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  • GFZ German Research Centre for Geosciences  (84)
  • Basel, Beijing, Wuhan : MDPI  (64)
  • Englisch  (148)
  • 2015-2019  (148)
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  • 1
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    Manual of the Python Script HIPSTER v1.0 (2019)
    GFZ German Research Centre for Geosciences
    In:  WSM Technical Report
    Details
    Publikationsdatum: 2023-01-31
    Beschreibung: In geosciences 3D geomechanical-numerical models are used to estimate the in-situ stress state. In such a model each geological unit is populated with the rock properties Young’s module, Poisson ratio, and density. Usually, each unit is assigned a single set of homogeneous properties. However, variable rock properties are observed and expected within the same geological unit. Even in small volumes large variabilities may. The Python script HIPSTER (Homogeneous to Inhomogeneous rock Properties for Stress TEnsor Research) provides an algorithm to include inhomogeneities in geomechanical-numerical models that use the solver Abaqus®. The user specifies the mean values for the rock properties Young's module, Poisson ratio and density, and their variability for each geological unit. The variability of the material properties is individually defined for each of the three rock properties in each geological layer. For each unit HIPSTER generates a normal or uniform distribution for each rock property. From these distributions for each single element HIPSTER draws individual rock properties and writes them to a separate material file. This file defines different material properties for each element. The file is included in the geomechanical-numerical analysis solver deck and the numerical model is solved as usual. The HIPSTER script files and example files are provided for download at http://github.com/MorZieg/hipster. Table 0-1 Structure of the GitHub repository gives an overview of the repository and files including a short explanation.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
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  • 2
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    WSM quality ranking scheme, database description and analysis guidelines for stress indicator (2016)
    GFZ German Research Centre for Geosciences
    In:  WSM Technical Report
    Details
    Publikationsdatum: 2021-04-10
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
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  • 3
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    Manual of the Python Script Apple PY v1.0 (2019)
    GFZ German Research Centre for Geosciences
    In:  WSM Technical Report
    Details
    Publikationsdatum: 2021-04-10
    Beschreibung: In geosciences the discretization of complex 3D model volumes into finite elements can be a time-consuming task and often needs experience with a professional software. Es-pecially outcropping or out-pinching geological units, i.e. geological layers that are rep-resented in the model volume, pose serious challenges. Changes in the geometry of a model may occur well into a project at a point, when re-meshing is not an option any-more or would involve a significant amount of additional time to invest. In order to speed up and automate the process of discretization, Apple PY (Automatic Portioning Preventing Lengthy manual Element assignment for PYthon) separates the process of mesh-generation and unit assignment. It requires an existing uniform mesh together with separate information on the depths of the interfaces between geological units (herein called horizons). These two pieces of information are combined and used to assign the individual elements to different units. The uniform mesh is created with a standard meshing software and contains no or only very few and simple structures. The mesh has to be available as an Abaqus input file. The information on the horizons depths and lateral variations in the depths is provided in a text file. Apple PY compares the ele-ment location and depth with that of the horizons in order to assign each element to a corresponding geological unit below or above a certain horizon.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
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  • 4
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    Manual of the Matlab Script Stress2Grid v1.1 (2019)
    GFZ German Research Centre for Geosciences
    In:  WSM Technical Report
    Details
    Publikationsdatum: 2021-04-10
    Beschreibung: The distribution of data records for the maximum horizontal stress orientation SHmax in the Earth’s crust is sparse and very unequally. To analyse the stress pattern and its wavelength and to predict the mean SHmax orientation on regular grids, statistical interpolation as conducted e.g. by Coblentz and Richardson (1995), Müller et al. (2003), Heidbach and Höhne (2008), Heidbach et al. (2010) or Reiter et al. (2014) is necessary. Based on their work we wrote the Matlab® script Stress2Grid that provides several features to analyse the mean SHmax pattern. The script facilitates and speeds up this analysis and extends the functionality compared to the publications mentioned before. This script is the update of Stress2Grid v1.0 (Ziegler and Heidbach, 2017). It provides two different concepts to calculate the mean SHmax orientation on regular grids. The first is using a fixed search radius around the grid points and computes the mean SHmax orientation if sufficient data records are within the search radius. The larger the search radius the larger is the filtered wavelength of the stress pattern. The second approach is using variable search radii and determines the search radius for which the standard deviation of the mean SHmax orientation is below a given threshold. This approach delivers mean SHmax orientations with a user-defined degree of reliability. It resolves local stress perturbations and is not available in areas with conflicting information that result in a large standard deviation. Furthermore, the script can also estimate the deviation between plate motion direction and the mean SHmax orientation.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
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  • 5
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    Manual of the Matlab Script Stress2Grid (2017)
    GFZ German Research Centre for Geosciences
    In:  WSM Technical Report
    Details
    Publikationsdatum: 2021-04-10
    Beschreibung: Hyperspectral airborne campaigns have been carried out in the frame of the data exploitation and application development program of the German Environmental Mapping and Analysis Program (EnMAP) to support method and application development in the prelaunch phase of the EnMAP satellite mission. A metadata portal (EnMAP Campaign Portal) has been set up providing general information about the campaigns, recorded airborne hyperspectral data sets, other data associated to the respective campaigns like field and laboratory measurements and a number of field guides for in-situ data acquisition. Furthermore, it informs about the availability of simulated EnMAP and Sentinel-2 data for the respective campaign region. The data listed in the EnMAP Campaign Portal is freely available under a Creative Commons License as DOI-referenced data publications.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
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  • 6
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    MT Repository : user manual (2019)
    GFZ German Research Centre for Geosciences
    In:  Scientific Technical Report STR
    Details
    Publikationsdatum: 2021-03-28
    Beschreibung: The MT repository contains geophysical data sets collected in field experiments from all over the world. The acronym MT stands for magnetotelluric, a geophysical method used to probe the Earth's deep interior for its electrical conductivity distribution through electromagnetic (EM) induction. MT is based on EM fields generated by natural processes in the Earth's atmosphere and magnetosphere. But the repository also contains data from Controlled Source Electromagnetic (CSEM) projects, for which man-made EM sources are used. The principle form of data in the repository are time-series of EM field components acquired with heterogeneous sets of sensors, recording instruments, and sampling rates. It is the main purpose of this archive or repository to provide the links between the data and their physical meaning by means of metadata. To achieve this, the repository is organized as a combination of data files and associated meta-data in a well defined folder (directory) structure, with the data files being sorted into subfolders. Meta-data are provided as XML (Extensible Markup Language) formatted file.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
    Format: application/pdf
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  • 7
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    Manual of the Matlab Script FAST Calibration v1.0 (2018)
    GFZ German Research Centre for Geosciences
    In:  WSM Technical Report
    Details
    Publikationsdatum: 2021-03-15
    Beschreibung: The 3D geomechanical-numerical modelling of the in-situ stress state requires observed stress information at reference locations within the model area to be compared to the modelled stress state. This comparison of stress states and the ensuing adaptation of the displacement boundary conditions provide a best fit stress state in the entire model region that is based on the available stress information. This process is also referred to as calibration. Depending on the amount of available information and the complexity of the model the calibration is a lengthy process of trial-and-error modelling and analysis. The Fast Automatic Stress Tensor Calibration (FAST Calibration) is a method and a Matlab script that facilitates and speeds up the calibration process. The method requires only three model scenarios with different boundary conditions. The modelled stress states at the locations of the observed stress state are extracted. Then they are used to compute the displacement boundary conditions that are required in order to achieve the best fit of the modelled to the observed stress state. Furthermore, the influence of the individual observed stress information on the resulting stress state can be weighted.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
    Format: application/pdf
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  • 8
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    Dead Sea Seismic Array, Jordan for DESERVE Project (Feb. 2014 - Feb. 2015) - Report (2016)
    GFZ German Research Centre for Geosciences
    In:  Scientific Technical Report STR - Data | GIPP Experiment and Data Archive
    Details
    Publikationsdatum: 2021-02-13
    Beschreibung: A temporary seismic array was installed in combination with a meteorological station in the Dead Sea valley, Jordan. Within the scope of the HGF virtual institute DESERVE we operated 15 temporary seismic stations between February 2014 and February 2015 together with a nearby meteorological station close to the east coast of the Dead Sea. The main aim was to acquire data to study the influence of wind on seismic records and retrieve related meteorological parameters. The study area is scarcely populated and has ideal meteorological conditions to study periodically occurring winds.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
    Format: application/pdf
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  • 9
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    Python Script HIPSTER (2019)
    GFZ German Research Centre for Geosciences
    Details
    Publikationsdatum: 2020-12-17
    Beschreibung: In geosciences 3D geomechanical-numerical models are used to estimate the in-situ stress state. In such a model each geological unit is populated with the rock properties Young’s module, Poisson ratio, and density. Usually, each unit is assigned a single set of homogeneous properties. However, variable rock properties are observed and expected within the same geological unit. Even in small volumes large variabilities may. The Python script HIPSTER (Homogeneous to Inhomogeneous rock Properties for Stress TEnsor Research) provides an algorithm to include inhomogeneities in geomechanical-numerical models that use the solver Abaqus®. The user specifies the mean values for the rock properties Young's module, Poisson ratio and density, and their variability for each geological unit. The variability of the material properties is individually defined for each of the three rock properties in each geological layer. For each unit HIPSTER generates a normal or uniform distribution for each rock property. From these distri-butions for each single element HIPSTER draws individual rock properties and writes them to a separate material file. This file defines different material properties for each element. The file is included in the geomechanical-numerical analysis solver deck and the numerical model is solved as usual.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/other
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  • 10
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    Manual of the Tecplot 360 Add-on GeoStress (2017)
    GFZ German Research Centre for Geosciences
    In:  WSM Technical Report
    Details
    Publikationsdatum: 2020-12-04
    Beschreibung: Hyperspectral airborne campaigns have been carried out in the frame of the data exploitation and application development program of the German Environmental Mapping and Analysis Program (EnMAP) to support method and application development in the prelaunch phase of the EnMAP satellite mission. A metadata portal (EnMAP Campaign Portal) has been set up providing general information about the campaigns, recorded airborne hyperspectral data sets, other data associated to the respective campaigns like field and laboratory measurements and a number of field guides for in-situ data acquisition. Furthermore, it informs about the availability of simulated EnMAP and Sentinel-2 data for the respective campaign region. The data listed in the EnMAP Campaign Portal is freely available under a Creative Commons License as DOI-referenced data publications.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/report
    Format: application/pdf
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