Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor

literature data, semi-detailed poludetaljna<br />
geophysical investigations were carries out<br />
(using the gravimetric method), during<br />
1969 (Department for Geological and<br />
Geophysical Studies, Belgrade). There are<br />
no data on the extent and density of these<br />
investigations.<br />
GEOLOGICAL CHARACTERISTICS<br />
OF WIDER SURROUNDINGS OF<br />
THE CLAY DEPOSIT DUŠANOVAC<br />
Terrain of wider surroundings of the<br />
clay deposit Dušanovac, is situated on the<br />
leaf Negotin BMG [5], scale 1:100,000<br />
(Figure 2). The oldest sediments in this<br />
area are the Tithonian – Valanginian limestones<br />
near Mokranje and Rajac, which lie<br />
across the Senonian. They represent the<br />
allochthonous formations, taken from the<br />
west on the Mokranje cover. The Senonian<br />
sediments are developed in the flysch facies.<br />
He Senonian sediments are sandstones,<br />
shales and conglomerates. Their<br />
floor has not been established, until the<br />
Miocene strata are roof. In superposition<br />
terms, there are three parts:<br />
►lower, with replacement of sandstones<br />
and shales, and poorly<br />
marked traces of lamination;<br />
►intermediate, with observed alternation<br />
in sandstone, conglomerates<br />
and shales; and<br />
►upper, with sequences sandstoneshales,<br />
very rich with lamination<br />
and other texture forms. The Senonian<br />
flysch basin was probably the<br />
north-south direction, while the paleotransport<br />
of material came from<br />
the southeast, in the field of Moesian<br />
platform. The sediments generally<br />
fall in the west-southwest direction.<br />
The Neogene sediments [5] have a<br />
great extent. Based on rich fossil of molluscs<br />
and microfauna, the Neogene complex<br />
is divided into Thornton, Sarmatian,<br />
and Meothian and Pontian. The oldest<br />
Quaternary sediments are represented by<br />
lake gravels and sands with Elephas<br />
medridionalis. They lie in the form of isolated<br />
erosion patches, unconformably over<br />
the Sarmatian and Senonian. These creations<br />
are the products of a lake phase, during<br />
the Lower Pleistocene. Younger Quaternary<br />
formations are represented by the<br />
river- lake sediments.<br />
The Danube cut into older sediments<br />
four cterraces, which are made of gravel,<br />
loam and sand dust. Terrace gravels build<br />
up lower parts of profile, while loam and<br />
sand dusts, sometimes loess habit lie<br />
above the gravel. Such grain-size ratio<br />
points the creation of facies in the conditions<br />
of various dynamic phases of the<br />
Danube, with each individual cycle.<br />
No 4,2011. 21<br />
MINING ENGINEERING