Krasnodar GRES Project Volume I11 Environmental Assessment

section. The section center is noted for a marking stratum about 200 m thick. The
total thickness of the Paleocene section is 650-700 m.
Neogene sediments, consisting of a clay layer with interlayers of aleurolites and
less frequently marls about 350 m thick, occur on vast areas of the East-Kuban
trough. In the region of the Krasnodar GRES site, under the quaternary formations
there are the lowest horizons (lower + middle Miocene) of Neogene, represented
primarily by clays. The total thickness is 350 m.
The quaternary deposits in the region are composed of deluvial loams of marginal
thickness (1-3 m) as well as alluvial pebble, sand, sandy loam and clay, with a
total thickness of 30 to 60 m.
The total thickness of the sedimentary cover in the region of the Krasnodar GRES
site is 5250-5300 m.
According to drilling data (reference materials of Ukrgidroproekt), the section of
quaternary deposits within the construction site is as follows:
From deep to shallow: low-middle quaternary:
Layer 1 - pebble and gravel with inclusions of boulders, water saturated,
with thickness of 4-10 m.
Layer 2 - pebble and gravel with inclusions of boulders, dry, with thickness
0-4m.
Recent deposits:
Layer 3 - hard and semihard clays with limy concretions, dry, with
thickness 0-1 2m.
4.3.1.2 Seismology
The Krasnodar GRES site is located in the western part of the North-Caucasian
seismic region and pertains to the 8 point zone according to the map of seismic
regionalization of the Russian Federation.
Analysis of earthquake catalogs, obtained from the Bank of Geophysical Data on
prediction of Earthquakes, and I.V. Ananin's macroseismic findings show that data
on seismic phenomena in the North Caucasus began only at the end of the XVlll
to the beginning of the XIX centuries. Instrumental data on the earthquake
epicenters are available from 191 2.
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