Extent and character of early tertiary penetrative deformation, Sonora, Northwest Mexico [PDF]
Reconnaissance field work has led to the recognition of extensive Early Tertiary gneiss and schist which are distinguished by weakly developed to highly conspicous northeast to east-trending stretching lineation commonly accompanied by low-dipping ...
Anderson, T. H.
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Electron microprobe monazite geochronology of granitic intrusions from the Montes de Toledo batholith (central Spain) [PDF]
, 2012 U–Th–Pb monazite dating by electron microprobe has been applied to three peraluminous granitic intrusions of the western Montes de Toledo batholith (MTB).
Cuesta, Andrés +4 more
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First U–Pb SHRIMP age of the Hauterivian stage, Neuquén Basin, Argentina
Journal of South American Earth Sciences, 2008 Fil: Aguirre Urreta, Maria Beatriz. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales.
Aguirre-Urreta, M. Beatriz +4 more
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Geologica Carpathica, 2014 The main products of volcanic activity in the teschenite-picrite association (TPA) are shallow, sub-volcanic intrusions, which predominate over extrusive volcanic rocks.
Szopa Krzysztof +2 more
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Filling the Gap: New Precise Early Cretaceous Radioisotopic Ages from the Andes [PDF]
, 2015 Two tuffs in the Lower Cretaceous Agrio Formation, Neuquén Basin, provided U–Pb zircon radioisotopic ages of 129.09 ± 0.16 Ma and 127.42 ± 0.15 Ma.
Aguirre-Urreta +27 more
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Late Paleozoic oxygenation of marine environments supported by dolomite U-Pb dating
Nature CommunicationsUnderstanding causal relationships between evolution and ocean oxygenation hinges on reliable reconstructions of marine oxygen levels, typically from redox-sensitive geochemical proxies.
Michal Ben-Israel +5 more
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New U-Pb zircon ages for Early Ordovician magmatism in Central Portugal [PDF]
, 2013 The Mundão anatectic complex is located in the axial zone of the Iberian massif of Central Northern Portugal (Central Iberian Zone). It consists of lenticular bodies of felsic gneisses and stromatic metatexites derived from metasedimentary protoliths ...
Azevedo, M.R. +4 more
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Discovery of an albite gneiss from the Ile de Groix (Armorican Massif, France): geochemistry and LA-ICP-MS U-Pb geochronology of its Ordovician protolith [PDF]
, 2018 For the first time, an albite orthogneiss has been recognised and dated within the HP-LT blueschist facies metabasites and metapelites of the Ile de Groix.
Ballèvre, Michel +4 more
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Linking sedimentary phosphate U-Pb ages to syn-sedimentary processes [PDF]
Goldschmidt2021 abstracts, 2021 Gary O'Sullivan +8 more
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U-Pb ages of granites near the Grenville Front, Ontario
, 1994 U-Pb ages are reported for three plutons near the Grenville Front. Coarse granite from the Chief Lake complex in the Southern Province has a zircon age of 1464+2/-1 Ma. Biotite granodiorite from a small, separate pluton just north of the Chief Lake complex has a crystallization age of 1749+12/-8 Ma, based on analyses of igneous titanite.
A Davidson, O van Breemen
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