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Browsing ELibrary by Title
Now showing items 9640-9659 of 26297
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(2001)Measured values of mol fraction (X) and δ13C in the Fe(CO3)OH component of 49 samples of goethite (α-FeOOH) from a wide variety of environments range from 0.0015 to 0.0182 and from -21.7 to +3.3%%, respectively. The ...
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(2003)A detailed geochemical study of fluids from representative quartz-sealed faults hosting late Hercynian gold concentrations shows that fluids percolating the mineralised faults had two main distinct reservoirs: one was a ...
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(2006)Large karstic springs in east-central Florida, USA were studied using multi-tracer and geochemical modeling techniques to better understand groundwater flow paths and mixing of shallow and deep groundwater. Spring water ...
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(1989)The postsedimentation process of greatest extent in the ocean, occurring nearly everywhere, is mixing of the upper layer of bottom sediments by benthic organisms. The number of radioactive elements with steady fluxes into ...
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(2001)New biostratigraphic evidences from a core drilled in the central part of the 40 km diameter submarine Mjølnir meteorite crater on the Barents Shelf are presented. The data suggest a stratigraphical age for the meteorite ...
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(2000)During spiral growth of the calcite rhombohedron {1014}, divalent metals substituting for Ca2+ are differentially incorporated due to steric differences inherent to the asymmetric kink sites exposed at nonequivalent growth ...
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(2004)A study on Zn replacement in sphalerite by divalent Mn has been performed by using EPR spectroscopy. Twelve natural and synthetic samples with different Mn-contents were selected for the spectroscopic investigation. The ...
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(2004)The speciation of Mn, Fe, As, and Zn in a fast-growing (0.02mm/yr), shallow-marine, ferromanganese nodule has been examined by micro X-ray fluorescence, micro X-ray diffraction, and micro X-ray absorption spectroscopy. ...
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(2004)We have conducted a detailed study of the Mn-Cr systematics of the angrite D'Orbigny. Here, we report Cr isotopic abundances and Mn/Cr ratios in olivine, pyroxene, glass, chromite, and bulk rock samples from D'Orbigny. ...
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(2000)The crystal structure of a manganoan cummingtonite, composition ([M4])(Na0.13Ca0.41Mg0.46Mn1.00) 102,614(2)(n) from Talcville, New York, has been refined at high temperature using in situ neutron powder diffraction. The ...
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(1989)Study of the redox state of pelagic bottom sediments (red clays) is important to an understanding of the evolution of iron-manganese nodules in the ocean. There is now a large body of direct potentiometric measurements of ...
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(2006)The concentrations of the fluid mobile trace elements lithium, beryllium, boron, and barium were measured in samples of the altered matrix of several impactite breccias of the Yaxcopoil-1 drill core using secondary ion ...
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(2005)Surface ions move during the dissolution and growth of minerals. The present study investigates the density and the mobility of surface ions and the structure of the adsorbed water layer with changes in relative humidity ...
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(2006)Primary massive sulfide gossans (MSG) in the Bathurst Mining Camp (BMC), New Brunswick, Canada, are characterized by relative enrichment of Au, Sb, and As, formation of jarosite group minerals (jarosite, plumbojarosite, ...
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(2006)This study reports on the mobility and retention of trace elements in cassiterite tailings at the inactive Jumna mill, tropical north Queensland. Since the 1980s, the uncapped tailings have developed laterally discontinuous ...
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(1996)We have equilibrated carbon-saturated Fe-Ni-Co-S melts in a San-Carlos olivine matrix between 1350 and 1570°C at 2 GPa, to measure the median dihedral angles of metallic core melts in a silicate mantle matrix as a function ...
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(2001)Approximately 70,000 tons of slags, containing a high concentration of fine-grained carbon and heavy metals were accumulated in the town of Belovo (Kemerovo region, Russia) as a result of Zn-smelting between 1950 and 1994. ...
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(2002)This study investigates the effects of black shale weathering on the Re-Os isotope system, platinum group element concentrations and the degradation of organic matter. Samples from a weathering profile in Late Devonian ...
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(2000)Laboratory experiments were undertaken to study changes in concentrations of major inorganic ions during simulated burial of peats to about 1.5 km. Cladium, Rhizophora, and Cyrilla peats were first analyzed to determine ...
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(2002)The importance of mode coupling in a viscoelastic self-gravitating spherical earth with lateral variations in linear or nonlinear rheology is investigated with a finite-element model coupled to Poisson's equation. Both the ...
Now showing items 9640-9659 of 26297