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Now showing items 11808-11827 of 38944
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(2002)The effect that recent relief changes may have on the distribution of rock ages with elevation is investigated for a range of thermochronometers. From the solution of the heat transport equation in a crustal block undergoing ...
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(2000)This paper reviews the investigations that quantify metal-bacteria, organic-bacteria, and bacteria-mineral adsorption reactions. The studies are divided into the two main approaches used to quantify adsorption: bulk ...
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(1999)A method for analyzing low abundances of the platinum group elements (PGEs) and gold has been developed using cation exchange chromatography and ultrasonic nebulization inductively coupled plasma mass spectrometry (USN-ICP-MS). ...
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(2001)A series of five Cenozoic atmospheric general circulation model (AGCM) experiments has been performed using a new set of paleogeographic reconstructions for 55, 40, 33, 20 and 14 Ma. The five continental reconstructions ...
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QUANTIFYING THREE-DIMENSIONAL SILICATE FABRICS IN CUMULATES USING CUMULATIVE DISTRIBUTION FUNCTIONS (2004)We present a new method for quantifying three-dimensional silicate fabrics and the associated uncertainties from grain orientation data on three orthogonal sections. Our technique is applied to the orientation of ...
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(2003)A critical aspect of the debate about the origin and conditions of metamorphism of the Alpe Arami (AA) peridotite is the disagreement over how much ilmenite is contained in the older generation of olivine and therefore how ...
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(2002)Detrital modes are the basic type of quantitative data used in sedimentary petrology. They represent estimates of the petrographic framework composition of sand or sandstone obtained by point counting of thin sections. At ...
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(1998)Similar phases are recognized in the evolution of the artificial (based on foliage or fructifications) taxa of peltasperms and of the "natural" taxa of marine invertebrates. Apparently, this is due to the fact that in ...
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QUANTITATIVE ANALYSIS OF VARIATIONS IN DEPOSITIONAL SEQUENCE THICKNESS FROM SUBMARINE CHANNEL LEVEES (2002)Thickness variations across-levee and downchannel in acoustically defined depositional sequences from six submarine channel-levee systems show consistent and quantifiable patterns. The thickness of depositional sequences ...
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(1998)Indans and tetralins are considered biological markers (biomarkers). These C9-C11 hydrocarbons are present in small amounts in organic geological samples. Methyl substituted indans or tetralins may possess a stereogenic ...
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(2002)The luminescence spectrum of a mineral contains complex information related to the intrinsic crystal and the defect structure. For quantitative analysis of cathodoluminescence (CL) the spectra have to be deconvoluted by ...
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(2001)Microfocus computer tomography is a non-destructive technique enabling virtual slicing of opaque objects. Stacking several slices enables 3D visualisation of the object. To extract quantitative information, a thorough ...
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(1999)New fire-assay and tellurium coprecipitation methods were developed for precise determination of Ru, Rh, Pd, Ir, Pt, and Au in geological samples by using ICP-MS. High recovery (>97%) of those elements was obtained by ...
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(1997)X-ray photoelectron spectroscopy (XPS) analyses of Fe(III)ΣFe were calibrated with nine single crystals of biotite of known Fe(III)ΣFe content. Peak shape parameters for the component Fe2+ and Fe3+ Fe 3p peaks were obtained ...
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(1997)X-ray photoelectron spectroscopy (XPS) was used to determine Fe(III)ΣFe in individual biotite crystals in thin sections of ten metapelites and one syenite. The in situ XPS analyses of Fe(III)ΣFe in biotite crystals in the ...
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(2001)Water speciation in hydrous aluminosilicate glasses (with NaAlSi3O8, KAlSi3O8, LiAlSi3O8 and LiAlSi4O10 compositions) was studied with infrared (IR) and static ¹H nuclear magnetic resonance (NMR) spectroscopy. Using IR ...
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(PANGAEA, 1985-01-20)Based on estimate of Aurelia aurita concentration in the Black Sea from the Argus manned submersible in April-May 1984, as well as on author's data and published information on metabolic rate and feeding of medusa, biomass ...
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(2004)The presence of an unfilled 3d electron shell in the transition metals of the first series is manifested in X-ray self-absorption effects that cause distortions in the L emission spectra. In particular, one observes peak ...
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(2004)The results of a numerical modeling carried out for physical substantiation of possible geodynamic settings during the formation of the Earth's crust in the northeastern Baltic Shield are presented. The available data on ...
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(2001)Talbot (Journal of Structural Geology 21, 1535-1551, 1999b) introduced a new model for ductile shear zones as counterflow boundaries in pseudoplastic power-law fluids, and demonstrated that natural shear zones empirically ...
Now showing items 11808-11827 of 38944