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Structure and metamorphism of the Dardania zone in the eastern part of Gjilan region (Kosovo)

Kutllovci Festim

Mining Science

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2021

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Vol. 28

93--102

EN

The Dardanian zone represents the western part of the Rhodope crystalline basement. This zone was structured and metamorphosed during the Hercynian and post Hercynian tectonic stages. The important aspects have been identified in the structure and metamorphism from this part of western Rhodopes. The geological setting of study region has clarified the most important aspects regarding: structural geology, deformation, tectonics, and metamorphism. The studied region represents an important node in the geology of Kosovo and beyond. In this region there is the border of the Vardar unit and the Serbo-North Macedonian tectonic unit (Dardania Massif). The Serbo-North Macedonian Massif (eastern part of Kosovo) structurally represents the upper part of Dacia and the innermost whole, compared to the Carpathian-Balkanids described above. The Crystalline belt of metamorphic rocks belongs to high-grade metamorphism. The rocks of the Upper Complex represent a volcano-sedimentary sequence that is metamorphosed only under greenschist facies conditions. The Lower Complex consisting of gneiss, micaschists and to a lesser extent amphibolites, quartzites, marbles and migmatites. The main event of the Hercynian tectonic period that structured the rocks forming in the Dardania zone is associated with the regional deformation D2. Its intensity is depending on the type of rocks, but it is noted an increase of the intensity from west to east. The associated schistosity S2(penetrating schistosity)is an axial plane schistosity of the isoclinals folds S0, S1. The schistosity S2 is homogenous, with an average strike direction of 345° and dip direction of 45°. The intersection lineation (L2) and the fold axis (B2) are very homogenous with the dip azimuth toward N (350°) and dip angle of 10°. The deformation D3 is associated with the crenulations of schistosity S3. The schistosity S3 represents the axial plan of the kink fold and crenulation. The schistosity S3 is very heterogeneous and it is difficult to arrive at conclusions regarding the average direction of this planar structure also to judge the kinematic aspects of the movement. Likewise, the axis of the crenulations B3 and L3 lineation represent relative heterogeneous linear structures. The deformation D4 is associated with the fracture schistosity S4. The schistosity S4 often show the axial plan of the open parallel folds. The schistosity S4 is homogenous with the range East–West with symmetric drop (in the N and S), by proving that we are dealing with a phase of deformation with an extensional tectonic regime (with the direction N–S).

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Petrographic characteristics and geochimstry in the part of Gjilani Region – Kosova

Kutllovci Festim

Mining Science

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2021

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Vol. 28

217--232

EN

The country of the Republic of Kosovo is situated in the central part of the Balkan Peninsula. In the Southwest, it is bordered by Albania, in the West by Montenegro, in the North and East by Serbia and in the Southeast by North Macedonia. In this scientific paper was done the identification detailed for rocks found on the researched region. it was done the identification detailed for rocks found in the researched region. The region research it’s done scale by 1:25 000 for comparison map of geology scale by 1:200 000 and paper will be treated the mineralogical content, petrography microscope preparation, and geochemistry. For the region of Gjilan, the analysis was performed: for large elements, for small elements and traces, and for rare soils. The processing of the analysis of large elements, traces, and sub-traces was performed in the geochemical-petrological software MINPET. Constructed diagrams show that we are dealing with rocks generated in differentiated geodynamic environments. Most of the rocks analyzed fall in the field of basic and acid rocks, and only a small part of them belong to the medium and ultrabasic rocks. Acid rocks are represented mainly by their Metamorphism types – gneiss and less of those ages with them younger – granite. They generally show geochemical features of volcanic type than orogenic in acid magmatism The purpose of the paper it the proposal of the paper is the identification rocks in the exploration zone for the preparation petrographic of microscope and processing of the analysis of large elements, traces, and sub-traces was performed in the geochemical-petrological software MINPET. It was done by the evidencing and detailed description of all the types of rocks found in the researched region. The samples were taken from those rocks for the preparation of petrography microscope preparation. The analyses were completed at the certified laboratory of Geology-Mining Faculty (Polytechnic University of Tirana) – Geosciences Institute.

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Stability analysis of security pillars with dimension 10 x 10 m fromed by ore of mineral body during the exploitation of the "Trepça" mine in Stantërg

Zeqiri Rafet, Gashi Jahir, Kutllovci Festim

Mining Science

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2019

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Vol. 26

37--44

EN

The "Trepça" mine in Stanterg consists from several mineral bodies, which if compared to the mineral bodies in the North and South part of mine can be found in different size. Their size in the horizontal plane ranges from 300–7000 m2 and as a matter of fact in the primary exploitation phase, only about two of thirds part of ore is used, while the remaining ore is used like pillars in the secondary stage with special methods. Since the beginning of exploitation at "Trepça" mine landfill, the security pillars are left in dimensions 10 x 10 m, on the schedule of chess fields, at distances from 16 to 20 m and all pillars at those distances are stable and over-dimensioned. In this paper we investigate the stability of the securing pillars with dimensions 10 x 10 m, with surface S = a * b = 10 * 10 = 100 m2 with a distance between them of 10 to 22 m. Pillar stability analysis aims to increase the safety factor along with the increase of exploitation depth.