Institut za rudarstvo i metalurgiju Bor

GEOLOGY COMPOSITION AND
TECTONIC SYSTEM OF THE
WIDER SURROUNDING OF
BANJSKA
When describing mapping units allocated
to Rogozna, special attention is given
to those units that are important for leadzinc
mineraliztion. These are the creations
multi phase tertiary magmatism. Pre Tertiarry
structures can be grouped as
lithostratigraphic units: metamorphite Paleozoic,
and permo-Triassic creation, Diabase-hornstone
formations ultra-basic rocks
and Senonian sediments.
The data on these units were collected
from the literature. Most of the interpreters
used basic geological map sheet Novi Pazar
1:100 000 [12].
Metamorphite Paleozoic structures include
Old Paleozoic (so-called „series
Rogozna”) and Late Paleozoic Metamorphite.
The series Rogozna is present by
amphibole, amphibolite, muscovite and
sericite-chlorite schists, quartzite, crystalline
limestone, metamorphosed diabase,
gneiss, lepidolite and biotite shale. Metamorphite
of Late Paleozoic rocks are represented
by a lower degree of metamorphism:
phyllite, metamorphosed sandstone, limestone
and albite-chlorite shale. Permo-
Triassis creations are discordance over Late
Paleozoic metamorphite and are consisted
by clastic, mainly quartz sandstones, quartz
conglomerates and breccias, in a characteristic
rapid removal. Lower and Middle Triassic
of Banjska river are consisted by
marled-sandy, marled and massive limestone.
Age of the diabase-hornstone formation
was determined as Upper Jurassic (Oxford-Kimmeridgian).
Magmatites are presented
by the products of Gabbro magma:
Diabase, spilite, basalt, Gabbro and various
transitional rocks. Since the sediments are
represented by breccias, sandstones often,
slates, hornstone, marl, marled limestone
and clay shale. The complex consists of
ultrabasic rocks harzburgite, much less
share a dunite, diallage and serpentinite. By
the opinion of M. Urosevic and others.
(1973) these rocks represent the products of
initial magmatism of Paleozoic Geosyncline.
Under the new understanding, these rocks
are of Jurassic period. In base of Senonian
flysch sediments there are mostly basal
breccias and conglomerates, massive reef
limestone, marled limestone and marl where
real flysch sediments were developed which
can be divided in two packages. Lower
package is characterized bythe marled-sandy
sediments with rare micro-conglomerates.
The upper package is presented by sandstone
stratified in thick beds, up to ten meters.
Between the sandstone banks there are
periodically thin layers of slates, Marl and
pelite-morphite limestone.
During the Tertiary Rogozna is affected
by intense igneous activity, which took
place in three clearly divided phases. According
to the mineral composition of volcanic
rocks of the first phase correspond
mainly to dacite-andesite. Only a few of
them are typical dacite and quartzlatite.
Pyroclastic rocks have little distribution,
and they are volcanic conglomerates, tuffs
and volcanic pelite . Volcanic rocks of the
second phase are presented by quartzlatite
and latite. Quartzlatite masses are mostly
filled holes of volcano or volcano feeder
channels, or a shallow intrusion of wired or
irregular shapes. The second phase of volcanic
pyroclastic rocks are with characteristic
composition: tuffs, tuffite and conglomerate
rocks are in the lowest horizons, and
higher packages, which are very thick (350
m) are characterized by volcanic conglomerates,
tuffs, volcanic breccia in weaker or
stronger fused pyroclastic rocks of ignimbrite
character. Volcanic rocks of the third
No 1,2010. 160
MINING ENGINEERING