192
Table 2 The quartz OSL age, equivalent dose (De) and annual dose rate for samples from the Yamuna Valley alluvial deposit
Sr.
no
Sample. No
Depth
(m)
Discs
a
U (ppm) Th (ppm) K %
Average equivalent
dose (De) in gray
Dose rate
(gray/ka)
Age in ka
Nature of quartz/remarks
1
BAR-1
5
26 (57)
5.41
34.15
1.99
114 ± 4
4.8 ± 0.2
24 ± 1
2
BAR-2
8
19 (45)
6.08
37.42
1.69
117 ± 0.5
4.6 ± 0.5
25 ± 3
3
BAR-4
3
31 (65)
4.91
30.17
1.41
132 ± 5
3.9 ± 0.4
34 ± 3.7
4
BAR-5
60
51(84)
6.75
53.19
1.26
144 ± 4
5.5 ± 0.3
28 ± 2
5
LM-1
11.8
67 (90)
2.40
15.16
1.91
71.9 ± 1.9
3 ± 0.2
23 ± 1
6
LM-2
58
46 (72)
1.95
12.18
1.95
114 ± 4
2.8 ± 0.2
41 ± 3
Over dispersion in De
value 21%
7
OSL-PC-1
10
92(117)
3.44
17.38
1.95
132 ± 3
3.5 ± 0.2
38 ± 2
8
OSL-PC-2
50
82(123)
5.63
27.96
2.10
187 ± 4
4.6 ± 0.3
40 ± 2
9
OSL-Y-1
5
65(111)
4.31
17.50
2.15
181 ± 5
3.9 ± 0.2
47 ± 3
10
OSL-Y-2
20
57(122)
2.98
13.56
2.20
125 ± 4
3.3 ± 0.2
37 ± 2
11
OSL-B-1
4
57(108)
11.83
79.79
1.58
166 ± 5
8.7 ± 0.5
19 ± 1
12
BARKOT-1
10
69 (105)
5.14
27.57
1.9
220 ± 5
4.4 ± 0.3
50 ± 3
13
OSL- OJRI- 1
4
98(117)
6.95
25.90
1.95
395 ± 8
4.8 ± 0.3
83 ± 5
14
OSLPHTP- 1
120
66(128)
3.13
16.02
1.65
106 ± 3
3 ± 0.2
35 ± 2
Over dispersion in De
value 21%
15
OSL- BAR- 2New
6
68(114)
2.33
13.81
1.95
133 ± 3
3 ± 0.2
43 ± 3
16
LKT-1
8
81(98)
3.01
27.14
1.8
358 ± 3
4.1 + 0.02
87.4 + 4
17
LKT-2
7
51(80)
3.3
2.6
1.25
399 ± 1
3.8 ± 0.2
105 + 9
a
Selected (measured)
The concentrations of uranium, thorium, potassium and the present water content used for the annual dose rate calculation
S. Dutta et al.
Table 2 The quartz OSL age, equivalent dose (De) and annual dose rate for samples from the Yamuna Valley alluvial deposit
Sr.
no
Sample. No
Depth
(m)
Discs
a
U (ppm) Th (ppm) K %
Average equivalent
dose (De) in gray
Dose rate
(gray/ka)
Age in ka
Nature of quartz/remarks
1
BAR-1
5
26 (57)
5.41
34.15
1.99
114 ± 4
4.8 ± 0.2
24 ± 1
2
BAR-2
8
19 (45)
6.08
37.42
1.69
117 ± 0.5
4.6 ± 0.5
25 ± 3
3
BAR-4
3
31 (65)
4.91
30.17
1.41
132 ± 5
3.9 ± 0.4
34 ± 3.7
4
BAR-5
60
51(84)
6.75
53.19
1.26
144 ± 4
5.5 ± 0.3
28 ± 2
5
LM-1
11.8
67 (90)
2.40
15.16
1.91
71.9 ± 1.9
3 ± 0.2
23 ± 1
6
LM-2
58
46 (72)
1.95
12.18
1.95
114 ± 4
2.8 ± 0.2
41 ± 3
Over dispersion in De
value 21%
7
OSL-PC-1
10
92(117)
3.44
17.38
1.95
132 ± 3
3.5 ± 0.2
38 ± 2
8
OSL-PC-2
50
82(123)
5.63
27.96
2.10
187 ± 4
4.6 ± 0.3
40 ± 2
9
OSL-Y-1
5
65(111)
4.31
17.50
2.15
181 ± 5
3.9 ± 0.2
47 ± 3
10
OSL-Y-2
20
57(122)
2.98
13.56
2.20
125 ± 4
3.3 ± 0.2
37 ± 2
11
OSL-B-1
4
57(108)
11.83
79.79
1.58
166 ± 5
8.7 ± 0.5
19 ± 1
12
BARKOT-1
10
69 (105)
5.14
27.57
1.9
220 ± 5
4.4 ± 0.3
50 ± 3
13
OSL- OJRI- 1
4
98(117)
6.95
25.90
1.95
395 ± 8
4.8 ± 0.3
83 ± 5
14
OSLPHTP- 1
120
66(128)
3.13
16.02
1.65
106 ± 3
3 ± 0.2
35 ± 2
Over dispersion in De
value 21%
15
OSL- BAR- 2New
6
68(114)
2.33
13.81
1.95
133 ± 3
3 ± 0.2
43 ± 3
16
LKT-1
8
81(98)
3.01
27.14
1.8
358 ± 3
4.1 + 0.02
87.4 + 4
17
LKT-2
7
51(80)
3.3
2.6
1.25
399 ± 1
3.8 ± 0.2
105 + 9
a
Selected (measured)
The concentrations of uranium, thorium, potassium and the present water content used for the annual dose rate calculation
S. Dutta et al.