Hydrogeochemistry and Preliminary Reservoir Model of the Platanares Geothermal System, Honduras, Central America
- Key words
- Exploration; General; Case Studies; Reservoir Engineering; Geothermometers; Trace Elements; Isotopes; Volcanics; Deuterium; Models; Fractured Systems; CO2; Nh4; NH3; Boron; Empress National de Energia Electrica; USGS; Los Alamos National Laboratory; Valle
- Location
- Platanares, Honduras
- Conference
- Geothermal Resources Council Transactions
- Year
- 1986
- Session
- Exploration; Geochemical surveys; Isotopes; Geothermometers;
- Language
- English
Abstract
A detailed hydrogeochemical investigation has been performed at Platanares, Honduras in preparation for shallow geothermal exploration drilling. Platanares is not associated with any Quaternary volcanism but lies in a tectonic zone of late Tertiary to Quaternary extension. Thermal fluids are characterized by pH between 7 and 10, C1<40 mg/l, HCO3>SO4, C1, B<17 mg/l, Li<4 mg/l and As<1.25 mg/l. Various geochemical indicators show that mixing of hot and cold end member fluids is an important hydrologic process at this site. Geothermometers indicate the geothermal system equilibrated at roughly 225°C while trace element chemistry indicates the reservoir resides in Cretaceous red beds of the Valle de Angeles Group. Based on the discharge rates of thermal features, the minimum power output of the Platanares geothermal site is about 45 MW (thermal).
Copyright 1986, Geothermal Resources Council. Readers who download papers from this site should honour the copyright of the original authors, and may not copy or distribute the work further without the permission of the original publisher.