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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]
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Geochemical Transactions

ISSN: 1467-4866

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