Chemical and isotopic composition of geothermal discharges from the Puyehue-Cordón Caulle area (40.5◦S), Southern Chile
| Author | dc.contributor.author | Sepúlveda, Fabián | es_CL |
| Author | dc.contributor.author | Dorsch, Klaus | |
| Author | dc.contributor.author | Lahsen Azar, Alfredo | es_CL |
| Author | dc.contributor.author | Bender, Steffen | es_CL |
| Author | dc.contributor.author | Palacios Monasterio, Carlos | es_CL |
| Admission date | dc.date.accessioned | 2014-01-09T17:31:52Z | |
| Available date | dc.date.available | 2014-01-09T17:31:52Z | |
| Publication date | dc.date.issued | 2004-05-10 | |
| Cita de ítem | dc.identifier.citation | Geothermics 33 (2004) 655–673 | en_US |
| Identifier | dc.identifier.other | doi:10.1016/j.geothermics.2003.10.005 | |
| Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/126122 | |
| General note | dc.description | The Puyehue-Cordón Caulle area (40.5◦S) hosts one of the largest active geothermal systems of Southern Chile, comprising two main thermal foci, Cordón Caulle and Puyehue. Cordón Caulle is a NW-trending volcanic depression dominated by fumaroles at the top (∼1500 m) and boiling springs at the northwest end (∼1000 m). In the latter, the alkaline-bicarbonate composition of the springs with low Mg (<0.06 mg/l) relative to the local meteoric waters (∼5 mg/l), low chloride (<60 mg/l), high silica (up to 400 mg/l) and 18O– D values close to the Global Meteoric Water Line (GMWL), in combination with the large outflow (100 l/s), suggest the existence of a secondary steam-heated aquifer overlying a main vapor-dominated system at Cordón Caulle. Subsurface temperatures of the secondary aquifer are estimated to be about 170–180 ◦C (corrected silica geothermometers). The Puyehue thermal area, on the other hand, includes Mg-rich hot springs discharging along stream valleys, with maximum temperatures of 65 ◦C and a 18O– D signature resembling the local meteoric composition, which suggests that the surface manifestations contain a reservoir component that is strongly diluted by meteoric waters. Topographic/hydrologic and chemical characteristics suggest that Cordón Caulle and Puyehue represent two separate upflows. | en_US |
| Lenguage | dc.language.iso | en | en_US |
| Publisher | dc.publisher | Elsevier Ltd. | en_US |
| Type of license | dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Chile | * |
| Link to License | dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | * |
| Keywords | dc.subject | Chloride; Acid-sulfate; Bicarbonate; Heat loss; Reservoir; Temperature; Silica sinter; Geochemistry; Puyehue; Cordón Caulle; Chile | en_US |
| Título | dc.title | Chemical and isotopic composition of geothermal discharges from the Puyehue-Cordón Caulle area (40.5◦S), Southern Chile | en_US |
| Document type | dc.type | Artículo de revista |
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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile