Granitic landscape in the Munro Pluton (Tapera de Burgos), province of Chubut, Patagonia, Argentina

The Munro Pluton is located in the extra-Andean region of the province of Chubut, Argentina, in northern Patagonia, northeast of the Sierra de Tecka and northwest of the Sierra de Languineo. It is a sub-volcanic pluton with a SHRIMP age of 60 Ma (Paleocene?). Studies of fission tracks on apatites of...

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Autores principales: Aguilera, Emilia Yolanda, Reato, Agustina, Martínez, Oscar, Aragón, Eugenio, Rabassa, Jorge Oscar
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Geología
Munro Pluton
Patagonia
Argentina
Granitic landscape
Fractures
Weathering
Paisaje granítico
Fracturas
Meteorización
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126326
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126326
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Munro Pluton
Patagonia
Argentina
Granitic landscape
Fractures
Weathering
Paisaje granítico
Fracturas
Meteorización
spellingShingle Geología
Munro Pluton
Patagonia
Argentina
Granitic landscape
Fractures
Weathering
Paisaje granítico
Fracturas
Meteorización
Aguilera, Emilia Yolanda
Reato, Agustina
Martínez, Oscar
Aragón, Eugenio
Rabassa, Jorge Oscar
Granitic landscape in the Munro Pluton (Tapera de Burgos), province of Chubut, Patagonia, Argentina
topic_facet Geología
Munro Pluton
Patagonia
Argentina
Granitic landscape
Fractures
Weathering
Paisaje granítico
Fracturas
Meteorización
description The Munro Pluton is located in the extra-Andean region of the province of Chubut, Argentina, in northern Patagonia, northeast of the Sierra de Tecka and northwest of the Sierra de Languineo. It is a sub-volcanic pluton with a SHRIMP age of 60 Ma (Paleocene?). Studies of fission tracks on apatites of the studied region suggest that the exhumation of the region took place during the Paleogene, indicating that the lapse since its emplacement until its exhumation, took less than 35 Ma, and that the pluton has been exposed to weathering at least since the Miocene until present times. This pluton has ellipsoidal shape and a surface of 25 km2 and it is intruded by two dyke systems. The Munro Pluton develops a landscape whose weathering front exposes fresh rocks, regolith zones and boulders immersed in regolith. Granitic landforms have been recognized at different scales. Among the bigger landforms of the granitic landscape, the following have been identified: domes (bornhardts), nubbins, koppies and smaller landforms such as boulders, flared slopes, gnammas, rills/gutters/gullies, tafoni and pseudo-bedding. Structural and textural observations allowed the inference that many of the identified landforms are generated in the sub-soil, being followed by the regolith mobilization thus exposing the paleo-weathering front. Other landforms have a tectonic component associated for their development, such as pseudo-bedding, as well as the endogenous deformations, related to the emplacement type of the Munro pluton. In general, most of the landforms are convergent as they evolve along different pathways.
format Articulo
Articulo
author Aguilera, Emilia Yolanda
Reato, Agustina
Martínez, Oscar
Aragón, Eugenio
Rabassa, Jorge Oscar
author_facet Aguilera, Emilia Yolanda
Reato, Agustina
Martínez, Oscar
Aragón, Eugenio
Rabassa, Jorge Oscar
author_sort Aguilera, Emilia Yolanda
title Granitic landscape in the Munro Pluton (Tapera de Burgos), province of Chubut, Patagonia, Argentina
title_short Granitic landscape in the Munro Pluton (Tapera de Burgos), province of Chubut, Patagonia, Argentina
title_full Granitic landscape in the Munro Pluton (Tapera de Burgos), province of Chubut, Patagonia, Argentina
title_fullStr Granitic landscape in the Munro Pluton (Tapera de Burgos), province of Chubut, Patagonia, Argentina
title_full_unstemmed Granitic landscape in the Munro Pluton (Tapera de Burgos), province of Chubut, Patagonia, Argentina
title_sort granitic landscape in the munro pluton (tapera de burgos), province of chubut, patagonia, argentina
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/126326
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