Surgil ESIA Report - Volume III - EKN

“O’ZLITINEFTGAZ” PC
PFS “Surgil field complex costruction with valuable
components retrieval”
Layer upper boundary is bedded on 0.0m depth from ground surface.
Grounds (according to archive data) heavily aggressive in relation to concrete on
Portland cement, slag-Portland cement and sulfate-resistant cement. Underground waters
are deeply bedded - tens meters and will not be effect on the foundations of design
construction.
Proceeding from the analysis of the soil cover condition in the object zone, it is
possible to draw a conclusion:
- Object construction is carried out on the grounds not suitable for agriculture
because of low fertility and heavy soils salinization;
- Soils of investigated area basically have already broken structure, therefore
they will not bring additional physical influence of considerable changes;
- Chemical pollution collects, basically, in the top soils because of high
capacitance properties of composed rocks.
The radioactivity of soils types fluctuates within 18-20mcr/h. According to sanitary
norms of radiation safety of the Republic of Uzbekistan the exposure rate for the territories
with constant presence of people should not exceed 30mcr/h. Thus, the natural radioactivity
of soils does not exceed MPC.
1.3.4 GEOLOGICAL STRUCTURE
Rocks from upper Paleozoic up to anthropogene take part in a structure of a
sedimentary cover and an intermediate structural storey.
Paleozoic group - Рz
Devonian system - D
There are heavy opened fissured, fine-grained sandstones and siltstones of quartzfeldspar
composition with debrises of dacite-andesite effusive and petrosilexes. The fissures
are executed by calcite and residual highly metamorphizated organic substance.
Carboniferous system - C
Rocks of carboniferous complex with cross and stratigraphic bedding overlie deposits
of lower phamen layer of upper Devonian. The complex is composed by calcareous
formation of upper Devonian (upper phamen) – lower carbon and magmatogenesedimentary
formation of upper carbon – lower Permian.
Middle carboniferous deposits - (С 2 ) are presented by alternation of siltstones,
mudstones and biogenic-fragmental limestone.
Upper carboniferous – lower Permian deposits (С 3 -Р 1 ) are composed by a wide
spectrum of formations - from magmatic to sedimentary. They are presented mainly by
black, calcinated, horizontally layered mudstones, with sulfide mineralization, with spicules
of sponges and radiolarians, quite often passing into tuffs.
Volume 2. Part 1. EIS Project for Surgil field construction
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