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  • 1
    Call number: AWI G1-18-91727
    Type of Medium: Series available for loan
    Pages: IX, 219 S , graph. Darst. , 21 cm
    Series Statement: Schriften der Gesellschaft Deutscher Metallhütten- und Bergleute e. V. 23
    Language: German
    Note: Inhaltsverzeichnis: TEIL I: AUFSUCHUNG UND UNTERSUCHUNG. - I A. Vorbereitungen bis zur Ausreise. - 1. Der Auftrag und seine Bedingungen. - 2. Literatur-, Karten-, Sammlungs- und Archivstudien. - a) Lehr- und Handbücherauswahl. - b) Fachbibliotheken. - c) Geologische Landesämter und Geologische Dienste. - d) Übersichts-, Straßen- und Luftbildkarten. - e) Sammlungen von Instituten, Ämtern, Bergschulen, Museen und Firmen. - f) Firmen- und Behördenarchive. - g) Landeskunde. - 3. Wirtschaftliche Vorprüfung. - 4. Ausrüstung, Gepäck, Kleidung, Medikamente. - I B. Untersuchungen im Gelände. - 1. Transport. - 2. Befliegung. - 3. Ersterkundung von Einzelobjekten und Regionalprospektion. - a) Ersterkundung. - b) Regionalprospektion. - 4. Lagerstätten nutzbarer Minerale und Gesteine (Vorkommen, Nutzbarkeit, Verwendung). - a) Erze. - b) Industrieminerale (mit Preistabelle). - c) Nutzbare Gesteine (Steine und Erden). - I C. Untersuchungsmethoden. - 1. Topographische Aufnahme und geologische Kartierung. - 2. Bergmännische Aufschlüsse. - 3. Luminiszenz-Methoden. - 4. Geochemische Methoden. - 5. Chemische Untersuchung. - 6. Geophysik. - a) Geoelektrik. - b) Magnetik. - c) Radioaktivität. - d) Gravimetrie und Seismik. - e) Allgemeine Empfehlungen. - Literaturauswahl zu I C 6. - I D. Probenahme. - 1. Schlitzproben. - 2. Hackproben. - 3. Hand(Klaube)-Proben. - 4. Schußproben. - 5. Probenahme aus Schürfen. - 6. Bohrkern- und Bohrmehlproben. - Literaturauswahl zu I D. - I E. Auswertung der Analysenergebnisse. - 1. Analysen. - a) Wahrer Durchschnittswert. - b) Statistische Methoden. - Literaturauswahl zu I E 1. - 2. Hauptfaktoren der Wirtschaftlichkeit von Erzvorkommen. - 3. Einteilung und Berechnung von Lagerstättenvorräten. - a) Einteilung in Vorratsklassen. - b) Aussagesicherheit von Vorratsangaben. - c) Qualitative Ansprache der Vorräte. - d) Ermittlung der Parameter (veränderliche Faktoren) zur Vorratsberechnung. - e) Methoden der Vorratsberechnung und -schätzung. - Literaturauswahl zu E 3. - TEIL II: TECHNISCHE PLANUNG UND WIRTSCHAFTLICHE BEURTEILUNG. - II A. Technische Planung. - 1. Bergbauliche Planung. - 2. Aufbereitungsstudien. - Preistabelle der Metalle bzw. Erze. - 3. Standortplanung. - 4. Transportplanung. - II B. Die Beurteilung der wirtschaftlichen Nutzbarkeit von Minerallagerstätten. - 1. Vorbemerkung. - 2. Das Ergebnis wissenschaftlicher Lagerstättenuntersuchung als Voraussetzung für Kostenrechnungen. - 3. Die wirtschaftliche Bedeutung der Mengenangabe. - 4. Investitionskostenrechnung. - 5. Betriebskostenrechnung. - 6. Schlußbetrachtung. - Anhang zu Teil I und II: Bericht bzw. Gutachten (Schema). - ANLAGEN. - 1. Anschriften geologischer Dienste. - 2. Bezeichnung und Zusammensetzung von Gesteinen. - 2a.Magmatische Gesteine. - 2b. Sedimentgesteine und Metamorphe Gesteine. - 3. Zusammenhänge zwischen Lagerstätten, geologischen Großformen und Magmaten. - 4. Industrieminerale. - 5. Normen für Natursteine. - 5a. Natursteine. - 5b. Kalksorten. - 5c. Zemente. - 5d. Mörtel und Beton. - 5e. Ziegeleirohstoffe. - 5f. Sand und Kies. - 6. Fluoreszenz und Phosphoreszenz von Mineralen. - 7. Durchschnittsgehalte von Metallen in Gesteinen, Böden, Pflanzenaschen und Süßwasser. - 8. Angaben zur Bewertung und Analyse von Erzen. - 9. Deutsche und ausländische Prüfsieb-Gewebe-Normen. - 10. Geophysikalische Methoden. - 11. Suszeptibilitäten und elektr. Leitvermögen von Mineralen und Gesteinen. - 12a. Berechnungsbeispiel von Erzanalysen. - 12b. Beispiele für statistische Verteilungen. - 13. Richtwerte für die Größeneinteilung von Lagerstätten. - 14. Einteilung von Lagerstättenvorräten (Schema). - 15. Die Vorratsklassifikationen der UdSSR und USA. - 16. Aussagesicherheit von Vorratsangaben. - 17. Formeln für die Vorratsberechnung. - 18. Beispiel für die Untersuchung und die Berechnung der Vorräte einer Oolithischen Eisenerzlagerstätte. - 19. Formblatt für die Vorratsberechnung nach der Methode der Abbaublöcke. - 20. Formblatt für die Vorratsberechnung nach der Isohypsen-Methode. - 21. Beispiel für die Schätzung des Bauwürdigkeitskoeffizienten eines Chromit-Vorkommens. - 22. Handelsübliche Produkte aus Erzen und Mineralen.
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
    Publication Date: 2015-05-31
    Description: We develop and validate a systematic approach to infer plate boundary strength and rheological parameters in models of mantle flow from surface velocity observations. Based on a realistic rheological model that includes yielding and strain rate weakening from dislocation creep, we formulate the inverse problem in a Bayesian inference framework. To study the distribution of parameters that are consistent with the observations, we compute the maximum a posteriori (MAP) point, Gaussian approximations of the parameter distribution around that MAP point, and employ Markov Chain Monte Carlo (MCMC) sampling methods. The computation of the MAP point and the Gaussian approximation require first and second derivatives of an objective function subject to non-linear Stokes equations; these derivatives are computed efficiently using adjoint Stokes equations. We set up 2-D numerical experiments with many of the elements expected in a global geophysical inversion. This setup incorporates three subduction zones with slab and weak zone (interplate fault) geometry consistent with average seismic characteristics. With these experiments, we demonstrate that when the temperature field is known, we can recover the strength of plate boundaries, the yield stress and strain rate exponent in the upper mantle. When the number of uncertain parameters increases, there are trade-offs between the inferred parameters. These trade-offs depend on how well the observational data represents the surface velocities, and on the weakness of plate boundaries. As the plate boundary coupling drops below a threshold, the uncertainty of the inferred parameters increases due to insensitivity of plate motion to plate coupling. Comparing the trade-offs between inferred rheological parameters found from the Gaussian approximation of the parameter distribution and from MCMC sampling, we conclude that the Gaussian approximation—which is significantly cheaper to compute—is often a good approximation, in particular locally around the MAP point. Thus, the method can be applied to the global problem of inferring non-linear constitutive parameters and plate coupling factors for each subduction zone in a global geophysical inversion with known slab structure.
    Keywords: Geodynamics and Tectonics
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 3
    Publication Date: 2013-02-15
    Description: A new generation, parallel adaptive-mesh mantle convection code, Rhea, is described and benchmarked. Rhea targets large-scale mantle convection simulations on parallel computers, and thus has been developed with a strong focus on computational efficiency and parallel scalability of both mesh handling and numerical solvers. Rhea builds mantle convection solvers on a collection of parallel octree-based adaptive finite element libraries that support new distributed data structures and parallel algorithms for dynamic coarsening, refinement, rebalancing and repartitioning of the mesh. In this study we demonstrate scalability to 122 880 compute cores and verify correctness of the implementation. We present the numerical approximation and convergence properties using 3-D benchmark problems and other tests for variable-viscosity Stokes flow and thermal convection.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 4
    Publication Date: 2018-05-08
    Description: Author(s): P. Stadler, G. Rastelli, and W. Belzig We investigate the effects of local vibrational excitations in the nonsymmetrized current noise S ( ω ) of a nanojunction. For this purpose, we analyze a simple model—the Holstein model—in which the junction is described by a single electronic level that is coupled to two metallic leads and to a single... [Phys. Rev. B 97, 205408] Published Mon May 07, 2018
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 5
    Publication Date: 2017-01-21
    Description: Permafrost in high alpine catchments is expected to disappear in future warmer climates, but the hydrological impact of such changes is poorly understood. This paper investigates the flow paths and the hydrological response in a 5 km 2 high alpine catchment in the Ötztal Alps, Austria, and their changes resulting from a loss of permafrost. Spatial permafrost distribution, depth to the permafrost table and depth to the bedrock were mapped by geophysical methods. Catchment runoff and meteorological variables were monitored from June 2008 to December 2011. These data were used along with field experience to infer conceptual schemes of the dominant flow paths in four types of hillslopes that differ in terms of their unconsolidated sediment characteristics and the presence of permafrost. The four types are: talus fans, rock glaciers, Little Ice Age (LIA) till and Pre-LIA till. Permafrost tends to occur in the first three types, but is absent from Pre-LIA till. Based on these flow path concepts, runoff was simulated for present conditions and for future conditions when permafrost has completely disappeared. The simulations indicate that complete disappearance of permafrost will reduce flood peaks by up to 17% and increase runoff during recession by up to 19%. It is argued that change modeling needs to account for flow path types and their changes based on geophysical surveys and field investigations. This article is protected by copyright. All rights reserved.
    Print ISSN: 0043-1397
    Electronic ISSN: 1944-7973
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 6
    Publication Date: 1960-11-02
    Print ISSN: 0012-0189
    Topics: Geosciences
    Published by Schweizerbart
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  • 7
    Publication Date: 1997-04-01
    Print ISSN: 1365-1609
    Electronic ISSN: 1873-4545
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Elsevier
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