Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean

Recent data indicating that the Piaxtla Suite (Acatlán Complex, southern Mexico) underwent eclogite-facies metamorphism and exhumation during the Devono-Carboniferous suggest an origin within the Rheic Ocean rather than the Iapetus Ocean. The Ası´s Lithodeme (Piaxtla Suite) consists of polydeformed...

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Autores: Murphy, J. Brendam, Keppie, J. Duncan, Nance, R. Damian, Miller, Brent V., Dostal, Jaroslav, Middleton, Matt, Fernández Suárez, Javier, Jeffries, Teresa E., Storey, Craig D.
Tipo de recurso: artículo
Fecha de publicación:2006
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/52742
Acceso en línea:https://hdl.handle.net/20.500.14352/52742
Access Level:acceso abierto
Palabra clave:550.4
551.2
U-Pb
Mexico
Tectonics
Geodinámica
Geoquímica
2507 Geofísica
2503 Geoquímica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/52742
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network_name_str España
repository_id_str
spelling Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic OceanMurphy, J. BrendamKeppie, J. DuncanNance, R. DamianMiller, Brent V.Dostal, JaroslavMiddleton, MattFernández Suárez, JavierJeffries, Teresa E.Storey, Craig D.550.4551.2U-PbMexicoTectonicsGeodinámicaGeoquímica2507 Geofísica2503 GeoquímicaRecent data indicating that the Piaxtla Suite (Acatlán Complex, southern Mexico) underwent eclogite-facies metamorphism and exhumation during the Devono-Carboniferous suggest an origin within the Rheic Ocean rather than the Iapetus Ocean. The Ası´s Lithodeme (Piaxtla Suite) consists of polydeformed metasediments and eclogitic amphibolites that are intruded by megacrystic granitoid rocks. U–Pb (zircon) data indicate that the metasediments were deposited after c. 700 Ma and before intrusion of c. 470–420 Ma quartz-augen granite. The metasedimentary rocks contain abundant Mesoproterozoic detrital zircons (c. 1050–1250 Ma) and a few zircons in the range of c. 900–992 and c. 1330–1662 Ma. Their geochemical and Sm–Nd isotopic signature is typical of rift-related, passive margin sediments derived from an ancient cratonic source, which is interpreted to be the adjacent Mesoproterozoic Oaxacan Complex. Megacrystic granites were derived by partial melting of a c. 1 Ga crustal source, similar to the Oaxacan Complex. Amphibolitic layers exhibit a continental tholeiitic geochemistry, with a c. 0.8–1.1 Ga source (TDM age), and are inferred to have originated in a rift-related environment by melting of lithospheric mantle in the Ordovician. This rifting may be related to the Early Ordovician drift of peri-Gondwanan terranes (e.g. Avalonia) from Gondwana and the origin of the Rheic Ocean.Geological Society, LondonUniversidad Complutense de Madrid20062006-01-0120062006-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/52742reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/527422026-06-02T12:44:21Z
dc.title.none.fl_str_mv Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
title Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
spellingShingle Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
Murphy, J. Brendam
550.4
551.2
U-Pb
Mexico
Tectonics
Geodinámica
Geoquímica
2507 Geofísica
2503 Geoquímica
title_short Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
title_full Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
title_fullStr Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
title_full_unstemmed Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
title_sort Geochemistry and U–Pb protolith ages of eclogitic rocks of the Ası´s Lithodeme, Piaxtla Suite, Acatla´n Complex, southern Mexico: tectonothermal activity along the southern margin of the Rheic Ocean
dc.creator.none.fl_str_mv Murphy, J. Brendam
Keppie, J. Duncan
Nance, R. Damian
Miller, Brent V.
Dostal, Jaroslav
Middleton, Matt
Fernández Suárez, Javier
Jeffries, Teresa E.
Storey, Craig D.
author Murphy, J. Brendam
author_facet Murphy, J. Brendam
Keppie, J. Duncan
Nance, R. Damian
Miller, Brent V.
Dostal, Jaroslav
Middleton, Matt
Fernández Suárez, Javier
Jeffries, Teresa E.
Storey, Craig D.
author_role author
author2 Keppie, J. Duncan
Nance, R. Damian
Miller, Brent V.
Dostal, Jaroslav
Middleton, Matt
Fernández Suárez, Javier
Jeffries, Teresa E.
Storey, Craig D.
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 550.4
551.2
U-Pb
Mexico
Tectonics
Geodinámica
Geoquímica
2507 Geofísica
2503 Geoquímica
topic 550.4
551.2
U-Pb
Mexico
Tectonics
Geodinámica
Geoquímica
2507 Geofísica
2503 Geoquímica
description Recent data indicating that the Piaxtla Suite (Acatlán Complex, southern Mexico) underwent eclogite-facies metamorphism and exhumation during the Devono-Carboniferous suggest an origin within the Rheic Ocean rather than the Iapetus Ocean. The Ası´s Lithodeme (Piaxtla Suite) consists of polydeformed metasediments and eclogitic amphibolites that are intruded by megacrystic granitoid rocks. U–Pb (zircon) data indicate that the metasediments were deposited after c. 700 Ma and before intrusion of c. 470–420 Ma quartz-augen granite. The metasedimentary rocks contain abundant Mesoproterozoic detrital zircons (c. 1050–1250 Ma) and a few zircons in the range of c. 900–992 and c. 1330–1662 Ma. Their geochemical and Sm–Nd isotopic signature is typical of rift-related, passive margin sediments derived from an ancient cratonic source, which is interpreted to be the adjacent Mesoproterozoic Oaxacan Complex. Megacrystic granites were derived by partial melting of a c. 1 Ga crustal source, similar to the Oaxacan Complex. Amphibolitic layers exhibit a continental tholeiitic geochemistry, with a c. 0.8–1.1 Ga source (TDM age), and are inferred to have originated in a rift-related environment by melting of lithospheric mantle in the Ordovician. This rifting may be related to the Early Ordovician drift of peri-Gondwanan terranes (e.g. Avalonia) from Gondwana and the origin of the Rheic Ocean.
publishDate 2006
dc.date.none.fl_str_mv 2006
2006-01-01
2006
2006-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/52742
url https://hdl.handle.net/20.500.14352/52742
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Geological Society, London
publisher.none.fl_str_mv Geological Society, London
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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