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Table 1 Mineral composition and flow velocity in the natural waters

From: How long do natural waters “remember” release incidents of Marcellus Shale waters: a first order approximation using reactive transport modeling

Mineral Mineral formula Volume fraction
S aquifer [28, 29, 33,34,35] SG aquifers [29, 30, 36,37,38,39] River [32, 40,41,42]
Primary mineralsa
 Quartz SiO2 4.13 × 10−1 5.80 × 10−1 6.74 × 10−3
 K-Feldspar KAlSi3O8 3.50 × 10−1 1.80 × 10−1 7.40 × 10−4
 Muscovite KAl2(Si3Al)O10(OH)2 1.05 × 10−1 0.00 0.00
 Sericite KAl2(Si3Al)O10(OH)2 4.20 × 10−2 0.00 0.00
 Clinochlore-14A Mg5Al2(Si3O10)(OH)8 2.80 × 10−2 0.00 0.00
 Daphnite-14A Fe5Al2(Si3O10)(OH)8 2.80 × 10−2 0.00 0.00
 Kaolinite Al2Si2O5(OH)4 1.40 × 10−2 9.00 × 10−4 0.00
 Illite K0.6Mg0.25Al1.8(Al0.5Si3.5O10)(OH)2 0.00 0.00 1.08 × 10−2
 Calcite CaCO3 3.50 × 10−2 6.00 × 10−4 1.50 × 10−3
 Dolomite CaMg(CO3)2 0.00 9.60 × 10−3 2.60 × 10−4
 Suspended sediments 2.0 × 10−2
Porosity   3.00 × 10−1 3.90 × 10−1 9.80 × 10−1
Total 1.00 1.00 1.00
Flow velocity (m/day) 2.00 × 10−1 b 4.00 × 10−1 c 2.76 × 104 [40,41,42]
Permeability (m2) 5.00 × 10−13 b 5.00 × 10−12 c
  1. aFour secondary minerals, including gypsum, celestite, barite, and gibbsite, are initially assigned with a volume fraction of 10−10 for precipitation in simulated natural water domain [29, 33]
  2. bPorosity and flow velocity are within the typical range for S aquifers in this area [34, 35]
  3. cPorosity and flow velocity are within the typical range for SG aquifers [36, 37]