Skip to main content
Article thumbnail
Location of Repository

Spring and surface water quality of the Cyprus ophiolites\ud \ud

By C. Neal and P. Shand


A survey of surface, spring and borehole waters associated with the ophiolite rocks of Cyprus shows five broad water types (1) Mg-HCO3, (2) Na-SO4-Cl-HCO3, (3) Na-Ca-Cl-SO4-OH-CO3, (4) Na-Cl-SO4 and (5) Ca-SO4. The waters represent a progression in chemical reactivity from surface waters that evolve within a groundwater setting due to hydrolysis of the basic/ultrabasic rock as modified by CO2-weathering. An increase in salinity is also observed which is due to mixing with a saline end-member (modified sea-water) and dissolution of gypsum/anhydrite. In some cases, the waters have pH values greater than 11. Such high values are associated with low temperature serpentinisation reactions. The system is a net sink for CO2. This feature is related not only to the hydrolysis of the primary minerals in the rock, but also to CaCO3 or Ca-Mg-CO3 solubility controls. Under hyperalkaline conditions, virtually all the carbon dioxide is lost from the water due to the sufficiently high calcium levels and carbonate buffering is then insignificant. Calcium sulphate solubility controls may also be operative when calcium and sulphate concentrations are particularly high

Publisher: European Geosciences Union
Year: 2002
DOI identifier: 10.5194/hess-6-797-2002
OAI identifier:

Suggested articles


  1. (1973). A new type of strongly hydroxide-sodiumcalcium water at Kulasi (Bosnia)
  2. (1994). A sulfur isotopic profile through the Troodos ophiolite, Cyprus: Primary composition effects of seawater hydrothermal alteration.
  3. (1998). An assessment of excess carbon dioxide partial pressures in natural waters based on pH and alkalinity measurements. doi
  4. (1988). Bicarbonate estimation from alkalinity determinations for acidic low alkalinity natural waters: theoretical considerations. doi
  5. (1984). Calcium and magnesium hydroxide precipitation from alkaline groundwaters in Oman, and their significance to the process of serpentinization. doi
  6. (1979). Environmental isotope survey (Cyprus). Final Report of International Atomic Energy Agency,
  7. (1992). Forestry impact on upland water quality.
  8. (1967). Geochemical evidence of present day serpentinization.
  9. (1993). Geochemistry, groundwater and pollution.
  10. (1990). Groundwater quality in the region between
  11. (1983). Hydrogen generation from mantle source rocks in Oman. doi
  12. (1989). Igneous Petrogenesis: A global tectonic approach. doi
  13. (1972). Metamorphic assemblages and the direction of flow of metamorphic fluids in four instances of serpentinization.
  14. (1973). Oxygen and hydrogen isotope studies of the serpentinization of ultramafic rocks in oceanic environments and continental ophiolite complexes. doi
  15. (1985). Past and present serpentinisation of ultramafic rocks; an example from the Semail Ophiolite Nappe of Northern Oman. In:
  16. (1978). Present day serpentinization in
  17. (1971). Temperatures of serpentinization of ultramafic rocks based on 18O/16O fractionation between co-existing serpentine and magnetite. doi
  18. (1977). The alkalinity and the chemical composition of springs issuing from peridotites.
  19. (1997). The geochemistry of natural waters. PrenticeHall, Upper Saddle River,
  20. (1963). The geology and gravity anomalies of the Troodos Massif,
  21. (1984). The geology of the XerosTroodos area.
  22. (1986). The Hydrogeology of the Oman Mountains.
  23. (1971). The relationship between fluids in some fresh Alpine-type ultramafics and possible modern serpentinization, western United States.
  24. (1998). The significance of dissolved carbon dioxide in major lowland rivers entering the North Sea. doi
  25. (1978). Thermal mineral waters of Cyprus. Int. Cong. on thermal waters, geothermal energy and volcanism of the Mediterranean area.
  26. (1995). User’s guide to PHREEQC -a computer program for speciation, reaction-path, advective-transport, and inverse geochemical calculations . Water resources investigations report 95-4227.

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.