Geologie: Recent submissions
Anzeige der Dokumente 426-450 von 933
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Structural characteristics of the halite fabric type ‘Kristallbrocken’ from the Zechstein Basin with regard to its development
Küster, Yvonne;
; Schramm, Michael (International Journal of Earth SciencesInternational Journal of Earth Sciences, 2008)
The Kristallbrocken are a characteristic centimetre- to decimetre-sized, laminated halite fabric type occurring in the Stassfurt Formation in the Zechstein Basin. Up to now, the nature of the Kristallbrocken, i.e. if they ... -
Infiltration and groundwater flow into a fractured porous sandstone aquifer in the eastern Thuringian Basin
Rödiger, T.;; Büchel, G. (Grundwasser, 2009)
Kurzfassung Im Osten des Thüringer Beckens sind aufgrund der geringen Niederschläge von 585 mm/a die Grundwasserressourcen in den geklüfteten Buntsandsteingrundwasserleitern stark limitiert. Ziel der Untersuchung ... -
Mafic Late Miocene–Quaternary volcanic rocks in the Kamchatka back arc region: implications for subduction geometry and slab history at the Pacific–Aleutian junction
Volynets, Anna; Churikova, Tatiana;; Gordeychik, Boris; Layer, Paul (Contributions to Mineralogy and PetrologyContributions to Mineralogy and Petrology, 2009)
New 40Ar/39Ar and published 14C ages constrain voluminous mafic volcanism of the Kamchatka back-arc to Miocene (3–6 Ma) and Late Pleistocene to Holocene (<1 Ma) times. Trace elements and isotopic compositions show that ... -
The Sensitivity of Thermohaline Groundwater Circulation to Flow and Transport Parameters: A Numerical Study Based on Double-Diffusive Convection above a Salt Dome
(Transport in Porous Media, 2009)This article explores double-diffusive convective fluid motion in an aquifer above a salt dome. Aside from the ambient regional flow regime, the hydraulic conditions in an aquifer connected with a salt formation are ... -
Continuum-mechanical, Anisotropic Flow model for polar ice masses, based on an anisotropic Flow Enhancement factor
(Continuum Mechanics and ThermodynamicsContinuum Mechanics and Thermodynamics, 2009)A complete theoretical presentation of the Continuum-mechanical, Anisotropic Flow model, based on an anisotropic Flow Enhancement factor (CAFFE model) is given. The CAFFE model is an application of the theory of mixtures ... -
Grain-Size Control on Petrographic Composition of Sediments: Compositional Regression and Rounded Zeros
(Mathematical GeosciencesMathematical Geosciences, 2009)It is well-known that sediment composition strongly depends on grain size. A number of studies have tried to quantify this relationship focusing on the sand fraction, but only very limited data exists covering wider grain ... -
Shear modulus, heat capacity, viscosity and structural relaxation time of Na2O–Al2O3–SiO2 and Na2O–Fe2O3–Al2O3–SiO2 melts
(Physics and Chemistry of Minerals, 2010)The configurational heat capacity, shear modulus and shear viscosity of a series of Na2O–Fe2O3–Al2O3–SiO2 melts have been determined as a function of composition. A change in composition dependence of each of the physical ... -
Indicator Kriging without Order Relation Violations
(Mathematical GeosciencesMathematical Geosciences, 2008)Indicator kriging (IK) is a spatial interpolation technique aimed at estimating the conditional cumulative distribution function (ccdf) of a variable at an unsampled location. Obtained results form a discrete approximation ... -
Late-stage volcano geomorphic evolution of the Pleistocene San Francisco Mountain, Arizona (USA), based on high-resolution DEM analysis and 40Ar/39Ar chronology
(Bulletin of Volcanology, Vol. 72, Nr. 7, p. 833-846, 2010)The cone-building volcanic activity and subsequent erosion of San Francisco Mountain, AZ, USA, were studied by using high-resolution digital elevation model (DEM) analysis and new 40Ar/39Ar dating. By defining remnants or ... -
Sediments of the Ries Crater Lake (Miocene, Southern Germany).
(Schriftenreihe der deutschen Gesellschaft für Geowissenschaften, 2006)
This field trip is devoted to the post-impact history of the Nördlinger Ries with focus on its carbonate lake sediments. We will explore major facies belts of the Ries crater lake, including basinal shales, littoral carbonate ... -
Alpine architecture and kinematics of deformation of the northern Pelagonian nappe pile in the Hellenides
(Austrian Journal of Earth Sciences, 2010)Geological mapping and detailed structural investigations combined with geochronological and stratigraphic data, as well as fissiontrack age dating carried out on the northern part of the Pelagonian basement and the ... -
Integrale Quantifizierung von Schadstoffmassenflüssen im Grundwasser – Konditionierung der numerischen Inversion der Konzentrationsganglinien von Immissionspumpversuchen
(GrundwasserGrundwasser, 2008)Kurzfassung Auf dem Gelände eines ehemaligen Gaswerks (Testfeld Süd) wurden Immissionspumpversuche (IPVs) zur Quantifizierung der Fracht und der mittleren Konzentration gaswerkstypischer Schadstoffe entlang von drei ... -
Description of an aerodynamic levitation apparatus with applications in Earth sciences
; Kremer, Katrina; Albrecht, Nina; Simon, Klaus; Kronz, Andreas (Geochemical Transactions, 2010)
Background: In aerodynamic levitation, solids and liquids are floated in a vertical gas stream. In combination with CO2-laser heating, containerless melting at high temperature of oxides and silicates is possible. We ... -
Subgrain boundaries in Antarctic ice quantified by X-ray Laue diffraction
(Journal of Glaciology, 2011)Ice in polar ice sheets undergoes deformation during its flow towards the coast. Deformation and recrystallization microstructures such as subgrain boundaries can be observed and recorded using high-resolution light ... -
Metallic Iron Filters for Universal Access to Safe Drinking Water
; Schöner, Angelika; Woafo, Paul (CLEAN - Soil, Air, Water, 2009)
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Proximate causes of deforestation in the Bolivian lowlands: an analysis of spatial dynamics
Müller, Robert;; Schierhorn, Florian; Gerold, Gerhard; Pacheco, Pablo (Regional Environmental Change, 2011)
Forests in lowland Bolivia suffer from severe deforestation caused by different types of agents and land use activities. We identify three major proximate causes of deforestation. The largest share of deforestation is ... -
Testing the Suitability of Zerovalent Iron Materials for Reactive Walls
; Meinrath, Günther; ; Sauter, Martin; Merkel, B. J. (Environmental Chemistry, 2005)
Zerovalent iron (ZVI) has been proposed as reactive material in permeable in-situ walls for contaminated groundwater. An economically feasible ZVI reactive wall requires cheap but efficient iron materials. From an uranium ... -
Laboruntersuchungen zur Freisetzung von Unat aus einem Gestein unter oxischen naturnahen Bedingungen
; Sonnefeld, Jürgen; Sauter, Martin (Grundwasser, 2005)
Im Labor wurden verschiedene Größen (pH-Wert, HCO3 --Gehalt, Präsenz von Fe(OH)3) untersucht, von denen angenommen werden konnte, dass sie die umweltrelevante Freisetzung von Uran aus Gesteinen (z.B. Haufwerken, Halden, ... -
Lake Van, Eastern Anatolia, Hydrochemistry and History
(Aquatic GeochemistryAquatic Geochemistry, 2008)Saline, 450-m-deep Lake Van (Eastern Anatolia, Turkey) is, with 576 km3, the third largest closed lake on Earth and its largest soda lake. In 1989 and 1990, we investigated the hydrochemistry of the lake’s water column and ... -
Exploring the influence of operational parameters on the reactivity of elemental iron materials.
; Licha, T.; Scott, T. B.; Fall, M.; (Journal of hazardous materials, 2009-12-30)
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Comments on: “Decontamination of solutions containing EDTA using metallic iron” By Gyliene O. et al. [J. Hazard. Mater. (2008)]
(Journal of Hazardous Materials, 2009)
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Metallic iron for environmental remediation: learning from electrocoagulation.
; Schöner, A. (Journal of hazardous materials, 2010-03-15)
The interpretation of processes yielding aqueous contaminant removal in the presence of elemental iron (e.g. in Fe(0)/H(2)O systems) is subject to numerous complications. Reductive transformations by Fe(0) and its primary ... -
Evaluation of the effects of shaking intensity on the process of methylene blue discoloration by metallic iron.
; Kurth, A.-M. F.; (Journal of hazardous materials, 2009-09-30)
The term mixing (shaking, stirring, agitating) is confusing because it is used to describe mass transfer in systems involving species dissolution, species dispersion and particle suspension. Each of these mechanisms requires ...
