Hydrogeothermal Potential of the Strumica Valley with a Special Review of the Bansko Locality

Abstract

The Strumica valley with its skirt board with reference so tectonic sense belong to two structural-tectonica units. Serbo-Macedonian massif and the Vardar zone. The valley itself presents a tectonic graben which has been lowered in relation to the Belasica na d Smrdes horst, filled with Pliocene lake sediments while the skirt - board is made of granite-gneisses.The investigation-exploration drillhole B-1 with its 254 m. depth in the village Bansko discovered a deposit with geothermal fluid at a depth of 150 - 103 m. in the granite-gneisses. Transmitters of the heart from the deeper depths are the waters from vadose origin which use large open fractures in the granite-gneisses and the fresh granite which are found at great depths of seismically-active Belasica fault, are likely to present a geating source.

The hydrogeothermal potential of the Strumica valley is made upon the base of the results obtained from the investigation in the village Bansko, i.e. upon the base of the understanding of the dynamic reserves where 51 l/sec. with temperature of 70oC and 30 l/sec. with a temperature of 40oC have been taken. The effective usage is 22,4oC, where a heating energy of 1,15x1011 KJ or 3,19x107 KWh is obtained.

Concerning the hydrogeothermal investigations, the drilling should be continued, because of the determination of the spacious location of the collector to the Strumica valley geothermal fluid.