Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province

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Ultramafic rocks occur scattered along a 300 km long NNW-SSE trending belt, lying parallel to the central Peruvian Andean direction in the Cordillera Oriental, from Tarma (Junín Dept.) to Huánuco and Tingo María (Huánuco Dept.). The Tarma occurrences (Tapo and Acobamba) are studied, as first step of...

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Detalles Bibliográficos
Autores: Castroviejo Bolibar, Ricardo, Pereira, Eurico, Rodrigues, José Feliciano, Acosta Ale, Jorge Gilberto
Formato: objeto de conferencia
Fecha de Publicación:2009
Institución:Instituto Geológico, Minero y Metalúrgico
Repositorio:INGEMMET-Institucional
Lenguaje:inglés
OAI Identifier:oai:repositorio.ingemmet.gob.pe:20.500.12544/3856
Enlace del recurso:https://hdl.handle.net/20.500.12544/3856
Nivel de acceso:acceso abierto
Materia:Cromita
Macizo rocoso
Petrología
Minerales
http://purl.org/pe-repo/ocde/ford#1.05.00
http://purl.org/pe-repo/ocde/ford#1.05.06
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dc.title.es_PE.fl_str_mv Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
title Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
spellingShingle Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
Castroviejo Bolibar, Ricardo
Cromita
Macizo rocoso
Petrología
Minerales
http://purl.org/pe-repo/ocde/ford#1.05.00
http://purl.org/pe-repo/ocde/ford#1.05.06
title_short Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
title_full Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
title_fullStr Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
title_full_unstemmed Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
title_sort Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province
author Castroviejo Bolibar, Ricardo
author_facet Castroviejo Bolibar, Ricardo
Pereira, Eurico
Rodrigues, José Feliciano
Acosta Ale, Jorge Gilberto
author_role author
author2 Pereira, Eurico
Rodrigues, José Feliciano
Acosta Ale, Jorge Gilberto
author2_role author
author
author
dc.contributor.author.fl_str_mv Castroviejo Bolibar, Ricardo
Pereira, Eurico
Rodrigues, José Feliciano
Acosta Ale, Jorge Gilberto
dc.subject.es_PE.fl_str_mv Cromita
Macizo rocoso
Petrología
Minerales
topic Cromita
Macizo rocoso
Petrología
Minerales
http://purl.org/pe-repo/ocde/ford#1.05.00
http://purl.org/pe-repo/ocde/ford#1.05.06
dc.subject.ocde.es_PE.fl_str_mv http://purl.org/pe-repo/ocde/ford#1.05.00
http://purl.org/pe-repo/ocde/ford#1.05.06
description Ultramafic rocks occur scattered along a 300 km long NNW-SSE trending belt, lying parallel to the central Peruvian Andean direction in the Cordillera Oriental, from Tarma (Junín Dept.) to Huánuco and Tingo María (Huánuco Dept.). The Tarma occurrences (Tapo and Acobamba) are studied, as first step of a broader research. The Tapo massif comprises strongly tectonised serpentinites with scarce peridotitic relics, amphibolites and podiform chromitites. It is overthrust on the lower carboniferous metasediments of the andean basement (Ambo Group), and it shows evidences of a pre-andean deformational history, not found in the Ambo Group; the basal thrust plane is folded by Andean tectonics. The two smaller Acobamba occurrences are also allochtonous and show similar tectonic characteristica. Major and trace element compositions of the amphibolites point to a tholeiitic basalt (to picrobasalt) protolith, compatible with an ocean ridge or ocean island environment. Small scale mining worked podiform chromitite lenses and chromite disseminations, strongly deformed, metamorphosed and overprinted by hydrothermal alteration related to deformation. The ores comprise mainly chromite, ferritchromite, spinel, magnetite, ilmenite and scarce sulphides, as well as the secondary minerals stichtite and nimite. Results of this work exclude current interpretations of the Tarma ultramafites as autochtonous igneous intrusives.
publishDate 2009
dc.date.accessioned.none.fl_str_mv 2022-05-16T14:49:06Z
dc.date.available.none.fl_str_mv 2022-05-16T14:49:06Z
dc.date.issued.fl_str_mv 2009
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dc.identifier.citation.es_PE.fl_str_mv Castroviejo, R.; Pereira, E.; Rodrigues, J.; & Acosta, J. (2009) - Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province. En: Williams, P. J, ed. Smart Science for Exploration and Mining. Proceedings of the 10th Biennial SGA meeting of The Society for Geology Applied to Mineral Deposits, Townsville, Australia, 17-20 August 2009. Townsville: Economic Geology Research, p. 927-929.
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/20.500.12544/3856
dc.identifier.bibliographicCitation.es_PE.fl_str_mv Smart Science for Exploration and Mining. Proceedings of the 10th Biennial SGA meeting of The Society for Geology Applied to Mineral Deposits, Townsville, Australia, 17-20 August 2009
identifier_str_mv Castroviejo, R.; Pereira, E.; Rodrigues, J.; & Acosta, J. (2009) - Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province. En: Williams, P. J, ed. Smart Science for Exploration and Mining. Proceedings of the 10th Biennial SGA meeting of The Society for Geology Applied to Mineral Deposits, Townsville, Australia, 17-20 August 2009. Townsville: Economic Geology Research, p. 927-929.
Smart Science for Exploration and Mining. Proceedings of the 10th Biennial SGA meeting of The Society for Geology Applied to Mineral Deposits, Townsville, Australia, 17-20 August 2009
url https://hdl.handle.net/20.500.12544/3856
dc.language.iso.es_PE.fl_str_mv eng
language eng
dc.rights.es_PE.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.format.es_PE.fl_str_mv application/pdf
dc.format.extent.es_PE.fl_str_mv 3 páginas
dc.coverage.spatial.es_PE.fl_str_mv Tarma
Junín
Cordillera Oriental
Perú
dc.publisher.es_PE.fl_str_mv Economic Geology Research
dc.publisher.country.es_PE.fl_str_mv PE
dc.source.es_PE.fl_str_mv Repositorio Institucional INGEMMET
Instituto Geológico, Minero y Metalúrgico – INGEMMET
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instname:Instituto Geológico, Minero y Metalúrgico
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spelling Castroviejo Bolibar, RicardoPereira, EuricoRodrigues, José FelicianoAcosta Ale, Jorge GilbertoTarmaJunínCordillera OrientalPerú2022-05-16T14:49:06Z2022-05-16T14:49:06Z2009Castroviejo, R.; Pereira, E.; Rodrigues, J.; & Acosta, J. (2009) - Pre-andean serpentinite-chromite orebodies in the Eastern Cordillera of Central Perú, Tarma province. En: Williams, P. J, ed. Smart Science for Exploration and Mining. Proceedings of the 10th Biennial SGA meeting of The Society for Geology Applied to Mineral Deposits, Townsville, Australia, 17-20 August 2009. Townsville: Economic Geology Research, p. 927-929.https://hdl.handle.net/20.500.12544/3856Smart Science for Exploration and Mining. Proceedings of the 10th Biennial SGA meeting of The Society for Geology Applied to Mineral Deposits, Townsville, Australia, 17-20 August 2009Ultramafic rocks occur scattered along a 300 km long NNW-SSE trending belt, lying parallel to the central Peruvian Andean direction in the Cordillera Oriental, from Tarma (Junín Dept.) to Huánuco and Tingo María (Huánuco Dept.). The Tarma occurrences (Tapo and Acobamba) are studied, as first step of a broader research. The Tapo massif comprises strongly tectonised serpentinites with scarce peridotitic relics, amphibolites and podiform chromitites. It is overthrust on the lower carboniferous metasediments of the andean basement (Ambo Group), and it shows evidences of a pre-andean deformational history, not found in the Ambo Group; the basal thrust plane is folded by Andean tectonics. The two smaller Acobamba occurrences are also allochtonous and show similar tectonic characteristica. Major and trace element compositions of the amphibolites point to a tholeiitic basalt (to picrobasalt) protolith, compatible with an ocean ridge or ocean island environment. Small scale mining worked podiform chromitite lenses and chromite disseminations, strongly deformed, metamorphosed and overprinted by hydrothermal alteration related to deformation. The ores comprise mainly chromite, ferritchromite, spinel, magnetite, ilmenite and scarce sulphides, as well as the secondary minerals stichtite and nimite. 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