Geology of the southern part of Sabanalarga Batholith. Implications for terrane theory in the west of Colombia
Document identifier: oai:DiVA.org:ltu-76273
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10.15446/rbct.n38.46367Keyword: Natural Sciences,
Earth and Related Environmental Sciences,
Geology,
Naturvetenskap,
Geovetenskap och miljövetenskap,
Geologi,
Sabanalarga Batholith,
Barroso Formation,
Terranes Theory,
Cauca-Almaguer Fault System,
Batolito de Sabanalarga,
Formación Barroso,
Teoría de Terrenos,
Sistema de fallas Cauca-AlmaguerPublication year: 2015Abstract: The Colombian Andes are the product of the interaction of terranes with different geological affinity, such as the Western Cordillera, which is made up of blocks of oceanic affinity, that have been accreted to the western boundary of pre-existing terranes with continental affinity. The study area is geologically dominated by the Sabanalarga Batholith, which has at least two facies, gabro-diorite and tonalitie-granodiorite, that intrude the Barroso Formation. Both units have been affected strongly by regional faults generating large areas of mylonites closely related with hydrothermal alterations and mineralization occurrences. Due the clear intrusive relationship between the Sabanalarga Batholith and Barroso Formation, and due the Cauca-Almaguer fault cuts both units without separating them, it is suggested that the Terranes Theory must be reconsidered in this part of the country, because the Cauca-Almaguer fault do not correspond to the boundary between Calima Terrane and the terranes Arquía and Quebradagrande.
Abstract: Los Andes Colombianos son el producto de la interacción de terrenos de diferente afinidad geológica, como la Cordillera Occidental, conformada por bloques de afinidad oceánica acrecionados al límite occidental de terrenos preexistentes de afinidad continental. La zona de estudio está dominada geológicamente por el Batolito de Sabanalarga, el cual presenta al menos dos facies, una gabróica-diorítica y una tonalítica-granodiorítica, que intruyen a la Formación Barroso. Ambas unidades se presentan intensamente afectadas por fallas regionales, dando origen a extensas zonas de milonitas íntimamente relacionadas con mineralizaciones y alteraciones hidrotermales. Dada la clara relación intrusiva entre el Batolito de Sabanalarga y la Formación Barroso, y que la Falla Cauca-Almaguer corta a ambas unidades sin separarlas, se sugiere que la Teoría de Terrenos debe ser replanteada en esta parte del país, pues la falla Cauca-Almaguer no correspondería al límite entre el Terreno Calima y los Terrenos Arquía y Quebradagrande.
Authors
Juan Sebastian Guiral Vega
Facultad de Minas, Universidad Nacional de Colombia, Medellín, Colombia
Other publications
>>
Jonathan Rincon
Facultad de Minas, Universidad Nacional de Colombia, Medellín, Colombia
Other publications
>>
Oswaldo Ordoñez-Carmona
Facultad de Minas, Universidad Nacional de Colombia, Medellín, Colombia
Other publications
>>
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header:
identifier: oai:DiVA.org:ltu-76273
datestamp: 2021-04-19T12:36:07Z
setSpec: SwePub-ltu
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recordContentSource: ltu
recordCreationDate: 2019-10-07
identifier:
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76273
10.15446/rbct.n38.46367
titleInfo:
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lang: spa
title: Geology of the southern part of Sabanalarga Batholith. Implications for terrane theory in the west of Colombia
abstract:
The Colombian Andes are the product of the interaction of terranes with different geological affinity such as the Western Cordillera which is made up of blocks of oceanic affinity that have been accreted to the western boundary of pre-existing terranes with continental affinity. The study area is geologically dominated by the Sabanalarga Batholith which has at least two facies gabro-diorite and tonalitie-granodiorite that intrude the Barroso Formation. Both units have been affected strongly by regional faults generating large areas of mylonites closely related with hydrothermal alterations and mineralization occurrences. Due the clear intrusive relationship between the Sabanalarga Batholith and Barroso Formation and due the Cauca-Almaguer fault cuts both units without separating them it is suggested that the Terranes Theory must be reconsidered in this part of the country because the Cauca-Almaguer fault do not correspond to the boundary between Calima Terrane and the terranes Arquía and Quebradagrande.
Los Andes Colombianos son el producto de la interacción de terrenos de diferente afinidad geológica como la Cordillera Occidental conformada por bloques de afinidad oceánica acrecionados al límite occidental de terrenos preexistentes de afinidad continental. La zona de estudio está dominada geológicamente por el Batolito de Sabanalarga el cual presenta al menos dos facies una gabróica-diorítica y una tonalítica-granodiorítica que intruyen a la Formación Barroso. Ambas unidades se presentan intensamente afectadas por fallas regionales dando origen a extensas zonas de milonitas íntimamente relacionadas con mineralizaciones y alteraciones hidrotermales. Dada la clara relación intrusiva entre el Batolito de Sabanalarga y la Formación Barroso y que la Falla Cauca-Almaguer corta a ambas unidades sin separarlas se sugiere que la Teoría de Terrenos debe ser replanteada en esta parte del país pues la falla Cauca-Almaguer no correspondería al límite entre el Terreno Calima y los Terrenos Arquía y Quebradagrande.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Natural Sciences
Earth and Related Environmental Sciences
Geology
@attributes:
lang: swe
authority: uka.se
topic:
Naturvetenskap
Geovetenskap och miljövetenskap
Geologi
@attributes:
lang: eng
topic: Sabanalarga Batholith
@attributes:
lang: eng
topic: Barroso Formation
@attributes:
lang: eng
topic: Terranes Theory
@attributes:
lang: eng
topic: Cauca-Almaguer Fault System
@attributes:
lang: spa
topic: Batolito de Sabanalarga
@attributes:
lang: spa
topic: Formación Barroso
@attributes:
lang: spa
topic: Teoría de Terrenos
@attributes:
lang: spa
topic: Sistema de fallas Cauca-Almaguer
language:
languageTerm: spa
genre:
publication/journal-article
ref
note:
Published
3
Research article in Spanish
name:
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type: personal
namePart:
Guiral Vega
Juan Sebastian
role:
roleTerm: aut
affiliation: Facultad de Minas Universidad Nacional de Colombia Medellín Colombia
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type: personal
authority: ltu
namePart:
Rincon
Jonathan
1991-
role:
roleTerm: aut
affiliation: Facultad de Minas Universidad Nacional de Colombia Medellín Colombia
nameIdentifier:
jonrin
0000-0001-8751-4116
@attributes:
type: personal
namePart:
Ordoñez-Carmona
Oswaldo
role:
roleTerm: aut
affiliation: Facultad de Minas Universidad Nacional de Colombia Medellín Colombia
originInfo:
dateIssued: 2015
relatedItem:
@attributes:
type: host
titleInfo:
title: Boletín Ciencias de la Tierra
identifier:
0120-3630
2357-3740
part:
detail:
@attributes:
type: issue
number: 38
extent:
start: 41
end: 48
location:
url: https://revistas.unal.edu.co/index.php/rbct/article/view/46367
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form: print
typeOfResource: text