A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia

A Barrovian sequence of the Silgará Formation at the southwestern Santander Massif, Colombian Andes, contains zoned garnets in which major and trace element zoning correlates with distribution of mineral inclusions, which may indicate that garnet growth rate varied through time and affected both com...

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Autores:
Ríos Reyes, Carlos Alberto
Castellanos Alarcón, Oscar Mauricio
Takasu, Akira
Tipo de recurso:
Article of journal
Fecha de publicación:
2008
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/34000
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/34000
http://bdigital.unal.edu.co/24080/
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openAccess
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Atribución-NoComercial 4.0 Internacional
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Ríos Reyes, Carlos Albertoeca95664-2302-46e7-adc7-e47168e5f6e8300Castellanos Alarcón, Oscar Mauricio45874de0-ff73-49ab-a6fe-b8e989d4291e300Takasu, Akirac6071a25-c6b8-4ad9-81ed-6943bbd18e703002019-06-27T23:09:26Z2019-06-27T23:09:26Z2008https://repositorio.unal.edu.co/handle/unal/34000http://bdigital.unal.edu.co/24080/A Barrovian sequence of the Silgará Formation at the southwestern Santander Massif, Colombian Andes, contains zoned garnets in which major and trace element zoning correlates with distribution of mineral inclusions, which may indicate that garnet growth rate varied through time and affected both composition and texture ofgarnets, although different garnet producing reactions have also played an important role in the chemical zoning of garent. However, a local metasomatism process associated to the action of late magmatic fluids associated to the emplacement of the Pescadero Pluton (external forcing mechanism) would be also considered. In particular, Ca, Mn and Y zoning patterns in some garnets correspond with inclusion-rich vs. inclusion-free zones, althoughthe distribution of inclusions does not correlate with chemical zoning (i.e., the same inclusions are found in Ca-rich and Ca-poor zones of the garnet). There is a similar lack of correlation with accessory phases (apatite, monazite, xenotime, ilmenite or rutile). In a garnet from the garnet-staurolite zone, a high Mn core containsabundant and randomly oriented apatite, monazite and ilmenite inclusions, while a euhedral low Ca mantle zone is inclusion-free and the high Ca / low Mn rim zone contains apatite, monazite and ilmenite aligned parallel to the margins of the garnet. Inclusions in garnet can also represent mineral phases were not completely consumed during garnet growth. Association of garnet zoning trends and patterns with inclusion distribution may help differentiatebetween processes that identically affect major-element zoning but that produced variable textures in the garnet.application/pdfspaUNIVERSIDAD NACIONAL DE COLOMBIAhttp://revistas.unal.edu.co/index.php/esrj/article/view/21192Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research JournalEarth Sciences Research JournalEarth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 2339-3459 1794-6190Ríos Reyes, Carlos Alberto and Castellanos Alarcón, Oscar Mauricio and Takasu, Akira (2008) A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia. Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 2339-3459 1794-6190 .A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombiaArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL21192-71917-1-PB.pdfapplication/pdf2035745https://repositorio.unal.edu.co/bitstream/unal/34000/1/21192-71917-1-PB.pdf7a797d26742f2b91761eb4c0d83d626bMD51THUMBNAIL21192-71917-1-PB.pdf.jpg21192-71917-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg6173https://repositorio.unal.edu.co/bitstream/unal/34000/2/21192-71917-1-PB.pdf.jpg0231b8739285e2a2b0842c428601c385MD52unal/34000oai:repositorio.unal.edu.co:unal/340002022-12-29 23:03:05.377Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
title A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
spellingShingle A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
title_short A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
title_full A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
title_fullStr A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
title_full_unstemmed A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
title_sort A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia
dc.creator.fl_str_mv Ríos Reyes, Carlos Alberto
Castellanos Alarcón, Oscar Mauricio
Takasu, Akira
dc.contributor.author.spa.fl_str_mv Ríos Reyes, Carlos Alberto
Castellanos Alarcón, Oscar Mauricio
Takasu, Akira
description A Barrovian sequence of the Silgará Formation at the southwestern Santander Massif, Colombian Andes, contains zoned garnets in which major and trace element zoning correlates with distribution of mineral inclusions, which may indicate that garnet growth rate varied through time and affected both composition and texture ofgarnets, although different garnet producing reactions have also played an important role in the chemical zoning of garent. However, a local metasomatism process associated to the action of late magmatic fluids associated to the emplacement of the Pescadero Pluton (external forcing mechanism) would be also considered. In particular, Ca, Mn and Y zoning patterns in some garnets correspond with inclusion-rich vs. inclusion-free zones, althoughthe distribution of inclusions does not correlate with chemical zoning (i.e., the same inclusions are found in Ca-rich and Ca-poor zones of the garnet). There is a similar lack of correlation with accessory phases (apatite, monazite, xenotime, ilmenite or rutile). In a garnet from the garnet-staurolite zone, a high Mn core containsabundant and randomly oriented apatite, monazite and ilmenite inclusions, while a euhedral low Ca mantle zone is inclusion-free and the high Ca / low Mn rim zone contains apatite, monazite and ilmenite aligned parallel to the margins of the garnet. Inclusions in garnet can also represent mineral phases were not completely consumed during garnet growth. Association of garnet zoning trends and patterns with inclusion distribution may help differentiatebetween processes that identically affect major-element zoning but that produced variable textures in the garnet.
publishDate 2008
dc.date.issued.spa.fl_str_mv 2008
dc.date.accessioned.spa.fl_str_mv 2019-06-27T23:09:26Z
dc.date.available.spa.fl_str_mv 2019-06-27T23:09:26Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/24080/
url https://repositorio.unal.edu.co/handle/unal/34000
http://bdigital.unal.edu.co/24080/
dc.language.iso.spa.fl_str_mv spa
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dc.relation.spa.fl_str_mv http://revistas.unal.edu.co/index.php/esrj/article/view/21192
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal
Earth Sciences Research Journal
dc.relation.ispartofseries.none.fl_str_mv Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 2339-3459 1794-6190
dc.relation.references.spa.fl_str_mv Ríos Reyes, Carlos Alberto and Castellanos Alarcón, Oscar Mauricio and Takasu, Akira (2008) A new interpretation for the garnet zoning in metapelitic rocks of the silgará formation, southwestern santander massif, colombia. Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 7-30 2339-3459 1794-6190 .
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
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dc.publisher.spa.fl_str_mv UNIVERSIDAD NACIONAL DE COLOMBIA
institution Universidad Nacional de Colombia
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