Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan
Valle delCura develops within a N-S thrust system in the high cordillera of San Juan. This valley has various geothermal manifestations, where the hot springs of Despoblados are highlighted. The aim of the work was to study the geothermal phenomenon by magnetotellurics, in order to obtain the geomet...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v71_n4_p_Barcelona http://hdl.handle.net/20.500.12110/paper_00044822_v71_n4_p_Barcelona |
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paper:paper_00044822_v71_n4_p_Barcelona2023-06-08T14:26:44Z Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan Deep fluid circulation Geothermics Thrust and fold belt electrical resistivity fold and thrust belt geothermal system magnetotelluric method thermal spring Argentina San Juan [Argentina] Valle del Cura Cura Valle delCura develops within a N-S thrust system in the high cordillera of San Juan. This valley has various geothermal manifestations, where the hot springs of Despoblados are highlighted. The aim of the work was to study the geothermal phenomenon by magnetotellurics, in order to obtain the geometry of the system in depth. High frecuency (1000 – 10 Hz) and broad band (10 – 0.03 Hz) were recorded in 47 and 18 sites. Robust signal processing and standard parameters analysis were performed. 2-D inversion of the data was carried out to obtain the electrical resistivity distribution through 5 models and a single pseudo 3-D model. The models defined 2 conductive anomalies, one directly linked with the hot springs and the other one without superficial manifestation. Both anomalies show structural control and a deep circulation of geothermal fluids. The proposed Despoblados geothermal system has plumes like upwelling zones channeled by faults that surround the valley and downwelling zones linked to the main thrusts, were the meteoric water leaks. Although there is no evidence of shallow lithostratigraphic level as reservoir, is not discarded the existence of one bellow 4000 m depth. The geothermal fluid circulation could be by normal geothermal gradient convection or favored by a remnant thermal anomaly from the Cerro de Vidrio volcanic event (1.5 Ma). Finally, some questions remains about the existence of a main geothermal systems that groups the apparent isolated manifestations on Valle del Cura. © 2014, Revista de la Asociacion Geologica Argentina. All right reserved 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v71_n4_p_Barcelona http://hdl.handle.net/20.500.12110/paper_00044822_v71_n4_p_Barcelona |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Deep fluid circulation Geothermics Thrust and fold belt electrical resistivity fold and thrust belt geothermal system magnetotelluric method thermal spring Argentina San Juan [Argentina] Valle del Cura Cura |
| spellingShingle |
Deep fluid circulation Geothermics Thrust and fold belt electrical resistivity fold and thrust belt geothermal system magnetotelluric method thermal spring Argentina San Juan [Argentina] Valle del Cura Cura Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan |
| topic_facet |
Deep fluid circulation Geothermics Thrust and fold belt electrical resistivity fold and thrust belt geothermal system magnetotelluric method thermal spring Argentina San Juan [Argentina] Valle del Cura Cura |
| description |
Valle delCura develops within a N-S thrust system in the high cordillera of San Juan. This valley has various geothermal manifestations, where the hot springs of Despoblados are highlighted. The aim of the work was to study the geothermal phenomenon by magnetotellurics, in order to obtain the geometry of the system in depth. High frecuency (1000 – 10 Hz) and broad band (10 – 0.03 Hz) were recorded in 47 and 18 sites. Robust signal processing and standard parameters analysis were performed. 2-D inversion of the data was carried out to obtain the electrical resistivity distribution through 5 models and a single pseudo 3-D model. The models defined 2 conductive anomalies, one directly linked with the hot springs and the other one without superficial manifestation. Both anomalies show structural control and a deep circulation of geothermal fluids. The proposed Despoblados geothermal system has plumes like upwelling zones channeled by faults that surround the valley and downwelling zones linked to the main thrusts, were the meteoric water leaks. Although there is no evidence of shallow lithostratigraphic level as reservoir, is not discarded the existence of one bellow 4000 m depth. The geothermal fluid circulation could be by normal geothermal gradient convection or favored by a remnant thermal anomaly from the Cerro de Vidrio volcanic event (1.5 Ma). Finally, some questions remains about the existence of a main geothermal systems that groups the apparent isolated manifestations on Valle del Cura. © 2014, Revista de la Asociacion Geologica Argentina. All right reserved |
| title |
Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan |
| title_short |
Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan |
| title_full |
Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan |
| title_fullStr |
Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan |
| title_full_unstemmed |
Geothermal system of Despoblados by magnetotelluric data, Valle del Cura, San Juan |
| title_sort |
geothermal system of despoblados by magnetotelluric data, valle del cura, san juan |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v71_n4_p_Barcelona http://hdl.handle.net/20.500.12110/paper_00044822_v71_n4_p_Barcelona |
| _version_ |
1768542915285483520 |