Global ETD Search
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Showing 1 to 8 of 8 for “"X-ray Mapping"”.
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Paleoclimate reconstructions over the last century from a tropical speleothem on Niue Island, South Pacific
… element profiles accompanied by trace element X-ray mapping were used to test the validity of ENSO-controlled hydroclimate and tropical cyclones archived in the stalagmite. The results show that interannual variability in the stalagmite d18O and d13C time series agrees well with …
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PRESSURE-TEMPERATURE EVOLUTION OF METAPELITES WITHIN THE ANACONDA METAMORPHIC CORE COMPLEX, SOUTHWESTERN MONTANA
… MnO as a component in the model system. X-ray mapping of garnet within metapelites indicate only one growth phase. Petrographic analysis in conjunction with pseudosections reveal peak metamorphism occurred at 3.3-5.3 kbars and 590-665°C with an assemblage of biotite + garnet + sillimanite + …
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PRESSURE-TEMPERATURE EVOLUTION OF METAPELITES WITHIN THE ANACONDA METAMORPHIC CORE COMPLEX, SOUTHWESTERN MONTANA
… MnO as a component in the model system. X-ray mapping of garnet within metapelites indicate only one growth phase. Petrographic analysis in conjunction with pseudosections reveal peak metamorphism occurred at 3.3-5.3 kbars and 590-665°C with an assemblage of biotite + garnet + sillimanite + …
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Microstructural And Mechanical Characterization Of Al-al2o3 Nanocomposites Synthesized By High-energy Milling
… powders by scanning electron microscopy and X-ray mapping. The energy dispersive spectroscopy and X-ray diffraction techniques were employed to determine the composition and phase analysis, respectively. The milled powders were then consolidated for subsequent mechanical characterization by (i) …
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Making oceanic plagiogranite bodies by thermal migration: evidence from the Agros transect, Troodos ophiolite, Cyprus
… Agros). Major and trace element analysis and x-ray mapping were used to characterize the samples. Fe and Si isotopic ratios were measured by HR-MC-ICPMS. Results show both isotopic systems become heavier with increasing whole rock SiO2 wt. % and with increasing distance from gabbros toward the …
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Long-term desorption behavior of uranium and neptunium in heterogeneous volcanic tuff materials
… from volcanic tuff was compared using Extended X-ray Adsorption Fine Structure (EXAFS) measurements. To complement the EXAFS, Electron Probe Microanalysis and x-ray mapping of similar samples was used to probe uranium spatial distributions and elemental associations within the volcanic tuff. The …
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Understanding the evolution of compositional zoning in San Juan Volcanic Field ignimbrites using iron isotope ratios
… are from Lipman and McIntosh, 2008). Detailed X-ray mapping and compositional analysis were performed; compositions range from andesite to rhyolite, and granodiorite to aplite. Fe was purified from dissolved whole rock samples and analyzed for isotopic ratios using a high resolution MC-ICPMS. …