PUMA
Istituto di Geoscienze e Georisorse     
Gerardo J., Nuti S., D'Amore F., Seastres J. J., Gonfiantini R. Isotopic evidence for magmatic and meteoric water recharge and the processes affecting reservoir fluids in the Palinpinon geothermal system, Philippines. In: Geothermics, vol. 22 (5/6) pp. 521 - 533. Elsevier, 1993.
 
 
Abstract
(English)
Stable isotopic compositions of meteoric and geothermal waters indicate that the Palinpinon geothermal system of Southern Negros is fed by a parent water that originated from a mixture of local meteoric (80%) and magmatic (20%) waters. The meteoric water has an isotopic concentration of −8.5‰ and −54‰ in 18O and 2H, respectively, which corresponds to an average infiltration altitude of about 1000 m above sea level. With exploitation of the system and injection of wastewaters to the reservoir, the stable isotopic composition became heavier due to significant mixing of geothermal fluids with injection waters. Incursion of cooler meteoric waters, which is confirmed by the presence of tritium, also leads to the formation of acid-sulfate waters. Stable isotopes are effective as “natural tracers” to determine the origin and mixing of different fluids in the reservoir.
URL: http://https://www.journals.elsevier.com/geothermics
Subject isotopic composition
Philippines


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