Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys

Amphibole-rich cumulates provide crucial information pertaining to the petrogenetic history of suprasubduction zone ophiolites and are, therefore, helpful in constraining the evolution and closure of the Neo-Tethys during the late Cretaceous to the early Tertiary period. Following this, the present...

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Autores: Sahoo, Sapneswar, Majumdar, Alik S., Anand, Rajagopal, Ray, Dwijesh, Fuenlabrada Pérez, José Manuel
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/121783
Acceso en línea:https://hdl.handle.net/20.500.14352/121783
Access Level:acceso abierto
Palabra clave:552.3:551.24
Hornblendite
Arc cumulate
Super hydrous magma
Intraoceanic subduction
Neo-Tethys
Eastern Himalaya
Petrología
Geodinámica
2506.13 Petrología Ignea y Metamórfica
2506.20 Geología Estructural
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spelling Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-TethysSahoo, SapneswarMajumdar, Alik S.Anand, RajagopalRay, DwijeshFuenlabrada Pérez, José Manuel552.3:551.24HornblenditeArc cumulateSuper hydrous magmaIntraoceanic subductionNeo-TethysEastern HimalayaPetrologíaGeodinámica2506.13 Petrología Ignea y Metamórfica2506.20 Geología EstructuralAmphibole-rich cumulates provide crucial information pertaining to the petrogenetic history of suprasubduction zone ophiolites and are, therefore, helpful in constraining the evolution and closure of the Neo-Tethys during the late Cretaceous to the early Tertiary period. Following this, the present contribution examines the meta-hornblendite and meta-hornblende-gabbro lithologies in the Mayudia ophiolite complex (MdOC), NE Himalaya, based on their field and petrographic relations, constituent mineral compositions, whole rock major and trace element chemistry and bulk strontium (Sr)—neodymium (Nd) isotope systematics. MdOC cumulates potentially represent the fossilized record of an island arc root, where amphibole + titanite + magnetite was fractionally crystallized from a super hydrous magma (10.56–13.61 wt.% melt water content) prior to plagioclase in a stable physico-chemical condition (T: 865–940 °C, P: 0.8–1.4 GPa, logfO2: −8.59–−11.19 unit) at lower crustal depths (30–38 km). Such extreme hydrous nature in the parental magma was generated by the flux melting of the sub-arc mantle wedge with aqueous inputs from the dehydrating slab. A super hydrous magmatic reservoir was, therefore, extant at sub-arc mantle depths in the eastern Neo-Tethys, which has likely modulated the composition of the oceanic crust during intraoceanic subduction.MDPIUniversidad Complutense de Madrid20252025-05-2720252025-05-27journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/121783reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1217832026-06-02T12:44:21Z
dc.title.none.fl_str_mv Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
title Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
spellingShingle Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
Sahoo, Sapneswar
552.3:551.24
Hornblendite
Arc cumulate
Super hydrous magma
Intraoceanic subduction
Neo-Tethys
Eastern Himalaya
Petrología
Geodinámica
2506.13 Petrología Ignea y Metamórfica
2506.20 Geología Estructural
title_short Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
title_full Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
title_fullStr Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
title_full_unstemmed Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
title_sort Petrogenesis of mafic–ultramafic cumulates in the Mayudia Ophiolite Complex, NE Himalaya: evidence of an island arc root in Eastern Neo-Tethys
dc.creator.none.fl_str_mv Sahoo, Sapneswar
Majumdar, Alik S.
Anand, Rajagopal
Ray, Dwijesh
Fuenlabrada Pérez, José Manuel
author Sahoo, Sapneswar
author_facet Sahoo, Sapneswar
Majumdar, Alik S.
Anand, Rajagopal
Ray, Dwijesh
Fuenlabrada Pérez, José Manuel
author_role author
author2 Majumdar, Alik S.
Anand, Rajagopal
Ray, Dwijesh
Fuenlabrada Pérez, José Manuel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 552.3:551.24
Hornblendite
Arc cumulate
Super hydrous magma
Intraoceanic subduction
Neo-Tethys
Eastern Himalaya
Petrología
Geodinámica
2506.13 Petrología Ignea y Metamórfica
2506.20 Geología Estructural
topic 552.3:551.24
Hornblendite
Arc cumulate
Super hydrous magma
Intraoceanic subduction
Neo-Tethys
Eastern Himalaya
Petrología
Geodinámica
2506.13 Petrología Ignea y Metamórfica
2506.20 Geología Estructural
description Amphibole-rich cumulates provide crucial information pertaining to the petrogenetic history of suprasubduction zone ophiolites and are, therefore, helpful in constraining the evolution and closure of the Neo-Tethys during the late Cretaceous to the early Tertiary period. Following this, the present contribution examines the meta-hornblendite and meta-hornblende-gabbro lithologies in the Mayudia ophiolite complex (MdOC), NE Himalaya, based on their field and petrographic relations, constituent mineral compositions, whole rock major and trace element chemistry and bulk strontium (Sr)—neodymium (Nd) isotope systematics. MdOC cumulates potentially represent the fossilized record of an island arc root, where amphibole + titanite + magnetite was fractionally crystallized from a super hydrous magma (10.56–13.61 wt.% melt water content) prior to plagioclase in a stable physico-chemical condition (T: 865–940 °C, P: 0.8–1.4 GPa, logfO2: −8.59–−11.19 unit) at lower crustal depths (30–38 km). Such extreme hydrous nature in the parental magma was generated by the flux melting of the sub-arc mantle wedge with aqueous inputs from the dehydrating slab. A super hydrous magmatic reservoir was, therefore, extant at sub-arc mantle depths in the eastern Neo-Tethys, which has likely modulated the composition of the oceanic crust during intraoceanic subduction.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-05-27
2025
2025-05-27
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/121783
url https://hdl.handle.net/20.500.14352/121783
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
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
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
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
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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