%A"Kattan, Z [Atomic Energy Commission, Damascus (Syrian Arab Republic). Dept. of Geology and Nuclear Ores]" %D1994 %I; Atomic Energy Commission, Damascus (Syrian Arab Republic). Dept. of Geology and Nuclear Ores %2 %J[] %K54 ENVIRONMENTAL SCIENCES, AQUIFERS, BASALT, SYRIA, GROUND WATER, CHEMICAL PROPERTIES, ISOTOPE RATIO, RAIN WATER, CARBON 13, CARBON 14, EXPERIMENTAL DATA, 540350, SITE RESOURCE AND USE STUDIES %PMedium: X; Size: 75 p. %TChemical and environmental isotope study of the basaltic aquifer systems of Yarmouk Basin (Syria) %XThe water in the fissured basalt aquifer system, the Upper Jurassic aquifer of the Yarmouk Basin and the atmospheric precipitation have been investigated using chemical and environmental isotope techniques. The groundwaters flowing through the different aquifers are differentiated by their chemical ratios and their isotopic compositions. The evolution of chemical facies of groundwater from the recharge area towards the basin outlet is characterized by increasing of sodium and magnesium contents as a result of silicate leaching. The stable isotope compositions of precipitation and mountainous spring waters match the Mediterranean Meteoric Water Line, while the groundwaters from the central zone and from the major springs of the Yarmouk Basin are mixtures of freshwater, which is isotopically depleted and salty groundwater of Laja plateau area. The interpretations of tritium and radiocarbon ({sup 14} C) data indicate that the recharge zones of the groundwater in the Yarmouk Basin occur on the high-land of more than 1000 m of altitude. The residence time of the mountainous springs is short (of about 40 years or less). However, water ages corrected by Vogel`s concept and Gonfiantini`s Model show, in general, a range from 1000 to 11000 years for the central zone groundwater. The groundwater moves from the Mt. Hermon and Mt. Arab towards the central zone and from the north-east (i.e. the Laja plateau) towards south-west (i.e. the major springs). The radiometric flow velocities range from 20 to 60 m/year within the central zone, while the flow velocities from both sides of Mt. Hermon and Mt. Arab are lower (1-7 m/year). (author). 43 refs., 37 figs., 6 tabs. %0Technical Report %NAECS-G/RSS-88;Other: ON: DE95609812; TRN: SY9400318005373 %1 %CSyrian Arab Republic %Rhttps://doi.org/ Other: ON: DE95609812; TRN: SY9400318005373 INIS %GArabic