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Akindynos Kelepertsis Evangelos Tziritis Eustratios Kelepertzis Giorgos Leontakianakos Kostas Pallas 《Central European Journal of Geosciences》2009,1(3):241-250
Edipsos area, situated in northern Euboea, has been well known since ancient times for the existence of thermal springs. In order to assess the hydrogeochemical conditions, thermal and cold water samples were collected and analyzed by ICP method for major and trace elements. The results revealed the direct impact of seawater, a process which is strongly related to the major tectonic structures of the area. Seawater impact was confirmed by the Cl/Br and Na/Cl ionic ratios, as well as from statistical processing and graphical interpretation of the analytical results, which classified the sampled waters into three groups (two for cold waters and one for the thermal ones). Trace element ranges for thermal waters are: As (44–84 ppb), Pb (23–154 ppb), Ag (1–2 ppb), Mn (31–680 ppb), Cu (61–97 ppb), Cs (66–244 ppb), Se (0–76 ppb), Li (732–3269 ppb), Fe (0–1126 ppb), Sr (14000–34100 ppb), B (4300–9600 ppb). Compared with the chemical composition of other thermal springs from the Hellenic Volcanic Arc, Edipsos thermal waters are enriched in Ca2+, Na+, Cl?, SO4 2?, Li, B and K+, reflecting the influence from seawater. Cold waters are free of heavy metals compared with other natural waters and are characterized by good quality based on the major element chemistry. Finally, several geothermometers were applied in order to assess the reservoir temperatures, but none of them appear to be applicable, mainly due to the impact of seawater on the initial hydrogeochemistry of the geothermal fluids. 相似文献
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The Oxia mineralized granite is the product of differentiation in the external parts of the Florina magmatic mass. Acidic
hydrothermal solutions either of magmatic or of meteoric origin reacted with the upper tectonically fractured parts of the
Florina granite and became enriched in iron, thorium, uranium, zircon and rare-earth elements. The most abundant alteration
minerals are sericite and quartz, while the minerals of the mineralization bands include magnetite, hematite, thorite, monazite
and zircon. The outer parts of the Oxia granite made it easy the percolation of hydrothermal solutions from the deeper heater
to the upper cooler parts of the granite which acted as a hot spot. 相似文献
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