E3S Web Conf.
Volume 98, 201916th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference)
|Number of page(s)||5|
|Section||Geochemistry of Natural Waters: From Atmospheric Precipitations to Deep Brines|
|Published online||07 June 2019|
Chemical and stable isotope composition of surface and groundwater in the surroundings of the Los Humeros Caldera, Puebla, Mexico
Departamento de Geología, Centro de Investigación y Educación Superior de Ensenada (CICESE) Ensenada, Mexico
2 Istituto de Geocienze y Georizore, CNR, Pisa Italy
3 Instituto de Investigaciones Quimico Biologicas, Universidad Michocana de San Nicolas Hidalgo (UMSNH) Morelia, Mexico
4 Departamento de Ingeniería Geomática y Hidráulica, Universidad de Guanajuato, Guanajuato, Mexico
* Corresponding author: email@example.com
It is important to develop a regional hydrogeological model to identify possible recharge and discharge areas for a sustainable use of a geothermal reservoir. The Los Humeros geothermal area is situated within five surficial watersheds and coveres an area of more than 15.000 km2. A total of 208 well and spring samples were collected between June 2017 and November 2018. The stable isotope data for this region define a regression line of δDH2O = 8.032·δ18O + 12 and indicate that groundwater is recharged by regional precipitation. At least 39 groundwater wells, with a maximum temperature of 35 °C, show temperatures above the reported mean average surface temperature of 15 °C. Characteristic elements for geothermal reservoir fluids (B, Li, As) are also present in these groundwaters, indicating a possible connection between the reservoir fluid and the local groundwater through local fracture systems. Concentration of B in these hot wells is between 150 and 35000 ppb.
© The Authors, published by EDP Sciences, 2019
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