Auflistung Geologie nach Titel
Anzeige der Dokumente 841-860 von 931
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The Langeland Fault System unravelled: Quaternary fault reactivation along an elevated basement block between the North German and Norwegian–Danish basins
; ; ; ; ; (Boreas, 2023-02-08)
The reactivation of faults and possible impact on barrier integrity marks a critical aspect for investigations on subsurface usage capabilities. Glacial ...
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The Late Carboniferous deeply eroded Tharandt Forest caldera–Niederbobritzsch granite complex: a post-Variscan long-lived magmatic system in central Europe
; ; ; ; ; (International Journal of Earth Sciences, 2021-04-08)
Samples and documentation of outcrops and drillings, facies analysis, whole rock geochemistry and radiometric ages have been employed to re-evaluate the Late Carboniferous Tharandt Forest caldera (TFC) and the co-genetic ... -
The Late Mesozoic-Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling
(Paleoceanography and Paleoclimatology, 2019)
Over the past 3–4 decades, coincident with global warming and atmospheric CO2 increase, Arctic sea ice has significantly decreased in its extent as well as in thickness. When extrapolating this alarming trend, the central ... -
The late Quaternary environmental and climatic history of North-East Greenland, inferred from coastal lakes
(Univ. Köln, 2009)Eleven lakes and ponds and three lacustrine sediment sequences from coastal East and North-East Greenland were studied for recent hydrological and phytoplankton characteristics and for palaeolimnology, respectively. The ... -
The Malolotsha Klippe: Large‐Scale Subhorizontal Tectonics Along the Southern Margin of the Archean Barberton Greenstone Belt, Eswatini
; ; ; ; (Tectonics, 2023-01-03)
Whether Archean tectonics were horizontally or vertically dominated is controversially discussed because arguments bear on the kinematics and thermal state of the Archean mantle and constrain the mode of formation of the ... -
The marble sculptures of General Bülow and Scharnhorst in Berlin: comparative, non-destructive analysis of the weathering state after 12 years of exposure
; ; ; (Environmental Earth Sciences, 2020-05-20)
After almost 200 years of exposure, the monuments of General Scharnhorst and Bülow have been analysed by means of ultrasound. Both sculptures are made of Carrara marble, both sculptures have been exposed to the same ... -
The metallogenesis of the Skorpion non-sulphide zinc deposit, Namibia
(Univ. Halle, 2006)Zsfassung in dt. Sprache -
The Neoproterozoic-early Paleozoic metamorphic and magmatic evolution of the Eastern Sierras Pampeanas: an overview
Steenken, André; López de Luchi, Mónica; Martínez Dopico, Carmen; Drobe, Malte;; Siegesmund, Siegfried (International Journal of Earth Sciences, 2010)
The Eastern Sierras Pampeanas were structured by three main events: the Ediacaran to early Cambrian (580–510 Ma) Pampean, the late Cambrian–Ordovician (500–440 Ma) Famatinian and the Devonian-Carboniferous (400–350 Ma) ... -
The optical properties and quantum chemical calculations of thienyl and furyl derivatives of pyrene.
(Physical chemistry chemical physics : PCCP, 2015-09-21)A detailed electrochemical, photophysical and theoretical study is presented for various new thienyl and furyl derivatives of pyrene. Their optical properties are described based on UV-VIS absorption and both steady-state ... -
The Pacific challenge ; development trends in the 21st century.
; Kreisel, Werner (Hrsg.) (Universitätsverlag Göttingen, 2005)
The enormous leaps of growth and development experienced by Eastern and Southeast Asian states since the 1960s on account of their astonishing industrial development have led to concerns that a resulting global economic ... -
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions
; ; ; ; (Journal of Quaternary Science, 2023-01-15)
ABSTRACT Reconstruction of mass accumulation rates (MARs) in loess deposits are widely used for ...
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The Permeability of Columnar Jointed Lava
; (Journal of Geophysical Research: Solid Earth, 2019)
Columnar jointed lava is an important facies in many geothermal reservoir systems. The permeability of jointed lavas is dominated by the contribution from fracture networks. We use a scaling for the permeability of a set ... -
The Phanerozoic thermo-tectonic evolution of northern Mozambique constrained by 40Ar/39Ar, fission track and (U-Th)/He analyses
(Univ. Bremen, 2007)Thermochronology, Fission track, (U-Th)/He, 40Ar/39Ar,Mozambique, Gondwana, supercontinent dispersal. - Results of thermochronometric investigations comprising 40Ar/39Ar hornblende and biotite, titanite and apatite fission ... -
The replacement of plagioclase feldspars by albite: observations from hydrothermal experiments
(Contributions to Mineralogy and Petrology, 2009)Oligoclase and labradorite crystals have been experimentally replaced by albite in an aqueous sodium silicate solution at 600°C and 2 kbars. The replacement is pseudomorphic and is characterised by a sharp chemical interface ... -
The Ries impact and its distal effects in sediments of Central Europe—A review
; (Meteoritics & Planetary Science, 2023-03-23)
The Ries impact is the most important cosmic event in the younger geological history of Europe. Its effects reach far beyond the area considered so far and are documented in manifold evidence. In this paper, the widely ... -
The Río de la Plata Craton: a review of units, boundaries, ages and isotopic signature
Oyhantçabal, Pedro; Siegesmund, Siegfried; (International Journal of Earth Sciences, 2010)
A review of the lithostratigraphic units in the Río de la Plata Craton and of new and previously published geochronological, isotopic and geophysical data is presented. Sm–Nd TDM model ages between 2.6 and 2.2 Ga characterize ... -
The Role of Fluid Seepage in the Erosion of Mesozoic Carbonate Escarpments
; ; ; (Journal of Geophysical Research: Earth Surface, 2021-11-12)
Mesozoic submarine carbonate escarpments are erosional features that host box canyons, the formation of which had been attributed to seepage erosion in view of their similarity to subaerial box canyons. The latter had been ... -
The Role of Rock Matrix Permeability in Controlling Hydraulic Fracturing in Sandstones
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A concomitant effect of a hydraulic fracturing experimenting is frequently fluid permeation into the rock matrix, with the injected fluid permeating through the porous rock matrix (leak-off) rather than contributing to the ... -
The sediment record of Lake Ohrid (Albania/Macedonia) - new methodological approaches, tephrostratigraphy, chronology, and inferences of past climatic and environmental changes
(Univ. Köln, 2009)This thesis had two primary objectives: One objective was to explore and develop applications of Fourier transform infrared spectroscopy (FTIRS) for the quantification of biogeochemical properties in lake sediment; the ... -
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 ...
