Cosmic spherules from the Ordovician of Argentina

Autores
Voldman, Gustavo Gabriel; Genge, G. L.; Albanesi, Guillermo Luis; Barnes, C. R.; Ortega, Gladys del Carmen
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The discovery of magnetic spherules in acid-insoluble residues from conodont samples encouraged a systematic search for Ordovician micrometeorites from Northwestern Argentina. Some 220 melted micrometeorites were recovered from the magnetic fraction of 6 samples (total rock weight: 23 kg) from the Cordillera Oriental (Santa Rosita Formation) and 17 from 5 samples (total rock weight: 8.9 kg) from the Argentine Precordillera (Las Aguaditas, Gualcamayo and Las Vacas formations). The specimens resemble I-type cosmic spherules, in their chemistry and distinct dendritic and polygonal crystalline structures. They represent a flux of micrometeorites several orders of magnitude greater than present. The wide differences in spherule abundance between the Precordillera and the Cordillera Oriental samples could reflect uncertainties in the sedimentary rates or temporal variations in the flux of extraterrestrial matter to Earth. The micrometeorite-bearing formations span the late Tremadocian to the late Darriliwian (~480-460 Ma), which is consistent with a period of elevated flux of extraterrestrial material, as recorded several thousand kilometres away from coeval horizons in Scotland, Sweden and central China. 
Fil: Voldman, Gustavo Gabriel. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Genge, G. L.. Imperial College London; Reino Unido
Fil: Albanesi, Guillermo Luis. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Barnes, C. R.. Scholl Of Earth And Ocean Sciences; Canadá
Fil: Ortega, Gladys del Carmen. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Museo de Paleontología; Argentina
Materia
MICROSPHERULES
COSMIC DUST
ORDOVICIAN
CORDILLERA ORIENTAL
PRECORDILLERA
ARGENTINA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/181476
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/181476
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Cosmic spherules from the Ordovician of ArgentinaVoldman, Gustavo GabrielGenge, G. L.Albanesi, Guillermo LuisBarnes, C. R.Ortega, Gladys del CarmenMICROSPHERULESCOSMIC DUSTORDOVICIANCORDILLERA ORIENTALPRECORDILLERAARGENTINAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The discovery of magnetic spherules in acid-insoluble residues from conodont samples encouraged a systematic search for Ordovician micrometeorites from Northwestern Argentina. Some 220 melted micrometeorites were recovered from the magnetic fraction of 6 samples (total rock weight: 23 kg) from the Cordillera Oriental (Santa Rosita Formation) and 17 from 5 samples (total rock weight: 8.9 kg) from the Argentine Precordillera (Las Aguaditas, Gualcamayo and Las Vacas formations). The specimens resemble I-type cosmic spherules, in their chemistry and distinct dendritic and polygonal crystalline structures. They represent a flux of micrometeorites several orders of magnitude greater than present. The wide differences in spherule abundance between the Precordillera and the Cordillera Oriental samples could reflect uncertainties in the sedimentary rates or temporal variations in the flux of extraterrestrial matter to Earth. The micrometeorite-bearing formations span the late Tremadocian to the late Darriliwian (~480-460 Ma), which is consistent with a period of elevated flux of extraterrestrial material, as recorded several thousand kilometres away from coeval horizons in Scotland, Sweden and central China. Fil: Voldman, Gustavo Gabriel. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Genge, G. L.. Imperial College London; Reino UnidoFil: Albanesi, Guillermo Luis. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Barnes, C. R.. Scholl Of Earth And Ocean Sciences; CanadáFil: Ortega, Gladys del Carmen. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Museo de Paleontología; ArgentinaJohn Wiley & Sons Ltd2013-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/181476Voldman, Gustavo Gabriel; Genge, G. L.; Albanesi, Guillermo Luis; Barnes, C. R.; Ortega, Gladys del Carmen; Cosmic spherules from the Ordovician of Argentina; John Wiley & Sons Ltd; Geological Journal (Chichester); 48; 2-3; 1-3-2013; 222-2350072-10501099-1034CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/gj.2418/abstractinfo:eu-repo/semantics/altIdentifier/doi/10.1002/gj.2418/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:04:48Zoai:ri.conicet.gov.ar:11336/181476instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:04:48.818CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Cosmic spherules from the Ordovician of Argentina
title Cosmic spherules from the Ordovician of Argentina
spellingShingle Cosmic spherules from the Ordovician of Argentina
Voldman, Gustavo Gabriel
MICROSPHERULES
COSMIC DUST
ORDOVICIAN
CORDILLERA ORIENTAL
PRECORDILLERA
ARGENTINA
title_short Cosmic spherules from the Ordovician of Argentina
title_full Cosmic spherules from the Ordovician of Argentina
title_fullStr Cosmic spherules from the Ordovician of Argentina
title_full_unstemmed Cosmic spherules from the Ordovician of Argentina
title_sort Cosmic spherules from the Ordovician of Argentina
dc.creator.none.fl_str_mv Voldman, Gustavo Gabriel
Genge, G. L.
Albanesi, Guillermo Luis
Barnes, C. R.
Ortega, Gladys del Carmen
author Voldman, Gustavo Gabriel
author_facet Voldman, Gustavo Gabriel
Genge, G. L.
Albanesi, Guillermo Luis
Barnes, C. R.
Ortega, Gladys del Carmen
author_role author
author2 Genge, G. L.
Albanesi, Guillermo Luis
Barnes, C. R.
Ortega, Gladys del Carmen
author2_role author
author
author
author
dc.subject.none.fl_str_mv MICROSPHERULES
COSMIC DUST
ORDOVICIAN
CORDILLERA ORIENTAL
PRECORDILLERA
ARGENTINA
topic MICROSPHERULES
COSMIC DUST
ORDOVICIAN
CORDILLERA ORIENTAL
PRECORDILLERA
ARGENTINA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The discovery of magnetic spherules in acid-insoluble residues from conodont samples encouraged a systematic search for Ordovician micrometeorites from Northwestern Argentina. Some 220 melted micrometeorites were recovered from the magnetic fraction of 6 samples (total rock weight: 23 kg) from the Cordillera Oriental (Santa Rosita Formation) and 17 from 5 samples (total rock weight: 8.9 kg) from the Argentine Precordillera (Las Aguaditas, Gualcamayo and Las Vacas formations). The specimens resemble I-type cosmic spherules, in their chemistry and distinct dendritic and polygonal crystalline structures. They represent a flux of micrometeorites several orders of magnitude greater than present. The wide differences in spherule abundance between the Precordillera and the Cordillera Oriental samples could reflect uncertainties in the sedimentary rates or temporal variations in the flux of extraterrestrial matter to Earth. The micrometeorite-bearing formations span the late Tremadocian to the late Darriliwian (~480-460 Ma), which is consistent with a period of elevated flux of extraterrestrial material, as recorded several thousand kilometres away from coeval horizons in Scotland, Sweden and central China. 
Fil: Voldman, Gustavo Gabriel. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Genge, G. L.. Imperial College London; Reino Unido
Fil: Albanesi, Guillermo Luis. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Barnes, C. R.. Scholl Of Earth And Ocean Sciences; Canadá
Fil: Ortega, Gladys del Carmen. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geologia Básica y Aplicada; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Museo de Paleontología; Argentina
description The discovery of magnetic spherules in acid-insoluble residues from conodont samples encouraged a systematic search for Ordovician micrometeorites from Northwestern Argentina. Some 220 melted micrometeorites were recovered from the magnetic fraction of 6 samples (total rock weight: 23 kg) from the Cordillera Oriental (Santa Rosita Formation) and 17 from 5 samples (total rock weight: 8.9 kg) from the Argentine Precordillera (Las Aguaditas, Gualcamayo and Las Vacas formations). The specimens resemble I-type cosmic spherules, in their chemistry and distinct dendritic and polygonal crystalline structures. They represent a flux of micrometeorites several orders of magnitude greater than present. The wide differences in spherule abundance between the Precordillera and the Cordillera Oriental samples could reflect uncertainties in the sedimentary rates or temporal variations in the flux of extraterrestrial matter to Earth. The micrometeorite-bearing formations span the late Tremadocian to the late Darriliwian (~480-460 Ma), which is consistent with a period of elevated flux of extraterrestrial material, as recorded several thousand kilometres away from coeval horizons in Scotland, Sweden and central China. 
publishDate 2013
dc.date.none.fl_str_mv 2013-03-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/181476
Voldman, Gustavo Gabriel; Genge, G. L.; Albanesi, Guillermo Luis; Barnes, C. R.; Ortega, Gladys del Carmen; Cosmic spherules from the Ordovician of Argentina; John Wiley & Sons Ltd; Geological Journal (Chichester); 48; 2-3; 1-3-2013; 222-235
0072-1050
1099-1034
CONICET Digital
CONICET
url http://hdl.handle.net/11336/181476
identifier_str_mv Voldman, Gustavo Gabriel; Genge, G. L.; Albanesi, Guillermo Luis; Barnes, C. R.; Ortega, Gladys del Carmen; Cosmic spherules from the Ordovician of Argentina; John Wiley & Sons Ltd; Geological Journal (Chichester); 48; 2-3; 1-3-2013; 222-235
0072-1050
1099-1034
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/gj.2418/abstract
info:eu-repo/semantics/altIdentifier/doi/10.1002/gj.2418/abstract
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons Ltd
publisher.none.fl_str_mv John Wiley & Sons Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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