Chemical and isotopic study of thermal springs and gas discharges from Sierra de Chiapas, Mexico
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2005
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| _version_ | 1876423252423737344 |
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| author | A. Nencetti |
| author_facet | A. Nencetti |
| contents | Chemical and isotopic study of thermal springs and gas discharges from Sierra de Chiapas, Mexico A. Nencetti F. Tassi G. Magro B. Capaccioni A. Minissale O. Vaselli J. L. Macías J. C. Mora Ciencias de la Tierra water Mexico Chiapas Isotopes chemistry Thermal water and gas discharges south-east of El Chichón volcano, Mexico are associated mainly with NW-SE orientedfault systems. Spring discharges include i) waters with Na-Cl composition and TDS>3000 mg/L; ii) waters with Ca-SO4 compositionand TDS values between 1400 and 2300 mg/L; iii) waters with Na-Cl composition and TDS of 800 to 2400 mg/L andsulphate content up to 650 mg/L and iv) waters with Ca-HCO3 composition and low salinity (TDS <250mg/L). Most of thesewaters are associated with free-gas discharges of N2 (up to 93 % by vol.), CO2 (2.4 to 31.2 % by vol.) and Ar (up to 1.25 % by vol.)with a predominant meteoric origin. H2S is present only in gas samples collected at El Azufre (up to 1.1 % by vol.). The δ13C CO2values are always below -9.7 (PDB) and suggest a partially biogenic origin for CO2.Chemical and isotopic features of spring discharges indicate that fluid circulation in the Sierra de Chiapas is mainly regulatedby meteoric waters that tend to infiltrate the upper and middle-Cretaceous carbonate units up to the lower Cretaceous-upperJurassic evaporitic formations (by López-Ramos, 1982). The latter provide the main source of the species in solution.No evidence for high-to-medium enthalpy systems at depth beneath the Sierra de Chiapas has been found. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844104 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.44 |
| format | Artículo científico |
| id | redalyc_56844104 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Chemical and isotopic study of thermal springs and gas discharges from Sierra de Chiapas, Mexico A. Nencetti Ciencias de la Tierra water Mexico Chiapas Isotopes chemistry Chemical and isotopic study of thermal springs and gas discharges from Sierra de Chiapas, Mexico A. Nencetti F. Tassi G. Magro B. Capaccioni A. Minissale O. Vaselli J. L. Macías J. C. Mora Ciencias de la Tierra water Mexico Chiapas Isotopes chemistry Thermal water and gas discharges south-east of El Chichón volcano, Mexico are associated mainly with NW-SE orientedfault systems. Spring discharges include i) waters with Na-Cl composition and TDS>3000 mg/L; ii) waters with Ca-SO4 compositionand TDS values between 1400 and 2300 mg/L; iii) waters with Na-Cl composition and TDS of 800 to 2400 mg/L andsulphate content up to 650 mg/L and iv) waters with Ca-HCO3 composition and low salinity (TDS <250mg/L). Most of thesewaters are associated with free-gas discharges of N2 (up to 93 % by vol.), CO2 (2.4 to 31.2 % by vol.) and Ar (up to 1.25 % by vol.)with a predominant meteoric origin. H2S is present only in gas samples collected at El Azufre (up to 1.1 % by vol.). The δ13C CO2values are always below -9.7 (PDB) and suggest a partially biogenic origin for CO2.Chemical and isotopic features of spring discharges indicate that fluid circulation in the Sierra de Chiapas is mainly regulatedby meteoric waters that tend to infiltrate the upper and middle-Cretaceous carbonate units up to the lower Cretaceous-upperJurassic evaporitic formations (by López-Ramos, 1982). The latter provide the main source of the species in solution.No evidence for high-to-medium enthalpy systems at depth beneath the Sierra de Chiapas has been found. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844104 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.44 |
| title | Chemical and isotopic study of thermal springs and gas discharges from Sierra de Chiapas, Mexico |
| topic | Ciencias de la Tierra water Mexico Chiapas Isotopes chemistry |
| url | https://www.redalyc.org/articulo.oa?id=56844104 |