Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, Ano Ilissia, 15784, Athens, Greece.
Environ Monit Assess. 2018 Apr 4;190(5):265. doi: 10.1007/s10661-018-6643-1.
A radiological and hydrochemical study has been conducted on thermal and fresh groundwater samples of northern Euboea Island and eastern central Greece. Both areas are characterized by complex geology and are renowned since antiquity for their hot springs, that are exploited for therapeutic spa purposes until today. The aim of the study was to combine radiological and hydrochemical data in order to achieve a holistic water quality assessment with insights into the geology of the study areas. All samples were characterized with respect to their major and trace ion and element composition, as well as activity concentrations of Rn, Ra, Ra, Th, and K. The samples demonstrated elevated natural radioactivity and U concentrations, especially in some locations of the Kamena Vourla area, reaching 179 Bq/L Rn, 2.2 Bq/L Ra, 2.9 Bq/L Ra, and 17 μg/L U. The estimated circulation depth of thermal groundwater ranges between 250 m in central Greece and 1240 m in north Euboea study area, whereas the calculated water residence times range between 27 and 555 years. Our data suggest the possible presence of an unknown until know U-rich plutonic rock formation in Kamena Vourla area and immiscibility of the fresh and thermal groundwaters in the studied areas.
对北埃维亚岛和希腊中东部的热泉和淡水进行了放射性和水化学研究。这两个地区的地质结构都很复杂，自古以来以温泉而闻名，这些温泉至今仍被用于温泉疗养。该研究的目的是结合放射性和水化学数据，对研究区域的整体水质进行评估，并深入了解其地质情况。所有样本的主要和痕量离子及元素组成以及Rn、Ra、Ra、Th 和 K 的活度浓度均进行了分析。样本显示出较高的天然放射性和 U 浓度，特别是在卡马纳武尔拉地区的一些地方，Rn 浓度达到 179 Bq/L，Ra 浓度达到 2.2 Bq/L，Ra 浓度达到 2.9 Bq/L，U 浓度达到 17μg/L。估算的热地下水循环深度在希腊中部为 250 m，在北埃维亚岛研究区为 1240 m，而计算出的水停留时间在 27 到 555 年之间。我们的数据表明，卡马纳武尔拉地区可能存在一种未知的富含 U 的深成岩，并且研究区域的淡水和热水不相容。
