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Stoepke, Fiene; Ikari, Matt J; Cassidy, Mike; Urlaub, Morelia: Direct shear experiments on powdered gouge of ash and scoria samples from Anak Krakatau, Sunda Strait, Indonesia [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.973234 (dataset in review)

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Abstract:
We performed laboratory friction experiments on simulated fault gouges of ash and scoria samples from Anak Krakatau (Sunda Strait, Indonesia), representing the two main lithologies that can be found at Anak Krakatau and measured the velocity-dependence of friction in velocity-step tests. Moreover, we have directly measured cohesion on the samples of powdered gouge of ash and scoria. The experiments were carried out using a single-direct shear device at room temperature. For the shearing tests, all samples were crushed and sieved to a grain size < 125 µm. The ash sample was tested under fluid-saturated conditions (3.5 % NaCl brine) and the scoria sample was tested under fluid-saturated (3.5 % NaCl brine) and room dry conditions. The experiments were carried out at two different effective normal loads, 2.5 and 8 MPa, to simulate different depths of a proto shear plane within the volcanic edifice.
Keyword(s):
Anak Krakatau; Direct Shear; Laboratory experiment; rate-and-state friction; weakening
Funding:
European Research Council (ERC), grant/award no. 948797: Slow sliding of volcanic flanks as PREcursor to catastrophic COLLAPSE
Coverage:
Latitude: -6.101944 * Longitude: 105.423056
Date/Time Start: 2017-09-01T00:00:00 * Date/Time End: 2017-09-01T00:00:00
Event(s):
Anak_Krakatau * Latitude: -6.101944 * Longitude: 105.423056 * Date/Time: 2017-09-01T00:00:00 * Elevation: 0.0 m * Method/Device: Field sampling, rock hammer
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
6 datasets

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Datasets listed in this bundled publication

  1. Stoepke, F; Ikari, MJ; Cassidy, M et al. (in review): Details of direct shear experiments on powdered gouge of ash and scoria samples from Anak Krakatau, Sunda Strait, Indonesia (Table 1). https://doi.pangaea.de/10.1594/PANGAEA.973217
  2. Stoepke, F; Ikari, MJ; Cassidy, M et al. (in review): Coefficient of friction measurements on powdered gouge of ash and scoria samples from Anak Krakatau, Sunda Strait, Indonesia (Table 2). https://doi.pangaea.de/10.1594/PANGAEA.973176
  3. Stoepke, F; Ikari, MJ; Cassidy, M et al. (in review): Velocity-dependent friction measurements, input parameters for forward modeling on powdered gouge of ash and scoria samples from Anak Krakatau, Sunda Strait, Indonesia (Table 3). https://doi.pangaea.de/10.1594/PANGAEA.973213
  4. Stoepke, F; Ikari, MJ; Cassidy, M et al. (in review): Velocity-dependent friction measurements, inverse modeling results (aging law) on powdered gouge of ash and scoria samples from Anak Krakatau, Sunda Strait, Indonesia (Table 4). https://doi.pangaea.de/10.1594/PANGAEA.973214
  5. Stoepke, F; Ikari, MJ; Cassidy, M et al. (in review): Velocity-dependent friction measurements, inverse modeling results (slip law) on powdered gouge of ash and scoria samples from Anak Krakatau, Sunda Strait, Indonesia (Table 5). https://doi.pangaea.de/10.1594/PANGAEA.973215
  6. Stoepke, F; Ikari, MJ; Cassidy, M et al. (in review): Cohesion measurements on powdered gouge of ash and scoria samples from Anak Krakatau, Sunda Strait, Indonesia (Table 6). https://doi.pangaea.de/10.1594/PANGAEA.973216