Active Microbial Communities Inhabit Sulphate-Methane Interphase in Deep Bedrock Fracture Fluids in Olkiluoto, Finland
Table 1
The geochemical and biological measurements from the samples collected from fracture fluids from seven different boreholes in Olkiluoto, Finland. The different boreholes are presented as sampling depths.
296 m
328 m
347 m
415 m
559 m
572 m
798 m
Borehole
OL-KR13
OL-KR6
OL-KR23
OL-KR49
OL-KR2
OL-KR1
OL-KR29
Depth below ground surface (m)
−296.11
−328.37
−346.52
−415.45
−559.15
−572.24
−797.81
Water type
Brackish SO4
Brackish SO4
Saline
Saline
Saline
Saline
Saline
Transmissivity (m2 s−1)
5.86 × 10−8
1.31 × 10−7
6.48 × 10−7
4.37 × 10−7
4.33 × 10−7
5.50 × 10−7
(<10−9)
Hydrogeological zone
HZ001
HZ20A
HZ21
HZ21
Pump rate (mL min−1)
22
104
20
172
23.9
62.1
6.1
Cumulative volume fracture fluid removed (L)
1129
5486
971
7509
1251
4492
496
Sampling date Microbiology
9.3.2010
18.5.2010
15.12.2009
14.12.2010
27.1.2010
26.1.2010
18.5.2010
Sampling date Chemistry
1.3.2010
10.5.2010
7.12.2009
1.12.2009
18.1.2010
18.1.2010
3.5.2010
Sampling date CH4
6.3.2006
3.8.2005
18.3.2003
13.5.2003
4.4.2005
Temperature (°C)
19.6
11.6
17.6
11
14.8
12
17.7
pH
7.9
7.9
7.5
8.1
8.6
7.8
7.3
Ec (mS m−1)
897
1832
2190
2670
4110
3770
7820
DIC (mgC L−1)
27
4.1
3.9
<3
<3.75
<3.75
<21
NPOC (mgC L−1)
10
<2.4
5.1
<3
11
5
<12
TDS (mg L−1)
4994
10655
12733
15899
25459
23261
53205
Alk (m) meq L−1
2.19
0.37
0.28
0.16
0.29
0.23
0.13
(mg L−1)
79.5
379
2.9
1.4
0.5
0.5
<2
S2− (mg L−1)
5.10
NA
0.62
0.02
<0.02
0.13
<0.02
NO3 (mg L−1)
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
NH4 (mg L−1)
0.07
0.03
<0.02
<0.02
<0.02
0.04
0.08
Fe2+ (mg L−1)
<0.02
NA
0.08
0.53
<0.02
0.40
0.46
Na2+ (mg L−1)
1320
2800
2530
3110
4980
4720
9150
K+ (mg L−1)
8.2
9.3
8.3
9.6
19
20
27
Ca2+ (mg L−1)
460
1100
2100
2700
4600
3700
10000
Mg2+ (mg L−1)
35
77
55
19
18
52
136
Cl− (mg L−1)
2920
6230
7930
9940
15700
14600
33500
CH4 (mL L−1)
22
22
NA
NA
386
272
920
TNC (mL−1)
4.2 × 105
1.0 × 105
2.5 × 105
1.5 × 104
5.9 × 104
8.7 × 104
2.3 × 104
dsrB gene copies
3.1 × 104 (8.6 × 103)
5.4 × 103 (2.2 × 103)
1.4 × 104 (6.8 × 103)
1.6 × 104 (9.9 × 103)
6.5 × 101 (2.0 × 101)
2.2 × 103 (2.9 × 102)
0
dsrB transcripts
1.4 × 102 (1.5 × 102)
1.2 × 102 (7.0 × 101)
2.9 × 102 (1.8 × 102)
3.7 × 100 (1.6 × 100)
0
2.0 × 101 (9.0 × 100)
0
mcrA copies
7.5 × 100 (2.5 × 100)
0
5.4 × 101 (2.7 × 101)
0
4.6 × 102 (5.2 × 100)
2.5 × 101 (4.8 × 100)
0
mcrA transcripts
0
0
0
0
0
0
0
NA: data not available. *Figure in brackets shows standard error of mean (SEM).
