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Mostrando ítems 11-20 de 127
U-Pb Geochronology and Hf-O Isotopes of zircons from the Pennsylvanian Coastal Batholith, South-Central Chile
(2014)
The Coastal Batholith of south-central Chile between latitudes 33° and 40°S is composed of calc-alkaline granitoids emplaced in a relatively restricted time period. New SHRIMP U-Pb zircon ages on eight quartzdioritic to ...
A combined zircon Hf isotope and whole-rock Nd and Sr isotopes study of Carboniferous A-type granites, Sierras Pampeanas of Argentina
(Pergamon-Elsevier Science Ltd, 2020-06)
We report new whole-rock Nd and Sr isotope data for two strongly peraluminous and one slightly peraluminous Carboniferous A-type granitic plutons in the eastern Sierras Pampeanas of Argentina. Our study also integrates ...
Hf and Nd isotopes in Early Ordovician to Early Carboniferous granites as monitors of crustal growth in the Proto-Andean margin of Gondwana
(Elsevier Science, 2013-05)
We report the first study integrating in situ U-Pb and Hf isotope data from magmatic zircon and whole-rock Sm-Nd isotope data for granitic rocks of the Sierras Pampeanas, Argentina, in order to evaluate the Palaeozoic ...
Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia
(2016)
Metasedimentary rocks in the Antarctic Peninsula and south-western Patagonia record detrital zircon evidence for significant Permian magmatic events along the Palaeo-Pacific margin of south West Gondwana. However, it is ...
Barren miocene granitoids in the central andean metallogenic belt, chile: geochemistry and nd-hf and u-pb isotope systematicsANDEAN GEOLOGY (PRINT)
(SERVICIO NACIONAL GEOLOGIA MINERVA, 2016)
The continental crust of northeastern patagoniaLa corteza continental del noreste de la patagonia
(Asociación Paleontológica Argentina, 2020-10)
The basement of northeastern Patagonia is characterized by Early Paleozoic igneous and metamorphic rocks that do not crop out in the central, western and Andean sectors of the North Patagonian Massif. A review of U-Pb ...
U–Pb ages and Hf-isotope data of detrital zircons from the late Neoarchean-Paleoproterozoic Minas Basin, SE Brazil
(Elsevier Science, 2017-02)
Because of its world-class iron ore deposits and promising Au and U mineralizations, the late Neoarchean to Paleoproterozoic Minas Basin (Minas Supergroup, SE of Brazil) is one of the best-studied basins in South America. ...
The pre-Mesozoic rocks of northern Chile: U-Pb ages, and Hf and O isotopes
(Elsevier, 2016)
Supposed pre-Mesozoic igneous and metamorphic rocks from northern Chile are reviewed in the light of twenty-one new SHRIMP U-Pb zircon age determinations. Metamorphic rocks from the precordillera upthrust belt mostly show ...
The Triassic–Cretaceous Tectonomagmatic History of the Antarctic Peninsula constrained by Geochronology, Thermochronology and Isotope Geochemistry
(2020)
This thesis presents new geochronological, thermochronological, geochemical and isotopic data from igneous and meta-igneous rock samples from the Antarctic Peninsula during the Mesozoic. This crustal block, part of West ...