Boletín Geológico, 2019 Con el objetivo de ampliar el conjunto de materiales de referencia del Laboratorio de Geocronología del Servicio Geológico Colombiano (LG-SGC) se colectaron circones provenientes de la sienita nefelínica de San José del Guaviare, localidad del Jordán ...
Jimmy Alejandro Muñoz Rocha +7 more
doaj +1 more source
Mantle-like Sr-Nd isotope composition of Fe-K subalkaline granites : the Peneda-Gerês Variscan massif (NW Iberian Peninsula) [PDF]
, 2004 The Peneda-Gerês massif is one of the most representative NW Iberian late- to post-orogenic Variscan granitic plutons. It resulted essentially from the subsynchronous emplacement, at 290-296 Ma, of two granitic magmas of Fe-K subalkaline affinity, with ...
Bard +39 more
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Boletín Geológico, 2018 En este trabajo se presentan los primeros resultados de la implementación del Laboratorio de Datación U-Pb en el Servicio Geológico Colombiano con la técnica analítica LA-ICP-MS para datación U-Pb.
Mary Luz Peña Urueña +2 more
doaj +1 more source
Time span of the volcanic setting of the Neves-Corvo VHMS deposit [PDF]
, 2015 Resumo ...
Araújo, Vítor +7 more
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Contribution of Sm-Nd and Rb-Sr isotope systems to the petrogenetic study of the peraluminous two-mica granite pluton in Oporto town (NW Portugal) [PDF]
, 2014 O Granito do Porto corresponde a um granito hercínico, leucocrata, de duas micas, fortemente peraluminoso. No presente trabalho foram realizadas análises para os sistemas isotópicos Rb-Sr e Sm-Nd, em cinco amostras frescas do granito em estudo ...
Almeida, A., Noronha, F., Santos, J. F.
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Anais da Academia Brasileira de Ciências, 2003 The integrated investigation of metamorphism and zircon U-Pb SHRIMP geochronology of the Belizário ultramafic amphibolite from southernmost Brazil leads to a better understanding of the processes involved in the generation of the Encantadas Complex ...
Léo A. Hartmann +4 more
doaj +1 more source
Revisão estratigráfica das unidades superiores da faixa paraguai norte : litoestratigrafia, quimioestratigrafia (C e Sr) e geocronologia (U-Pb). Mato Grosso, Brasil [PDF]
, 2019 Dissertação (mestrado)—Universidade de Brasília, Instituto de Geociências, Pós-Graduação em Geologia, 2015. ; A Faixa Paraguai contém registros dos eventos glaciais globais Neoproterozóicos, incluindo sedimentação que avançou até o limite Neoproterozóico-Cambriano Inferior.
openaire +2 more sources
Rare earth element and yttrium geochemistry applied to the genetic study of cryolite ore at the Pitinga Mine (Amazon, Brazil) [PDF]
, 2008 This work aims at the geochemical study of Pitinga cryolite mineralization through REE and Y analyses in disseminated and massive cryolite ore deposits, as well as in fluorite occurrences.
Andrade, Sandra +5 more
core +3 more sources
A Paleoproterozoic intra-arc basin associated with a juvenile source in the Southern Brasilia Orogen : application of U-Pb and Hf-Nd isotopic analyses to provenance studies of complex areas [PDF]
, 2016 A. Westin and M.C. Campos Neto acknowledge support from São Paulo Research Foundation (FAPESP) through grants 2011/13311-9, 2013/13530-8 and 2013/19095-1. A. Westin is a grant holder at FAPESP and M. C. Campos Neto is a CNPq researcher. P. A.
Cawood, Peter Anthony +5 more
core +3 more sources