Geologie: Recent submissions
Anzeige der Dokumente 61-85 von 931
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Elastic deformation plays a non-negligible role in Greenland’s outlet glacier flow
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Future projections of global mean sea level change are uncertain, partly because of our limited understanding of the dynamics of Greenland’s outlet glaciers. Here we study Nioghalvfjerdsbræ, an outlet glacier of the Northeast ... -
Rare Holocene sediment deposits from Sodmein Playa (Eastern Desert, Egypt)—Stratigraphic assessment and environmental setting
; ; ; ; ; ; ; (Geoarchaeology, 2022-11-12)
Sodmein Playa is one of the rare Pleistocene open‐air sites in the Eastern Desert of Egypt. Based on the associated stone artefact material, it could be assigned to the Middle Stone Age/Last Interglacial. However, it has ... -
Fine‐Sediment Erosion and Sediment‐Ribbon Morphodynamics in Coarse‐Grained Immobile Beds
; (Water Resources Research, 2022-11-14)
In rivers, fine sediments are often transported over immobile coarse grains. With low sediment supply, they tend to aggregate in longitudinal ribbons. Yet, the long‐term evolution of such ribbons and the influence of ... -
An exceptional sedimentary record of initial rifting on the East African Plateau in the Miocene: Lessons from depositional cyclicity and palaeoenvironmental proxies
; ; ; (The Depositional Record, 2022-11-20)
Knowledge about the initial tectonic and depositional dynamics, as well as the influence of early rifting on climate and environmental evolution remains speculative to a large extent, because sediments are usually deeply ... -
Anmerkungen zur Auswertung von Pumpversuchen mit artesischen Brunnen
(2010)Die Auswertung von Pumpversuchen mit konstantem Wasserspiegel, insbesondere Auslaufversuche an artesischen Brunnen, ist kein Standardverfahren in der Hydrogeologie. Da in Europa in Folge zurück gehender Grundwassernutzung ... -
Ein neues Verfahren zur tiefenorientierten Probenahme aus Grundwassermessstellen mit langen Filterstrecken
(2004)In vielen Messnetzen zur Grundwasserbeobachtung finden sich Messstellen mit langen Filterstrecken, bei denen die Entnahme repräsentativer tiefenorientierter Grundwasserproben problematisch ist. Hiermit wird eine neue ... -
Anmerkungen zum Einfluss von dichtebeeinflussten Grundwasserströmungen im Bereich von Altlasten
(2008)Seit Beginn der systematischen Untersuchung von Altlasten ist an vielen Standorten, insbesondere Altablagerungen, der Einfluss von dichtebeeinflussten Grundwasserströmungen für die Ausbreitung von Schadstoffen festgestellt ... -
Mythos Dispersion – wieso Modelle die Wirklichkeit nicht abbilden
(altlasten spektrum, 2017)Über das Dispersionsphänomen liegen in der Praxis vielfach falsche oder ungenaue Vorstellungen vor. Diese gehen in die Modellierung und die Interpretation von Modellergebnissen ein. Der vorliegende Beitrag soll einer Klärung ... -
Anmerkungen zur Berücksichtigung von Belastungen der Bodenluft im Baurechtsverfahren
(altlasten spektrum, 2019)Die zunehmende Bebauung mit Wohnhäusern auf ehemalig gewerblich genutzten Grundstücken sowie auf Grundstücken im Einflussbereich von Grundwasserkontaminationen macht es erforderlich, im Rahmen der behördlichen Bearbeitung ... -
Möglichkeiten und Grenzen der Vor-Ort-Analytik - Eine kritische Betrachtung an Hand von Beispielen
(altlasten spektrum, 2020)Seit Beginn der Altlastenbearbeitung sind Verfahren der Vor-Ort-Analytik für die Erkundung und Sanierungsbegleitung entwickelt und angewendet worden. Insgesamt ist diese Anwendung aber gering geblieben, insbesondere im ... -
Anmerkungen zur Schätzung von Schadstofffrachten im Grundwasser - Beobachtungen am Gartenzaun
(Altlasten Spektrum, 2020)Die Bundes-Bodenschutz- und Altlastenverordnung (BBodSchV) sieht in der Prüfung der Verhältnismäßigkeit von Maßnahmen neben Konzentrationen auch Frachten als Entscheidungskriterium vor. Die Schätzung von Frachten im ... -
Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics
; ; ; (Communications Earth & Environment, 2021-03-19)
Abstract The Black Sea experienced pronounced millennial-scale changes in temperature and rainfall during the last glacial coinciding with Dansgaard-Oeschger cycles. However, little is known regarding the amount ... -
Central Asian modulation of Northern Hemisphere moisture transfer over the Late Cenozoic
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Earth’s climatic evolution over the last 5 million years is primarily understood from the perspective of marine mechanisms, however, the role of terrestrial feedbacks remains largely unexplored. Here we reconstruct the ... -
Crustal architecture of a metallogenic belt and ophiolite belt: implications for mineral genesis and emplacement from 3-D electrical resistivity models (Bayankhongor area, Mongolia)
; ; ; (Earth, Planets and Space, 2021-04-01)
Crustal architecture strongly influences the development and emplacement of mineral zones. In this study, we image the crustal structure beneath a metallogenic belt and its surroundings in the Bayankhongor area of central ... -
GeomInt: geomechanical integrity of host and barrier rocks–experiments, models and analysis of discontinuities
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The present paper gives an overview of the GeomInt project “Geomechanical integrity of host and barrier rocks—experiment, modelling and analysis of discontinuities” which has been conducted from 2017–2020 within the framework ... -
Plane strain shear strength of unsaturated fiber-reinforced fine-grained soils
; ; (Acta Geotechnica, 2021-04-25)
Discrete randomly distributed fibers are commonly used to improve the engineering characteristics of the soil and thus soil properties such as shear strength, compressibility, density, and hydraulic conductivity. Most ... -
Empirical assessment of rockfall and debris flow risk along the Karakoram Highway, Pakistan
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The Karakoram Highway links north Pakistan with southwest China. It passes through unique geomorphological, geological and tectonic setting. This study focused 200-km-long section of the highway starting from Besham until ... -
Bayesian Quantification and Reduction of Uncertainties in 3D Geomechanical‐Numerical Models
; (Journal of Geophysical Research: Solid Earth, 2022-12-29)
The distance to failure of the upper crustal rock in the prevalent stress field is of importance to better understand fault reactivation by natural and induced processes as well as to plan and manage georeservoirs. In ... -
Pure cross-anisotropy for geotechnical elastic potentials
(Acta Geotechnica, 2021-07-28)The pure cross-anisotropy is understood as a special scaling of strain (or stress). The scaled tensor is used as an argument in the elastic stiffness (or compliance). Such anisotropy can be overlaid on the top of any elastic ... -
Early Holocene aeolian sediments in southwestern Crete−preliminary results
; ; ; ; (Mediterranean Geoscience Reviews, 2021-07-27)
The soilscapes along the southern and western coast of Crete (Greece) are dominated by coarse-grained reddish-brown slope sediments whose natural (pre-anthropogenic) configuration and properties are difficult to reconstruct ... -
Volcano‐Tectonic Evolution of the Christiana‐Santorini‐Kolumbo Rift Zone
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Located on the Hellenic Arc, the Christiana‐Santorini‐Kolumbo (CSK) rift zone represents one of the most active and hazardous volcano‐tectonic systems in the Mediterranean. Although this rift zone has been intensively ... -
Decompression and Fracturing Caused by Magmatically Induced Thermal Stresses
; ; ; (Journal of Geophysical Research: Solid Earth, 2023-03-17)
Studies of host rock deformation around magmatic intrusions usually focus on the development of stresses directly related to the intrusion process. This is done either by considering an inflating region that represents the ... -
Beyond one-way determinism: San Frediano’s miracle and climate change in Central and Northern Italy in late antiquity
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Integrating palaeoclimatological proxies and historical records, which is necessary to achieve a more complete understanding of climate impacts on past societies, is a challenging task, often leading to unsatisfactory and ... -
Quantification of Fracture Roughness by Change Probabilities and Hurst Exponents
; ; ; ; (Mathematical Geosciences, 2021-12-17)
The objective of the current study is to utilize an innovative method called “change probabilities” for describing fracture roughness. In order to detect and visualize anisotropy of rock joint surfaces, the roughness of ...
