Geochemistry, Geophysics, Geosystems, 2020 Major, trace, and isotopic compositions of plagioclase megacrysts from plagioclase ultraphyric basalts (PUB) from multiple mid‐ocean ridges were determined to characterize the liquid compositions from which they were derived.
Roger L. Nielsen +4 more
doaj +2 more sources
Syn-kinematic hydration reactions, grain size reduction, and dissolution–precipitation creep in experimentally deformed plagioclase–pyroxene mixtures [PDF]
Solid Earth, 2018 It is widely observed that mafic rocks are able to accommodate high strains by viscous flow. Yet, a number of questions concerning the exact nature of the involved deformation mechanisms continue to be debated.
S. Marti +5 more
doaj +2 more sources
Elasticity of plagioclase feldspars [PDF]
Journal of Geophysical Research: Solid Earth, 2016 AbstractElastic properties are reported for eight plagioclase feldspars that span compositions from albite (NaSi3AlO8) to anorthite (CaSi2Al2O8). Surface acoustic wave velocities measured using Impulsive Stimulated Light Scattering and compliance sums from high‐pressure X‐ray compression studies accurately determine all 21 components of the elasticity ...
J. Michael Brown +3 more
openaire +3 more sources
Miarolitic cavities in rapakivi granite on Hästholmen, Loviisa, southeastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1987 Miarolitic cavities are described from drill cores taken from rapakivi granite on Hästholmen, an island about 80 km east of Helsinki. The distribution of cavities between different textural types of rapakivi seems to favour the equigranular medium to ...
K. Lindqvist, V. Suominen
doaj +1 more source
Hydrogen incorporation in plagioclase [PDF]
Geochimica et Cosmochimica Acta, 2020 We conducted experiments at high pressure (P) and temperature (T) to measure hydrogen solubility in plagioclase (Pl) with a range of compositions (An15 to An94). Experiments were run at 700-850 °C, 0.5 GPa, and f O 2 close to either the Ni-NiO (NNO) or iron-wüstite (IW) oxygen buffers.
Jed L. Mosenfelder +4 more
openaire +2 more sources
Partitioning of barium between coexisting K-feldspars and plagioclase in the Bushveld granites from the Zaaiplaats area, South Africa [PDF]
Bulletin of the Geological Society of Finland, 1984 The barium contents of the coexisting K-feldspars and plagioclases in the Bushveld granites from the Zaaiplaats tin mine area were determined by electron microprobe analyses.
J.T. Ollila
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Записки Горного института, 2022 The paper discusses the geochemistry of major (EPMA) and trace (SIMS) elements in olivine of porphyritic, nonporphyritic chondrules, and the matrix of equilibrated ordinary chondrite Saratov (L4).
Kristina G. Sukhanova +2 more
doaj +1 more source
Journal of Economic Geology, 2023 The Zanjan-Takab complex is a metamorphic belt with NW-SE trend that includes gneiss, amphibolite and gneissic amphibolite, old metagranites, pelitic schists with migmatites and metaophiolites.
Haleh Ghorbani +2 more
doaj +1 more source
Petrology, geochemistry, source and tectonic setting of Malek Chah Ruii granitoid (East of Lut Block) [PDF]
پترولوژی, 2021 The Malek Chah Rouii granitoid pluton is exposed within the Deh-Salm metamorphic complex in the eastern margin of the Lut zone. The studied granitoid with peraluminous and calc-alkaline nature is composed of tonalite, granodiorite, and granite (monzo ...
Abadullah Toulabi Nejad +4 more
doaj +1 more source
Geophysical Monograph Series, Page 263-304., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside +3 more
wiley +3 more sources