Título:
Petrologic features of mesoproterozoic lamprophyric dykes from Montevideo (Piedra Alta terrane, South Uruguay)
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Compilador:
Autor:
Muzio Sauer, Rossana
Martino Rivero, Natalia
Peel Canabal, Elena
Martino Rivero, Natalia
Peel Canabal, Elena
Tutor:
Tipo de documento:
Artículo
Editor:
Palabras clave:
Lamprófidos
Petrología
Geocronología
Petrología
Geocronología
Descriptores:
Año de publicación:
2021
Contenido:
Resumen:
Mafic dykes of lamprophyric affinity cropping out along the coastal area of Montevideo city are described. These dykes trend N75º-85º and crosscut 2.1 Ga Paleoproterozoic metamorphic units of the Rio de la Plata craton. They show mainly porphyritic textures with phlogopite and clinopyroxene macrocrysts in a groundmass composed of carbonates, phlogopite, augite, and feldspathoids. Ocellar structures filled with leucite, carbonates, and fibrous alkaline amphibole are present. The mineralogical assembly allows their classification as lamprophyres (minettes), but according to their chemical nature, they can be classified as alkaline lamprophyres. A crystallization age of 1.42 Ga by Ar-Ar method (on biotite/phlogopite) was obtained.
Descripción:
metadata.articulos.dc.description.uri:
Editorial:
Universidad Nacional de Colombia
EN:
Earth Sciences Research Journal, 2021, 25(2): 157-168
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Citación:
Muzio Sauer, R, Martino Rivero, N y Peel Canabal, E. "Petrologic features of mesoproterozoic lamprophyric dykes from Montevideo (Piedra Alta terrane, South Uruguay)". Earth Sciences Research Journal. [en línea] 2021, 25(2): 157-168. 12 h. DOI: 10.15446/esrj.v25n2.89652
Citación:
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ISBN:
e-ISBN:
ISSN:
2339-3459
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Cobertura geográfica:
Uruguay
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Departamento académico:
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Licencia:
Licencia Creative Commons Atribución (CC - By 4.0)
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| 1015446esrjv25n289652.pdf | — | 6.37 MB | Adobe PDF |