734462275584 |