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Table 2 Overview of general hydraulic conditions and secondary fracture fillings in selected URLs in the crystalline basement worldwide (e.g. Himmelsbach et al. 2003; Stanfors et al. 1999; Himmelsbach et al. 1998; Komulainen et al. 2014; Davison 1984; Kumazaki et al. 2003)

From: Criteria and geological setting for the generic geothermal underground research laboratory, GEOLAB

Name Hydraulic properties Secondary minerals in fractures
Grimsel Test Site, Switzerland MHC: 10−12–10−11 m s−1 Albite, epidote, muscovite, mica, chlorite, calcite
FT: up to 10−10–10−5 m2 s−1 CM: <10 % mainly illite
Äspö Hard Rock Laboratory, Sweden MHC: >10−12 m s−1 Chlorite, epidote, zoisite, albite, calcite, fluorite, sericite, and zeolites, hematite
FT: up to >10−4 m2 s−1 CM: illite, mixed-layer clay
Overall pumping rate: about 20 L s−1  
Onkalo, Finland FT (depth <85 m): up to >10−6 m2 s−1 Fe-sulphides, pyrrhotite, pyrite, and calcite
FT (depth >85 m): up to >10−7 m2 s−1 CM: illite, smectite-group, kaolinite
AECL URL, Lac du Bonnet, Canada MHC: <10−11 m s−1 Chlorite, iron oxides, carbonates, epidote
FT: up to >10−3 m2 s−1 CM: present (type N/A)
Mizunami URL, Japan HC (fresh Toki granite): >10−7 m s−1 Quartz, plagioclase, K-feldspar and biotite, iron oxides, chlorite, calcite
HC (altered Toki granite): >10−8 m s−1 CM: kaolinite, montmorillomite
Josef URL, Czech Republic HC (overall): 2–5·10−9 m s−1 Ore (gold,…), quartz, calcite, barite
CM: n/a
Mine Reiche Zeche, Freiberg, Germany MHC: <10−12 m s−1 Ore: sulphides, quartz, fluorite, sulphates, barite, feldspars, pyrite CM: n/a
FT: up to 10−8–10−4 m2 s−1
Lindau test site, Black Forest, Germany HC (fractured ore dike): 5·10−6–10−4 m s−1 Quartz, fluorite, barite, ore
HC (fractured granite): 5·10−10–10−8 m s−1 CM: kaolinite
FT: up to >10−6–5·10−4 m2 s−1  
  1. HC hydraulic conductivity, MHC matrix HC, FT fracture transmissivity, CM clay minerals