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dc.rights.licenseAtribución-NoComercial 4.0 Internacional
dc.contributor.authorPardo Villaveces, Natalia
dc.contributor.authorJaramillo, José María
dc.contributor.authorCepeda, Héctor
dc.date.accessioned2019-06-27T23:11:12Z
dc.date.available2019-06-27T23:11:12Z
dc.date.issued2005
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/34051
dc.description.abstractPaipa volcano products are mainly pyroclastic pumice and ash flow tuffs, lava domes and pyroclastic block and ash flow tuffs. They are classified as alkaline rhyolites and trachytes and high-K calcalkaline rhyolites. Chemical data show SiO2 values between 68 and 72%, and alkalis (Na2O+K2O) content of 7%-10%. Essential minerals are phenocrysts and glomerocrysts of anorthoclase, sanidine up to 1,5 cm and anorthoclase-mantled plagioclase; accessory minerals are red biotite, and hastingsite while trace minerals are augite, zircon, sphene and magnetite. Crystals have disequilibrium textures, such as dissolution embayments, corrosion and reabsortion borders, normal, inverse, oscillating and patchy zonation, together with fibrous borders intercalated with euhedral borders. In correlation with published data of Iza volcanic rocks, Paipa rocks chemical composition confirms that acid and alkaline magmas that have erupted in the Eastern Cordillera of Colombia during the Neogene are strongly different from the calc-alkaline magmas that erupt in the westward active arc (Central Cordillera). Detailed structural, geochemical and geophysical research has to be done in future research to establish the geodynamic framework that governs the volcanism of the Eastern Cordillera.
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUNIVERSIDAD NACIONAL DE COLOMBIA
dc.relationhttp://revistas.unal.edu.co/index.php/esrj/article/view/21248
dc.relation.ispartofUniversidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal
dc.relation.ispartofEarth Sciences Research Journal
dc.relation.ispartofseriesEarth Sciences Research Journal; Vol. 9, núm. 2 (2005); 148-164 Earth Sciences Research Journal; Vol. 9, núm. 2 (2005); 148-164 2339-3459 1794-6190
dc.rightsDerechos reservados - Universidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.titleThe paipa volcano, eastern cordillera of colombia, south america (part ii): petrography and major elements petrology
dc.typeArtículo de revista
dc.type.driverinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.eprintshttp://bdigital.unal.edu.co/24131/
dc.relation.referencesPardo Villaveces, Natalia and Jaramillo, José María and Cepeda, Héctor (2005) The paipa volcano, eastern cordillera of colombia, south america (part ii): petrography and major elements petrology. Earth Sciences Research Journal; Vol. 9, núm. 2 (2005); 148-164 Earth Sciences Research Journal; Vol. 9, núm. 2 (2005); 148-164 2339-3459 1794-6190 .
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.type.coarhttp://purl.org/coar/resource_type/c_6501
dc.type.coarversionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.contentText
dc.type.redcolhttp://purl.org/redcol/resource_type/ART
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2


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Atribución-NoComercial 4.0 InternacionalThis work is licensed under a Creative Commons Reconocimiento-NoComercial 4.0.This document has been deposited by the author (s) under the following certificate of deposit