Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor
Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor
Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor
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GEOLOGICAL CHARACTERISTICS<<strong>br</strong> />
OF THE CLAY DEPOSIT<<strong>br</strong> />
DUŠANOVAC<<strong>br</strong> />
The geological structure of deposit<<strong>br</strong> />
[3,5] consists of sand, clay and pontian<<strong>br</strong> />
sandstone (Pl1) and significantly less frequent<<strong>br</strong> />
proluvium Holocene (prQ2) made<<strong>br</strong> />
of: gravel, sand and loam.<<strong>br</strong> />
The oldest Quaternary sediments [5] are<<strong>br</strong> />
presented by river-lake gravels, sands and<<strong>br</strong> />
loams. According to their characteristics,<<strong>br</strong> />
they correspond to alluvial gravels and<<strong>br</strong> />
sands. Gravels are medium to coarsegrained,<<strong>br</strong> />
the heterogeneous composition of<<strong>br</strong> />
different curvature and weak sortness, and<<strong>br</strong> />
most often occur in the form of lenses embedded<<strong>br</strong> />
in the sand. The composition of<<strong>br</strong> />
gravel consists of sandstone, limestone, micro<<strong>br</strong> />
conglomerates, quartz, cherts, gneiss-<<strong>br</strong> />
granite and others. Yellow sands, sand<<strong>br</strong> />
loams and loams of loess habiti lie over<<strong>br</strong> />
gravels. The horizontal bedding is observed<<strong>br</strong> />
in them as well as the traces of marsh vegetation<<strong>br</strong> />
growns, so it is logical that these are<<strong>br</strong> />
the product of aquatic environment<<strong>br</strong> />
Lower Pliocene sediments [5]<<strong>br</strong> />
(Pontian) are about 300 m thick (Figure<<strong>br</strong> />
3). This series consists of shelf sands and<<strong>br</strong> />
sandy clay, above which a thin marl layer<<strong>br</strong> />
lies with supposed thickness of about 20 -<<strong>br</strong> />
30 m. Above the marl is deposited the<<strong>br</strong> />
layer of sandy clay, with a gradual transition<<strong>br</strong> />
to a <strong>br</strong>ick clay lying on the surface of<<strong>br</strong> />
the ground, and of the supposed thickness<<strong>br</strong> />
of about 80 m.<<strong>br</strong> />
Fig. 3. Open bench from which the clay is occasionally exploited<<strong>br</strong> />
No 4,<strong>2011</strong>. 23<<strong>br</strong> />
MINING ENGINEERING