Geology Reference
In-Depth Information
3
2
1
6
5
7
4
8
9
10
I
II
III
IV
V
Figure 2.9
South Caspian Depression. Map of alkaline water appearances вод in
Lower Kura Depression I. local structures:
1
. Pirsagat,
2
. Kalmas,
3
. Mishovdagh,
4
. Agzybir-Byandovan,
5
. Kyursangya,
6
. Kyurovdagh,
7
. Karabagly,
8
. Babazanan,
9
. Khilly,
10
10. Neftechala; II-III. Wells and well groups with alkaline water shows; IV. Major
faults; V. Mud volcanoes.
governed by the following formula: SO
2
−
= 1.02*10
-6
H
1.831
. It is notewor-
thy that the upper boundary of a constant sulphate presence is a rigidly
set surface (-2,300)-(-2,500) m on the western flank of the depression
and (-1,500)-(-1,700) m on the eastern flank; this surface is not associ-
ated with a particular stratigraphic interval or a particular rock lithology.
Other features of the sulphate-ion distribution are its association with the
hydrocarbonate-sodium waters (or with hard formation mixes where the
alkaline component is at least 65-70%) and increase in its content parallel
with the increase in the primary alkalinity factors (Figure 2.14).
