Results 51 to 60 of about 704,528 (294)
The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina [PDF]
, 2019 The “Lomagundi-Jatuli event” corresponds to the most important δ13C positive anomaly (≥5‰) globally reported in Palaeoproterozoic marine carbonates (between ∼2.30 and 2.06 Ga).
Ballivian Justiniano, Carlos Alberto +6 more
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Metamorphic Rocks, Ireland [PDF]
Nature, 1880 THERE appears to be confusion as to the times when metamorphic action occurred among the Irish rocks; my experience would point to the following:—
openaire +2 more sources
Alpine metamorphism of mafic rocks
Schweizerische Mineralogische Und Petrographische Mitteilungen, 1974 Metamorphosed mafic rocks in the Alps exhibit many characteristic mineral assemblages. They are used to study different phases of alpine metamorphism. The great variety of alpine metamorphosed mafic and ultramafic rocks is illustrated with a map of their distribution (plate I) and a listing showing their localities, size and thickness, metamorphic ...
Dietrich, Volker +2 more
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Comparison between 2D and 3D microstructures and implications for metamorphic constraints using a chloritoid–garnet-bearing mica schist [PDF]
European Journal of MineralogyDespite the fact that rock textures depend on the 3D spatial distribution of minerals, our tectono-metamorphic reconstructions are mostly based on a 2D visualisation (i.e. thin sections).
F. Caso +6 more
doaj +1 more source
Early Cambrian U-Pb zircon age and Hf-isotope data from the Guasayán pluton, Sierras Pampeanas, Argentina: implications for the northwestern boundary of the Pampean arc [PDF]
, 2016 An Early Cambrian pluton, known as the Guasayán pluton, has been identified in the central area of Sierra de Guasayán, northwestern Argentina. A U?Pb zircon Concordia age of 533 ± 4 Ma was obtained by LA-MC-ICP-MS and represents the first report of ...
Alasino, Pablo Horacio +8 more
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JGEThe Kawatuna area has a complex geological structure and lithological condition of metamorphic rock, which is estimated to be a weak zone for hydrothermal solutions to rise and then accumulate as mineralization of veins in the metamorphic rock.
Asrafil Asrafil +4 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2014 Sulfides entering subduction zones can play an important role in the release of sulfur and metals to the mantle wedge and contribute to the formation of volcanic arc‐associated ores.
Fabio Giacometti +7 more
doaj +1 more source
Relationship between Brittleness Index and Crack Initiation Stress Ratio for Different Rock Types
Advances in Civil Engineering, 2020 Brittleness and crack initiation stress (σci) are important rock mechanical properties and intrinsically related to rock deformation and failure. We establish the relationship between σci and uniaxial tensile strength (σt) based on the Griffith stress ...
Juyu Jiang +3 more
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Kuangchan zonghe liyong, 2023 Wulashan Neoarchean peliticgneiss is exposed in the eclogite gneiss formation of Wulashan group in central Inner Mongolia. It is the most widely distributed plutonic metamorphic rock in Wulashan formation.
Yaxin Xu +5 more
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Phase Equilibria Modeling of Low-Grade Metamorphic Martian Rocks [PDF]
, 2018 We report on modeling low-grade (up to 300 °C) metamorphic reactions with Martian starting ...
Schwenzer, S. P. +2 more
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