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Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin
(Pergamon-Elsevier Science Ltd., 2014-08)
The Precordillera terrane (Cuyania) in western Argentina is commonly accepted as an exotic fragmentderived from Laurentia in the Early Paleozoic. Evidence supporting such an interpretation is manly basedon similarities in ...
Rochas Meta-Vulcânicas Máficas da Unidade Intermediária do Greenstone Belt de Riacho de Santana, Estado da Bahia: Estudo Petrográfico e Geoquímico
(Instituto de GeociênciasGeologiaPGGEOLOGIABrasil, 2017-06-28)
Na Plataforma Sul-Americana, inúmeros greenstone belts arqueanos (~ 2,9 a 3,2Ga) são identificados no Cráton do São Francisco, Estado da Bahia, entre eles destacam-se os de Riacho de Santana, Umburanas, Contendas Mirante ...
Ordovician klippen structures of the Sierra de Umango: New insights on Tectonic evolution of the Western Sierras Pampeanas, Argentina
(PERGAMON-ELSEVIER SCIENCE LTDOXFORD, 2012)
The basement rock of the Pampean flat-slab (Sierras Pampeanas) in the Central Andes was uplifted and rotated in the Cenozoic era. The Western Sierras Pampeanas are characterised by meta-igneous rocks of Grenvillian ...
Report on 1:250.000 Scale Geological and Metallogenic Maps Sierras de Las Minas, Chepes and Los Llanos Provincia de La Rioja
(Australian Geological Survey Organisation, 1997)
Geology
The map area covers most of the Sierras de Chepes, de Los Llanos and de Las Minas. The oldest rocks exposed are metasediments and meta-igneous rocks of the Olta Metamorphic Complex. The metasediments are interpreted ...
Caracterización geoquímica del magmatismo de arco Devónico y Carbonífero-Pérmico en el noroeste de Patagonia, ArgentinaGeochemical characterization of the Devonian and Carboniferous-Permian arc magmatism in northwest Patagonia, Argentina
(Asociación Geológica Argentina, 2015-10)
Sobre la base de análisis químicos incluyendo elementos mayores y trazas de 23 rocas ígneas del basamento cristalino del noroeste patagónico, provincias de Neuquén, Río Negro y Chubut, se caracteriza el magmatismo y ambiente ...