Institut za rudarstvo i metalurgiju Bor

A characteristic of these rocks is serpentinization-serpentinited
Peridotite and serpentinites.
Hydrothermal processes of tertiary
magmatism caused magnesite venation and
wires. The processes of decomposition are
expressed in the serpentinites (nontronite,
wire magnesite). Tertiary magmatism indicates
granite Intrusions followed by the
volcanic processes tracked in several sequences,
when volcanic rocks (daciteandesite,
rhyodacite, pyroxene-amphibolite
andesite, tuffs and conglomerates) were
formed. The thermal waters occurred in
these described rocks [7].
Reservoir of mineral waters constitutes
complex of carbonate Mesozoic and
Paleozoic rocks. Most likely this is a Triassic
limestone, given that they were
briefly exposed to erosion during the Jurassic
and lower Cretaceous. Water in the
reservoir originates from the semi-arid
climate (20,000 yr.) and have a temperature
of about 120 0 C [3].
The springs of thermo-mineral water of
Banjska are located on the land of St. Sava
monastery, on the south-eastern slopes of
Rogozna. The occurrence of thermo mineral
water of Banjska is directly related to
fault structure, so that they appear to contact
serpentinites and cretaceous flysch
(Fig.1.). In the village there were noted a
total of 4 springs, but 3 of them are
capped. Two of them are in the village,
with yield of Q1= 1 l/sec, Q2 = 0.5 l/sec (in
the courtyards of the private houses), the
third is in the Spa Pool, with the yield
Q3 = 1 l/sec, and the fourth is at the monastery
(Milutin city) that is located on the
tufa terrace, with the yield of Q4 = 5 l/sec.
Thickness of tufa terrace is > 20 m.
It was created by the separation of
calcium - carbonate from the thermo mineral
water spring at the monastery, on the
basis of which it is interpreted the genesis
of mineral water. In zone Banjska there
were extracted phenomenon of marble and
limestone on the surface of the terrain.
Thermo-mineral water is formed in these
rocks. Serpentinites are a transit zone and
affect the chemical composition. Warming
water is directly related to tertiary volcanic
process [5].
From the monastery, according to the
latest available data, a yield about 5 l / s,
with temperature of 54 o C. Almost certainly
it could be said that the early yield
was much higher, when a large amount of
deposited tufa is shown. This source is
capped for the spa, but due to a damage of
piping, water does not come to the spa.
The observed yield regime capacity
and water temperature in the period August-November
2004 and September-
November 2008 in the spa pool is stable,
indicating by deep siphonal circulation of
thermal waters. Yield is little changed in
interval of 0.8-1.2 l / s. Water temperature
is 40.5 0 C [6].
No 1,2010. 162
MINING ENGINEERING