Results 91 to 100 of about 87,697 (345)
Mineralogy and Petrology, 2014 Chemical and structural zoning in plagioclase can develop in response to a number of different magmatic processes. We examine plagioclase zonation formed during the transfer of plagioclase from a granodioritic host to a monzodioritic enclave to ...
A. Pietranik, J. Koepke
semanticscholar +1 more source
RioM‐1: A New Calcite Reference Material for U‐Pb LA‐ICP‐MS Geochronology
Geostandards and Geoanalytical Research, EarlyView.Key Points RioM‐1 calcite was characterised for trace elements, U‐Pb geochronology, Sr and O isotopes using ID‐TIMS, LA‐ICP‐MS and SIMS. U‐Pb dates from ID‐TIMS and LA‐ICP‐MS across several independent laboratories returned identical results within uncertainty.
Marco Silva +10 more
wiley +1 more source
Geostandards and Geoanalytical Research, EarlyView.Key Points Six new Ca‐Mg‐Fe carbonate reference materials are available to the global geochemical community for calibrating oxygen and carbon isotope ratios by SIMS. Significant compositional matrix effects were observed in the dolomite‐ankerite and magnesite‐siderite series during SIMS analysis. Compositional matrix effects correlate with Fe variation.
Maria Rosa Scicchitano +10 more
wiley +1 more source
Mechanism of Plagioclase Albitization
SEPM Journal of Sedimentary Research, 1992 ABSTRACT Observations of closely spaced porous and cemented sandstones from the San Joaquin basin, the Los Angeles basin and the Gulf Coast reveal that albitization of plagioclase occurs during fracturing of the detrital plagioclase grains.
Ramseyer, Karl +2 more
openaire +3 more sources
APG2: a New Version of APG, an Application for Amphibole-Plagioclase Geothermobarometry [PDF]
Journal of Sciences, Islamic Republic of Iran, 2016 APG2 is a computer application designed for amphibole-plagioclase geothermobarometry. It is the first updated version of APG and supports 4 thermometer models and 6 barometer models involving either amphibole-plagioclase or amphibole only.
M. Sayari
doaj
Degassing history of water, sulfur, and carbon in submarine lavas from Kilauea volcano, Hawaii [PDF]
, 1991 Major, minor, and dissolved volatile element concentrations were measured in tholeiitic glasses from the submarine portion (Puna Ridge) of the east rift zone of Kilauea Volcano, Hawaii.
Clague, David A. +2 more
core +1 more source
Journal of Metamorphic Geology, EarlyView.ABSTRACT Rutile provides a wealth of petrochronological information in metamorphic geology and due to its high stability during processes of the sedimentary cycle, rutile takes a special position in sedimentary provenance analysis. Besides being one of the classical minerals datable using the U–Pb system, rutile incorporates a broad range of trace ...
Jan Schönig +9 more
wiley +1 more source
Magmatic and Amygdaloidal Plagioclases [PDF]
Geological Magazine, 1955 AbstractThermal metamorphism of zeolites in amygdales of basaltic rocks is shown to give glomero-porphyroblastic aggregates of plagioclase crystals. Plagioclase phenocrysts in basic rocks are shown to undergo but little change during similar degrees of metamorphism.
openaire +2 more sources
Siberian flood basalt magmatism and Mongolia-Okhotsk slab dehydration [PDF]
, 2008 Experimental data combined with numerical calculations suggest that fast subducting slabs are cold enough to carry into the deep mantle a significant portion of the water in antigorite, which transforms with increasing depth to phase A and then to phase ...
Alexei V. Ivanov, Konstantin D. Litasov
core +1 more source
Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)
Journal of Metamorphic Geology, EarlyView.ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak +4 more
wiley +1 more source