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Table 2 Selected in-situ and laboratory-derived key parameters for the Opalinus Clay in and around the Mont Terri rock laboratory (after Jaeggi and Bossart 2014)

From: Mont Terri rock laboratory, 20 years of research: introduction, site characteristics and overview of experiments

  1. The table is ordered into petrophysical (orange), hydraulic (blue), rock-mechanical (grey), thermal (red), and geochemical parameters (yellow, green). Parameters are provided for the ranges and best estimates for the shaly and sandy facies. The number of parameter values, if available, are indicated in parenthesis. Note that currently not all parameters are available for both facies types, e.g. molecular diffusion and thermal parameters are only available for the shaly facies.
  2. Parameters are distinguished for anisotropy by (N) samples normal to bedding, and (P) samples parallel to bedding. The petrophysical and rock-mechanical parameters originate mainly from drillcore measurements in the laboratory. Parameter values for the shaly facies are partly derived from a Bossart et al. (2008). The effective diffusion coefficients and effective porosities of the shaly facies are derived in situ and come from b Leupin et al. (2017a). The uniaxial compressive strength (UCS) values of the shaly facies normal to bedding come from c Amann et al. (2011a, b). The petrophysical and rock-mechanical parameters of the sandy facies come from d Peters et al. (2011) and e Gschwind (2013). In-situ derived hydraulic conductivities of the sandy facies come from f Lavanchy and Mettier (2012). The specific storage for the sandy facies are derived from g Yu et al. (2017). The heat capacity for the shaly facies come from h Garitte et al. (2014). Pore-water compositions with total dissolved solids originate from i Pearson et al. (2003). The total cation exchange capacity for the sandy facies has been derived by j Lerouge et al. (2011). The in-situ derived gas-entry pressure of the shaly facies originates from k Miehe et al. (2010). The seismic P-wave velocity values in this table were derived from drillcore measurements in the laboratory; in-situ derived P-wave velocities are provided by Schuster et al. (2017)