INVESTIGADORES
HALLER Miguel Jorge Francisco
artículos
Título:
First geochemical and geochronological characterization of Late Cretaceous mesosilicic magmatism in Gastre, Northern Patagonia, and its tectonic relation to other coeval volcanic rocks in the region
Autor/es:
ZAFFARANA C; LAGORIO S; ORTS D; SILVA NIETO D; GIACOSA R; RUIZ GONZÁLEZ V; BOLTSHAUSER B; PUIGDOMENECH NEGRE C; SOMOZA R; HALLER M
Revista:
GEOLOGICAL MAGAZINE
Editorial:
CAMBRIDGE UNIV PRESS
Referencias:
Lugar: Cambridge; Año: 2018
ISSN:
0016-7568
Resumen:
This work characterizes Late Cretaceous calc-alkaline volcanic rocks in Gastre, northern Patagonia, Argentina. These newly found porphyritic rocks bear 40Ar-39Ar amphibole age of ⁓ 74-76 Ma, a subduction type geochemical signature and a deep, garnet-bearing source. Extruded in a stage of low magmatic activity in the northern Patagonian Andes ( ⁓41°-44° S), they could represent an eastward migration of the Late Cretaceous magmatic arc that was associated with a regional compressive deformational stage in the South American margin.
