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  • 1
    Series available for loan
    Series available for loan
    Archean geodynamics and environments (2006)
    Washington : American Geophysical Union
    Associated volumes
    Details Availability
    Call number: 5/M 07.0322
    In: Geophysical monograph
    Description / Table of Contents: Global Context. - Thermomechanical Evolution of Continents. - Subduction. - Orogenies. - Biogeochemical Environments and Life.
    Type of Medium: Series available for loan
    Pages: VIII, 320 S. , Ill., graph. Darst., Kt.
    ISBN: 0875904297
    Series Statement: Geophysical monograph 164
    Classification:
    Applied Geology
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Ground temperature changes in eastern Canada: borehole temperature evidence compared with proxy data (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Terra nova 5 (1993), S. 0 
    Details
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Borehole temperature logs have been inverted to infer ground temperature histories (GTH) in eastern and central Canada. Regional ground temperature histories were obtained by simultaneous inversion of several temperature profiles from the same areas. Simultaneous inversion of 21 temperature logs sampled across all of eastern and central Canada yielded an average solution for this region. All but three of the studied sites show signs of warming in the last 150 years. This period of warming, which started after 1800 AD, was found throughout this part of Canada. The warming followed a cooler period corresponding to the little Ice Age. The inferred ground temperature histories exhibit long-term trends similar to those obtained from treering growth indices in nearby regions and stable isotope data in the southern hemisphere. The modern warming appears correlated with the atmospheric concentration of CO2 as measured in ice cores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3121.1993.tb00222.x
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  • 3
    Electronic Resource
    Electronic Resource
    Phase change and thermal subsidence of the Williston basin (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 116 (1994), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A mechanism of subsidence for the Williston basin is proposed and tested. The mechanism combines cooling and thermal contraction of the lithosphere with a phase transformation in the lower crust. The cooling and the phase boundary movement following a sudden change in the thermal boundary condition at the base of the lithosphere are calculated; isostatic adjustments and sea-level variations are included to determine subsidence and sediment accumulation at the basin's centre, which are compared with the data. The subsidence record could not be explained by temperature boundary conditions. The calculations show that: (1) the heat-flow boundary condition explains the long duration (more than 350 Myrs) of subsidence of the Williston basin and (2) the delay of the phase-change subsidence (about 40 Myrs) explains an acceleration of subsidence in the early stages of the basin's evolution. When isostatic adjustments and the effect of sea-level variations are included, the calculated sediment accumulation history fits well the sediment record of the Williston basin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1994.tb03282.x
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  • 4
    Electronic Resource
    Electronic Resource
    Ground temperature history in central Europe from borehole temperature data (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 121 (1995), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Ground temperature histories (GTH) are inferred from temperature measurements in several boreholes of south-eastern Germany and western Bohemia (Czech Republic). The GTHs that can be extracted from these boreholes, ranging in depth between 150 and 700 m, cover the past 250 yr. Both data sets were inverted separately and yield consistent GTHs. They were also inverted jointly to yield a regional GTH of the past 250 yr for this part of Europe. The results indicate two main episodes in the mean ground temperature with (1) a cooling period from 1750–1800 to 1930–1950, followed by (2) short colder and warmer periods until now. The same trends are found in the meteorological records at four nearby weather stations (Bayreuth, Jena, München and Praha), but the meteorological record in Berlin is clearly distinct. The GTH for this part of Europe is also markedly different from one obtained in central France. These differences are consistent with the spatial variability of climatic trends.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1995.tb06440.x
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  • 5
    Electronic Resource
    Electronic Resource
    Phase changes and thermal subsidence in intracontinental sedimentary basins (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 106 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A model of tectonic subsidence is developed to explain the late acceleration of subsidence observed in some intracratonic sedimentary basins. The proposed mechanism combines the effect of thermal contraction of an initially hot lithosphere with the effect of a subcrustal phase transformation that moves under changing pressure and temperature conditions.The subsidence following a sudden change in temperature at the base of the lithosphere is calculated. The calculations show that: (1) phase changes, if present and activated, contribute substantially to the subsidence of sedimentary basins; (2) because the effect of phase change is delayed, subsidence accelerates after a time on the order of 20 Myr; and (3) the duration of the subsidence is on the order of 100 to 150 Myr. During the late stages of subsidence, the phase change is the dominating mechanism.An application to the Michigan basin is presented. The calculated sediment accumulation history fits the record well when the effect of sea-level changes is included in the model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb06337.x
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  • 6
    Electronic Resource
    Electronic Resource
    Fractal reconstruction of sea-floor topography (1989)
    Springer
    Pure and applied geophysics 131 (1989), S. 197-210 
    Details
    ISSN: 1420-9136
    Keywords: Fractal ; bathymetry ; interpolation ; fracture zone ; ridge ; tectonics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Sea-floor bathymetric profiles exhibit features at many different scales of length; this suggests that they could be described as fractals. An algorithm interpolating a fractal line between points has been used to reconstruct bathymetric profiles from a few data points. In general, this fractal line has the same Fourier amplitude spectrum as real bathymetry, and, if the parameters of the interpolation are suitably chosen, it has a very similar appearance. The success of this fractal reconstruction algorithm for the sea-floor raises the possibility that it could be used to extrapolate, from data collected at one scale, the properties of the sea-floor at finer scales, and that similar techniques could be used to interpolate a surface between bathymetric profiles. The fractal character is a sign that the processes that shape the sea-floor are scale invariant and suggests that the renormalization group technique could be used to model these processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00874487
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  • 7
    Electronic Resource
    Electronic Resource
    Strange seismic attractor? (1993)
    Springer
    Pure and applied geophysics 141 (1993), S. 71-81 
    Details
    ISSN: 1420-9136
    Keywords: Earthquakes ; deterministic chaos ; attractor ; time series ; Parkfield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Different time series were constructed from the data set containing all the seismic events recorded by the Parkfield network between 1969 and 1987. These series were analyzed to determine whether there exists an attractor in the phase space of the dynamical system characterizing seismic activity and to tentatively establish its dimension. The study has yielded ambiguous results. For all the time series analyzed, the dimension of the attractor appears higher than 12 and the correlation function of the seismic time series is undistinguishable from that of a series of random numbers of the same length. The lack of difference between the scaling parameters of two series suggests that, for all practical purposes, the seismic time series cannot be discriminated from a random series.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876235
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  • 8
    Electronic Resource
    Electronic Resource
    Evidence for recent warming from perturbed geothermal gradients: examples from eastern Canada (1992)
    Springer
    Climate dynamics 6 (1992), S. 135-143 
    Details
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Recent variations of the surface temperature of the Earth can be inferred from borehole temperature measurements. Generalized inversion is used to extract the information from the data; the potential of the method is evaluated. Tests were performed with synthetic data to demonstrate the effectiveness of the inversion to recover the gross features of the surface temperature history even when the data are affected by noise and errors. The tests show that it is possible to reconstruct the long term changes in ground temperature during the past 300 years; the resolution decreases with time, in particular if noise and errors must be filtered. Temperature logs, obtained in eastern Canada, and not suspected of being affected by non-climatic factors, have been inverted. The analysis confirms that eastern Canada has experienced warming by 1 to 2°C over the past 100–200 years. The relationship between air and ground temperatures has been examined. In eastern Canada ground temperature follows air temperature closely in summer but stays well above air temperature in winter. The number of days with snow on the ground correlates with the difference between annual mean ground and air temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193525
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  • 9
    Electronic Resource
    Electronic Resource
    Steady-State Flow Experiments to Visualise the Stress Field and Potential Crack Trajectories in 2D Elastic-Brittle Cracked Media in Uniaxial Compression (1998)
    Springer
    International journal of fracture 92 (1998), S. 349-357 
    Details
    ISSN: 1573-2673
    Keywords: Elasticity ; stress field ; crack-induced perturbations ; cracks interactions ; crack growth ; Hele Shaw cell ; steady-state flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An experimental method to visualise crack-induced perturbations of the stress field in two-dimensional elastic cracked media is presented. The method is based on the formal equivalence between the steady-state velocity field of an incompressible Newtonian fluid and the displacement field in an incompressible elastic solid in equilibrium. Two-dimensional steady-state flow experiments of an incompressible Newtonian fluid were conducted in a Hele Shaw cell. Thin rubber inclusions were inserted in the cell to model pre-existing cracks. The streamlines around the obstacles were visualised by injection of methylen blue dye into the flow. Several experiments were conducted in which different configurations of cracks were modeled: (1) one single crack inclined to the flow direction; (2) left-stepping en échelon cracks with different step-overs; and (3) randomly distributed cracks. The results compare well with the available experimental data on crack growth in elastic plates under uniaxial compression and demonstrate the ability of the method to accurately account both for cracks induced perturbations and potential crack trajectories in elastic media. Different mechanisms of crack interaction such as screening or enhancing effects are illustrated by the experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007537222483
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  • 10
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    The Formation of Continental Crust from a Physics Perspective (2018)
    Springer
    Details
    Publication Date: 2018-12-01
    Print ISSN: 0016-7029
    Electronic ISSN: 1556-1968
    Topics: Geosciences
    Published by Springer
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