A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ

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5.2 Magmatic rocks exploitation
5.2.1 Andesite exploitation
The common andesite exists in the Apuseni
Mountains, Eastern Carpathians (Oas, Gutai,
Tibles, Rodna, Bargau, Calimani, Gurghiu,
Harghita mountains) and in South
Carpathians (Parvu et al., 1977). The
distribution of the andesite quarries on
geostructural units is shown in figure 11.
Figure 11. Andesite quarries allocate on
geostructural units (1=Eastern Carpathians;
2=Apuseni Mountains; 3=Southern
Carpathians).
This rock was exploited in 233 quarries
from 14 counties: Alba, Arad, Bihor, Bistrita
Nasaud, Brasov, Caras Severin, Cluj,
Covasna, Harghita, Hunedoara, Maramures,
Mures, Satu Mare, Suceava.
Ornamental andesite quarries exists in
many locations but the demand was not very
high on time and the surface exploitations
were existing only in Cluj (Bologa) and
Hunedoara (Dealul Magura, Pietroasa)
counties.
5.2.2 Tuff exploitation
In Romania exist many magmatic tuff levels
and sorts. Some of they (dacite tuff, andesite
tuff, basalt tuff) were extracted (see fig. 12).
Figure 12. Tuff sorts exploited in quarries
(1=dacitic tuff; 2 = andesite tuff; 3= basalt
tuff).
60 Dacite tuff quarries are known in Alba,
Arad, Arges, Brasov, Cluj, Maramures,
Prahova, Salaj, Satu Mare and Valcea
counties. Other exploited tuffs are andesite
tuff, exploited in Arad (Calvaria), Caras
Severin (Glamboca), Harghita (Lazaresti)
and Hunedoara (Deva, Bacia) counties and
basalt tuff, extracted in Brasov (Comana de
Sus, Mateias), Covasna (Malnas Bai),
Hunedoara (Birtin) counties.
5.2.3 Granite exploitation
Granite deposits are very numerous in
Romania. They exist in the Apuseni
Mountains, South Carpathians and North-
Dobrogean Structogen (Parvu et al., 1977).
58 Common granite quarries were
registered in Arad, Caras Severin, Cluj, Gorj,
Hunedoara, Mehedinti, Satu Mare and
Tulcea counties. Were identified only two
ornamental granite quaries, in Tulcea
counties: Dealul Serparu and Greci.
5.2.4 Dacite exploitation
The dacite was described for the first time as
a volcanic rock type in Romania at Poieni,
which is the “locus tipicus”. It widespread in
the territory of the Romanian Carpathians
but for economic purposes there are only
three main zones: Vladeasa Massif (Apuseni
Mountains), Rodna Mountains (Eastern
Carpathian) and western part of the Southern
Carpathians (Marinescu et al., 2003).
The dacite was intense extracted in 47
quarries from Alba, Bistrita Nasaud, Cluj,
Hunedoara, Maramures and Salaj counties.
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