Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms?
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jsames.2017.04.007 http://hdl.handle.net/11449/162968 |
Resumo: | This is the first record of a Permian seep deposit and an associated, morphologically bizarre, bivalve-dominated fauna from the Passa Dois Group, Parana Basin, Brazil. Shales of the outer-shelf facies of the Serra Alta Formation preserve a low-diversity but high-abundant, large-sized bivalve fauna with unusual morphologies inside discoidal carbonate concretions. The bivalves are about ten times larger than tiny bivalves found scattered in laterally equivalent mudstones of the same unit. Intercalated between two concretion-bearing horizons, a cm-thick, sheet-like, disrupted, brecciated, partially silicified carbonate layer with microbially-induced lamination is recorded. In some areas, the carbonate layer shows vertical structures formed by injections of mud mixed with white limestone clasts and microbial linings. Immediately above this, silicified mudstones preserve small domal structures (= mounds) with a slightly depressed center. Monospecific concentrations of closed articulated shells of Tambaquyra camargoi occur at the base of these domes. Carbon-isotope (delta C-13) values from the shells, brecciated carbonates, and fossil-rich concretions are all depleted (negative values similar to -6.1 to -7.6 parts per thousand). Combined taphonomic, sedimentological, petrographic, geochemical and paleontological data suggest that the disrupted, brecciated carbonate and associated fauna and domes may have formed by an exudation system. Indeed, this interval of the Serra Alta Formation is similar to 8.7 m above the contact with the underlying, oil-rich Irati Formation. This unit has very high total organic carbon (up to 23%) values and high sulphur contents, supporting the interpretation of the lithological and paleontological features as result of seepage of organic compounds at the seafloor. Where the gases and hydrocarbons escaped, the seabed was colonized by, at least facultatively, chemosymbiotic bivalves. The species above belong to a highly endemic group of pachydomids that were shallow infaunal bivalves (SIB). Hence, they are not related to classical bivalves with extant representatives, which are chemosymbionts. This may reflect an extreme adaptive radiation and repopulation of anoxic-dysoxic bottoms of the Parana Basin by SIB species. (C) 2017 Elsevier Ltd. All rights reserved. |
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Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms?PermianSerra Alta FormationSeep faunaChemosymbiotic bivalvesIntraplate basinThis is the first record of a Permian seep deposit and an associated, morphologically bizarre, bivalve-dominated fauna from the Passa Dois Group, Parana Basin, Brazil. Shales of the outer-shelf facies of the Serra Alta Formation preserve a low-diversity but high-abundant, large-sized bivalve fauna with unusual morphologies inside discoidal carbonate concretions. The bivalves are about ten times larger than tiny bivalves found scattered in laterally equivalent mudstones of the same unit. Intercalated between two concretion-bearing horizons, a cm-thick, sheet-like, disrupted, brecciated, partially silicified carbonate layer with microbially-induced lamination is recorded. In some areas, the carbonate layer shows vertical structures formed by injections of mud mixed with white limestone clasts and microbial linings. Immediately above this, silicified mudstones preserve small domal structures (= mounds) with a slightly depressed center. Monospecific concentrations of closed articulated shells of Tambaquyra camargoi occur at the base of these domes. Carbon-isotope (delta C-13) values from the shells, brecciated carbonates, and fossil-rich concretions are all depleted (negative values similar to -6.1 to -7.6 parts per thousand). Combined taphonomic, sedimentological, petrographic, geochemical and paleontological data suggest that the disrupted, brecciated carbonate and associated fauna and domes may have formed by an exudation system. Indeed, this interval of the Serra Alta Formation is similar to 8.7 m above the contact with the underlying, oil-rich Irati Formation. This unit has very high total organic carbon (up to 23%) values and high sulphur contents, supporting the interpretation of the lithological and paleontological features as result of seepage of organic compounds at the seafloor. Where the gases and hydrocarbons escaped, the seabed was colonized by, at least facultatively, chemosymbiotic bivalves. The species above belong to a highly endemic group of pachydomids that were shallow infaunal bivalves (SIB). Hence, they are not related to classical bivalves with extant representatives, which are chemosymbionts. This may reflect an extreme adaptive radiation and repopulation of anoxic-dysoxic bottoms of the Parana Basin by SIB species. (C) 2017 Elsevier Ltd. All rights reserved.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Inst Biociencias, Dept Zool, BR-18618970 Botucatu, SP, BrazilUniv Sao Paulo, Inst Geociencias, BR-05508080 Sao Paulo, BrazilUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Campus Rio Claro, BR-13506900 Rio Claro, SP, BrazilFriedrich August Univ Erlangen Nurnberg, FG Palaoumwelt, GeoZentrum Nordbayern, Loewenichstr, D-91054 Erlangen, GermanyUniv Sao Paulo, Inst Energia & Ambiente, Sao Paulo, SP, BrazilUniv Sao Paulo, Inst Geociencias, Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-18618970 Botucatu, SP, BrazilUniv Estadual Paulista, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Campus Rio Claro, BR-13506900 Rio Claro, SP, BrazilFAPESP: 96/09708-9FAPESP: 12/12508-6CNPq: 302903/12-3CNPq: 401039/2014-5Elsevier B.V.Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Friedrich August Univ Erlangen NurnbergMatos, Suzana Aparecida [UNESP]Warren, Lucas Verissimo [UNESP]Fuersich, Franz TheodorAlessandretti, LucianoAssine, Mario Luis [UNESP]Riccomini, ClaudioSimoes, Marcello Guimaraes [UNESP]2018-11-26T17:35:06Z2018-11-26T17:35:06Z2017-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article21-41application/pdfhttp://dx.doi.org/10.1016/j.jsames.2017.04.007Journal Of South American Earth Sciences. Oxford: Pergamon-elsevier Science Ltd, v. 77, p. 21-41, 2017.0895-9811http://hdl.handle.net/11449/16296810.1016/j.jsames.2017.04.007WOS:000405051600002WOS000405051600002.pdf13338453370122560471102133658128Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of South American Earth Sciences0,829info:eu-repo/semantics/openAccess2023-12-23T06:22:21Zoai:repositorio.unesp.br:11449/162968Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:07:11.607962Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? |
title |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? |
spellingShingle |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? Matos, Suzana Aparecida [UNESP] Permian Serra Alta Formation Seep fauna Chemosymbiotic bivalves Intraplate basin |
title_short |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? |
title_full |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? |
title_fullStr |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? |
title_full_unstemmed |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? |
title_sort |
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms? |
author |
Matos, Suzana Aparecida [UNESP] |
author_facet |
Matos, Suzana Aparecida [UNESP] Warren, Lucas Verissimo [UNESP] Fuersich, Franz Theodor Alessandretti, Luciano Assine, Mario Luis [UNESP] Riccomini, Claudio Simoes, Marcello Guimaraes [UNESP] |
author_role |
author |
author2 |
Warren, Lucas Verissimo [UNESP] Fuersich, Franz Theodor Alessandretti, Luciano Assine, Mario Luis [UNESP] Riccomini, Claudio Simoes, Marcello Guimaraes [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) Friedrich August Univ Erlangen Nurnberg |
dc.contributor.author.fl_str_mv |
Matos, Suzana Aparecida [UNESP] Warren, Lucas Verissimo [UNESP] Fuersich, Franz Theodor Alessandretti, Luciano Assine, Mario Luis [UNESP] Riccomini, Claudio Simoes, Marcello Guimaraes [UNESP] |
dc.subject.por.fl_str_mv |
Permian Serra Alta Formation Seep fauna Chemosymbiotic bivalves Intraplate basin |
topic |
Permian Serra Alta Formation Seep fauna Chemosymbiotic bivalves Intraplate basin |
description |
This is the first record of a Permian seep deposit and an associated, morphologically bizarre, bivalve-dominated fauna from the Passa Dois Group, Parana Basin, Brazil. Shales of the outer-shelf facies of the Serra Alta Formation preserve a low-diversity but high-abundant, large-sized bivalve fauna with unusual morphologies inside discoidal carbonate concretions. The bivalves are about ten times larger than tiny bivalves found scattered in laterally equivalent mudstones of the same unit. Intercalated between two concretion-bearing horizons, a cm-thick, sheet-like, disrupted, brecciated, partially silicified carbonate layer with microbially-induced lamination is recorded. In some areas, the carbonate layer shows vertical structures formed by injections of mud mixed with white limestone clasts and microbial linings. Immediately above this, silicified mudstones preserve small domal structures (= mounds) with a slightly depressed center. Monospecific concentrations of closed articulated shells of Tambaquyra camargoi occur at the base of these domes. Carbon-isotope (delta C-13) values from the shells, brecciated carbonates, and fossil-rich concretions are all depleted (negative values similar to -6.1 to -7.6 parts per thousand). Combined taphonomic, sedimentological, petrographic, geochemical and paleontological data suggest that the disrupted, brecciated carbonate and associated fauna and domes may have formed by an exudation system. Indeed, this interval of the Serra Alta Formation is similar to 8.7 m above the contact with the underlying, oil-rich Irati Formation. This unit has very high total organic carbon (up to 23%) values and high sulphur contents, supporting the interpretation of the lithological and paleontological features as result of seepage of organic compounds at the seafloor. Where the gases and hydrocarbons escaped, the seabed was colonized by, at least facultatively, chemosymbiotic bivalves. The species above belong to a highly endemic group of pachydomids that were shallow infaunal bivalves (SIB). Hence, they are not related to classical bivalves with extant representatives, which are chemosymbionts. This may reflect an extreme adaptive radiation and repopulation of anoxic-dysoxic bottoms of the Parana Basin by SIB species. (C) 2017 Elsevier Ltd. All rights reserved. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-08-01 2018-11-26T17:35:06Z 2018-11-26T17:35:06Z |
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://dx.doi.org/10.1016/j.jsames.2017.04.007 Journal Of South American Earth Sciences. Oxford: Pergamon-elsevier Science Ltd, v. 77, p. 21-41, 2017. 0895-9811 http://hdl.handle.net/11449/162968 10.1016/j.jsames.2017.04.007 WOS:000405051600002 WOS000405051600002.pdf 1333845337012256 0471102133658128 |
url |
http://dx.doi.org/10.1016/j.jsames.2017.04.007 http://hdl.handle.net/11449/162968 |
identifier_str_mv |
Journal Of South American Earth Sciences. Oxford: Pergamon-elsevier Science Ltd, v. 77, p. 21-41, 2017. 0895-9811 10.1016/j.jsames.2017.04.007 WOS:000405051600002 WOS000405051600002.pdf 1333845337012256 0471102133658128 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of South American Earth Sciences 0,829 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
21-41 application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129286774718464 |