Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca
Jambaló greenschist and blueschist are found in a metamorphic unit that belongs to the Arquía complex. Metamorphism of these rocks is associated with the subduction of the Proto-Caribbean under the South American plate. Age of metamorphism has been estimated by Bustamante (2008) with Ar-Ar method as...
- Autores:
-
Carmona Mongua, Valentina
- Tipo de recurso:
- Trabajo de grado de pregrado
- Fecha de publicación:
- 2017
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/39911
- Acceso en línea:
- http://hdl.handle.net/1992/39911
- Palabra clave:
- Geología estructural
Petrología
Esquistos
Geociencias
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-sa/4.0/
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Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca |
| title |
Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca |
| spellingShingle |
Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca Geología estructural Petrología Esquistos Geociencias |
| title_short |
Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca |
| title_full |
Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca |
| title_fullStr |
Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca |
| title_full_unstemmed |
Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca |
| title_sort |
Petrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, Cauca |
| dc.creator.fl_str_mv |
Carmona Mongua, Valentina |
| dc.contributor.advisor.none.fl_str_mv |
Blanco Quintero, Idael Rodríguez Vargas, Andrés Ignacio |
| dc.contributor.author.none.fl_str_mv |
Carmona Mongua, Valentina |
| dc.contributor.jury.none.fl_str_mv |
Rojas-Agramonte, Yamirka |
| dc.subject.keyword.es_CO.fl_str_mv |
Geología estructural Petrología Esquistos |
| topic |
Geología estructural Petrología Esquistos Geociencias |
| dc.subject.themes.none.fl_str_mv |
Geociencias |
| description |
Jambaló greenschist and blueschist are found in a metamorphic unit that belongs to the Arquía complex. Metamorphism of these rocks is associated with the subduction of the Proto-Caribbean under the South American plate. Age of metamorphism has been estimated by Bustamante (2008) with Ar-Ar method as Maastrichtian-Danian (67-61 Ma). Paragenesis of blueschist facies rocks is Glaucophane (Fe-glaucophane) + quartz + phengite + albite + epidote + chlorite (pycnochlorite) garnet, and paragenesis of greenschist facies rock is albite + quartz + chlorite (pycnochlorite) + calcite + epidote. Greenschist rocks have been altered by an infiltrating fluid with CO2, transforming the paragenesis from a paragenesis with actinolite to a paragenesis with calcite and with absence of actinolite. Protholits of theses rocks were obtained through mineral chemistry, whole rock composition and paragenesis analysis, defining a metapelitic protholit for blueschist rocks and a metabasic protholit for greenschist rocks. According to P-T conditions, both rock types reached approximately the metamorphic peak at 9.2 kbar and 481°C, which corresponds to the transitional assemblage between greenschist to blueschist facies. Petrography provides evidence of retrogression with a slight overprint of a lower facies (greenschist). However, rocks preserve their peak assemblage, indicating a hairpin retrograde path. According to this path and to lithologic relations between the studied rocks, it was suggested an exhumation of serpentinite-subduction channel type |
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2017 |
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2017 |
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2020-06-10T16:38:43Z |
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2020-06-10T16:38:43Z |
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Trabajo de grado - Pregrado |
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http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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http://hdl.handle.net/1992/39911 |
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u807400.pdf |
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instname:Universidad de los Andes |
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reponame:Repositorio Institucional Séneca |
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http://hdl.handle.net/1992/39911 |
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u807400.pdf instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/ |
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eng |
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eng |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ |
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59 hojas |
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Universidad de los Andes |
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Geociencias |
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Facultad de Ciencias |
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Departamento de Geociencias |
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Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores.http://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Blanco Quintero, Idael3ca53113-e058-4b6d-9273-ea01b187f9c9400Rodríguez Vargas, Andrés Ignacio9ab03bcc-ab30-4928-a6c4-bb63a5816bc1500Carmona Mongua, Valentinaa7bcada9-d447-4103-bdf8-2bc0e322b421500Rojas-Agramonte, Yamirka2020-06-10T16:38:43Z2020-06-10T16:38:43Z2017http://hdl.handle.net/1992/39911u807400.pdfinstname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/Jambaló greenschist and blueschist are found in a metamorphic unit that belongs to the Arquía complex. Metamorphism of these rocks is associated with the subduction of the Proto-Caribbean under the South American plate. Age of metamorphism has been estimated by Bustamante (2008) with Ar-Ar method as Maastrichtian-Danian (67-61 Ma). Paragenesis of blueschist facies rocks is Glaucophane (Fe-glaucophane) + quartz + phengite + albite + epidote + chlorite (pycnochlorite) garnet, and paragenesis of greenschist facies rock is albite + quartz + chlorite (pycnochlorite) + calcite + epidote. Greenschist rocks have been altered by an infiltrating fluid with CO2, transforming the paragenesis from a paragenesis with actinolite to a paragenesis with calcite and with absence of actinolite. Protholits of theses rocks were obtained through mineral chemistry, whole rock composition and paragenesis analysis, defining a metapelitic protholit for blueschist rocks and a metabasic protholit for greenschist rocks. According to P-T conditions, both rock types reached approximately the metamorphic peak at 9.2 kbar and 481°C, which corresponds to the transitional assemblage between greenschist to blueschist facies. Petrography provides evidence of retrogression with a slight overprint of a lower facies (greenschist). However, rocks preserve their peak assemblage, indicating a hairpin retrograde path. According to this path and to lithologic relations between the studied rocks, it was suggested an exhumation of serpentinite-subduction channel typeLos esquistos azules y los esquistos verdes de Jambaló en una unidad metamórfica perteneciente al completo Arquía. El metamorfismo de estas rocas está asociado a la subducción del Proto-Caribe bajo la placa Suramericana. La edad de este metamorfismo, fue estimada por Bustamante (2008) mediante el método Ar-Ar como Maastrichtiense - Daniense (67-61 Ma). La paragénesis de las rocas en facies esquisto azul se compone de: Glaucofana (Fe-glaucofana) + cuarzo + fengita + albita + epidota + clorita (picnoclorita) + calcita + granate. Por otro lado, la paragénesis de las rocas en facies esquisto verde es albita + curazo + clorita (picnoclorita) + calcita + epidota. Además del proceso metamórfico, los esquistos verdes fueron alterados por una infiltración de fluidos con contenido de CO2, transformando la paragénesis original, con actinolita, a una paragénesis con calcita y sin presencia de actinolita. Los protolitos de estas rocas fueron obtenidos mediante el análisis de la química mineral, composición de roca total y paragénesis. De esta manera, se definió un protolito metapelítico para las rocas en facies de esquisto azul y uno metabásico para las rocas en facies de esquisto verde. Adicionalmente, de acuerdo a los resultados de las condiciones P-T, ambos tipos de roca alcanzaron, aproximadamente, el pico metamórfico en 9.2 kbar a 481°C, lo que corresponde a la zona transicional entre las condiciones de esquisto verde y esquisto azul. La petrografía provee evidencia de retrogresión con una superposición no total de una menor facies (esquisto verde). A pesar de este proceso, las rocas preservan la asociación de pico metamórfico, lo que indica una trayectoria retrograda de tipo -hairpin-. Según esta trayectoria y las relaciones litológicas de campo entre las rocas estudiadas, se sugiere una exhumación de tipo canal de subducción serpentinitizado.GeocientíficoPregrado59 hojasapplication/pdfengUniversidad de los AndesGeocienciasFacultad de CienciasDepartamento de Geocienciasinstname:Universidad de los Andesreponame:Repositorio Institucional SénecaPetrologic characterization and tectonic implications of blueschist and greenschist facies rocks of Jambaló, CaucaTrabajo de grado - Pregradoinfo:eu-repo/semantics/bachelorThesishttp://purl.org/coar/resource_type/c_7a1fhttp://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/TPGeología estructuralPetrologíaEsquistosGeocienciasPublicationTEXTu807400.pdf.txtu807400.pdf.txtExtracted texttext/plain69870https://repositorio.uniandes.edu.co/bitstreams/ad0bbea1-fdf2-4f96-8ffa-d1691fcb1e1d/download5e6c92b95f219d62084f026d3b5e7b16MD54ORIGINALu807400.pdfapplication/pdf3304506https://repositorio.uniandes.edu.co/bitstreams/c4a3f2c9-cd9a-4743-99ad-abe74e5a8d71/download3c4246ab175c70d2f6bae95a8667f08fMD51THUMBNAILu807400.pdf.jpgu807400.pdf.jpgIM Thumbnailimage/jpeg7913https://repositorio.uniandes.edu.co/bitstreams/002ae4f8-4580-4a82-b30a-fac528704665/download1be0b4cb5d1713d89e373a3dd408330aMD551992/39911oai:repositorio.uniandes.edu.co:1992/399112023-10-10 16:10:32.88http://creativecommons.org/licenses/by-nc-sa/4.0/open.accesshttps://repositorio.uniandes.edu.coRepositorio institucional Sénecaadminrepositorio@uniandes.edu.co |