Geomorphology and hydrogeology of an exposed evaporite dome : the Dumre karst area, Central Albania

• Autorzy: Andreychouk Viacheslav , Eftimi Romeo , Nita Jerzy , Klimchouk Alexander

Identyfikatory

DOI

10.7306/gq.1624

• Języki publikacji: EN

Abstrakty

EN

The Dumre area, located in Central Albania, is distinguished by a landscape whose main features consist of low altitude, mosaic and irregular relief, and the presence of a large number of depressions with lakes. These features result from karst development related to the presence of a tectonically affected dome of Triassic evaporite rocks, mainly gypsum. Gypsum karstification has operated since the Pliocene, and the present-day geomorphological appearance of the area indicates an advanced, mature stage of karst development. Signs of this maturity include the widespread occurrence of large depressions, many of which are water-filled, forming lakes, the occasional presence of gypsum hills in the form of monadnocks, a thick “coating” of residual sediments largely isolating the karstic gypsum substrate from precipitation and surface waters, and the fragmentary pattern of a degraded river network. The karst character of the relief is largely “camouflaged” by clastic terrigenous and residual deposits of considerable thickness which cover the gypsum and form a caprock. At the present stage, the caprock is being strongly reshaped and eroded. Chemical analyses show a mean dissolved gypsum content of 1.9 g/l and mean dissolved NaCl content of 0.4 g/l. The mean flow rate of subaqueous springs is calculated as 1.84 m³. The density of gypsum is 2.3, and that of rock salt is 2.17, thus the total volume of gypsum dissolved each year is 47,420 m³ and of rock salt 10,680 m³, making a total volume of dissolved material released by the subaqueous springs in one year of 58,100 m3. This corresponds to a cubic void of side length 38.7 m.

Słowa kluczowe

EN

Albania; gypsum karst; Dumre area; chemical denudation

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Geological Quarterly
• Rocznik: 2021
• Tom: Vol. 65, No. 4
• Strony: art. no. 55
• Opis fizyczny: Bibliogr. 30 poz., fot., map., rys., tab., wykr.

Twórcy

autor

Andreychouk Viacheslav

• University of Warsaw, Faculty of Geography and Regional Studies, Krakowskie Przedmieście 30, 00-927 Warszawa, Poland

autor

Eftimi Romeo

• ITA Consult, Rr. Rreshit Çollaku, pll. 10/3/18, Tirana, Albania

autor

Nita Jerzy

• University of Silesia in Katowice, Faculty of Natural Sciences, Institute of Earth Sciences, Będzińska 60, 41-200 Sosnowiec, Poland

autor

Klimchouk Alexander

• National Academy of Sciences of Ukraine, Institute of Geological Sciences, Gonchara 55-b, 01-054, Kyiv, Ukraine

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