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GeologyScience Repository: Recent submissions
Now showing items 21-40 of 41010
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(2006)Microthermometric and stable isotope studies of fluid inclusions were conducted for the Poongjeon talc deposit which formed as alteration products of calc-silicate minerals during the retrograde stage of contact metamorphism ...
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(2006)Ultramafic (mg# > 88) xenoliths from the Tertiary Veneto Volcanic Province (SE Apls, Italy) are characterized by variable depletion due to removal of a basaltic component and show significant trace element and isotopic ...
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(2006)Glass structures of obsidian and pumice samples were measured using electron diffraction. Amorphous, partly ordered, and nanocrystalline regions were distinguished and analysed separately. The deconvoluted atomic distances ...
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(2006)Talc deposits, located mainly in three areas of north-central Turkey, are present in the ophiolitic series of the Cretaceous and in siliciclastic rocks of the Paleocene. Talc deposits related to ophiolites are between ...
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(2006)Topaz-OH, phase egg, and δ-AIOOH are hydrous phases in the Al2O3-SiO2-H2O system that have been found to be stable at successively higher pressures up to those corresponding to the lower mantle, and thus they may be important ...
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(2006)Eight silicate unit vibrational modes were identified in a suite of PbO-SiO2 glasses using microreflectance Fourier Transform infrared (μR-FTIR) spectra that were transformed using the Kramers-Kronig relation. The transformed ...
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(2006)The dispersal of suspended matter in the Gulf of Cadiz (SW Spain) is related to its geographical position near the Strait of Gibraltar, and the continental margin, and to Atlantic and Mediterranean water flows and their ...
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(2006)Partitioning of Ni, Co and V between Cr-rich spinels and basaltic melt has been studied experimentally between 1150 and 1325 °C, and at controlled oxygen fugacity from the Co-CoO buffer to slightly above the hematite-magnetite ...
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(2006)Molecular dynamics simulations in combination with ab initio calculations were carried out to determine the rate of electron transfer at room temperature in bulk hematite (α-Fe2O3) and at two low-index surfaces, namely the ...
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(2006)The speciation of H2O in float glass (FG) and soda lime silica glass (SLS) was investigated using IR and NMR spectroscopy. Molar absorption coefficients for the near-infrared (NIR) combination bands at 4500 and 5200 cm- ...
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(2006)At longer periods, scattered ScS waves sometimes dominate over coda waves at large lapse times. Examining recordings of seismic envelopes at 9 IRIS seismic stations of regional earthquakes with focal depths deeper than 150 ...
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(2006)Carbon isotope fractionation factors reported for aerobic bacterial oxidation of CH4 (αCH4-CO2) range from 1.003 to 1.039. In a series of experiments designed to monitor changes in the carbon isotopic fractionation of CH4 ...
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(2006)The Xuelongbao plutonic complex in the eastern margin of the Tibetan Plateau is dated at 748 ± 7 Ma using the SHRIMP zircon U-Pb method and represents part of the Neoproterozoic igneous assemblage of South China. Rocks in ...
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(2006)New techniques which allow small amounts of Sr to be reliably analysed [G.R. Burton, V.I. Morgan, C.F. Boutron, K.J.R. Rosman, High-sensitivity measurements of strontium isotopes in polar ice, Anal. Chim. Acta 469 (2002) ...
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(2006)The geochemical partitioning of arsenic in organic-rich sediments from a contaminated wetland is examined using X-ray absorption spectroscopy and selective chemical extraction procedures, and evaluated in context to the ...
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(2006)New trace element and Hf, Nd, and Pb isotope data are reported for 22 basalts collected between 22°N and 35°N on the Mid-Atlantic Ridge. (La/Sm)N ratios identify the presence of enriched (E)-MORB in the northernmost part ...
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(2006)We have previously suggested that mobility patterns of P and Y in paleosols could serve as "organomarkers" to denote the presence of organic ligands secreted by terrestrial organisms on early Earth. In addition, our data ...
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(2006)The most recent eruptive cycle of Tungurahua volcano began in May 2004, and reached its highest level of activity in July 2004. This activity cycle is the last one of a series of four cycles that followed the reawakening ...
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(2006)This paper summarizes isotope fractionation mechanism, analytical method and applications in environmental geochemistry of calcium isotopes. Calcium isotopic composition can be used to constrain material sources and study ...
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(2006)The Min Jiang is a major headwater tributary of the Yangtze (Chang Jiang). Its source is in the undeveloped eastern Tibetan Plateau, but it flows through the heavily populated Sichuan (Four Rivers) Basin on its way to join ...
Now showing items 21-40 of 41010