Variations in the Cl, SO4, δD and δ18O in Water from Thermal Springs near Acapulco, Guerrero, Mexico, Related to Seismic Activity

Abstract

ABSTRACT

Geochemical Monitoring of Cold Waters during Seismicity: Implications for Earthquake-induced Modification in Shallow Aquifers

“…The ample literature on the subject [see Thomas (1988) and cited references; Toutain and Baubron (1999) and literature therein] and more recently Ramirez-Guzman et al (2005), Song et al (2005) shows that seismogenic-induced geochemical modifications occur in anomalous fluids (i.e., thermal waters, acidic gases, etc.) circulating in seismic-prone areas.…”

Hydrochemical Changes in Spring Waters in Taiwan: Implications for Evaluating Sites for Earthquake Precursory Monitoring

“…In the past, substantive evidence in support of many diverse kinds of precursors, including hydrological and chemical changes in subsurface fluids prior to or at the same time as a large earthquake, has been found. Among these are valuable, insightful precursory changes in gases involved in both hydrothermal processes, like Rn, He, CO 2 , CH 4 , H 2 , Ar and N 2 , and in water chemistry, like Cl − , F − , NO 3 − and SO 4 2− (Hauksson 1981;King 1986;Tsunogai andWakita 1995, 1996;Sugisaki et al 1996;Toutain et al 1997;Chyi et al 2005;Italiano et al 2005;Ramirez-Guzman et al 2005;Walia et al 2005;. Such geochemical anomalies are generally associated with changes in a subsurface water circulating system in the process of earthquake generation (Thomas 1988;Rojstaczer and Wolf 1992;Muir-Wood and King 1993;Rojstaczer et al 1995;Sugisaki et al 1996).…”

Preface to the Special Issue on Geochemical Investigations on Geohazards

“…From case studies in Italy, Italiano et al (2005) demonstrate that cold waters, which are normally exploited for drinking purposes, can also suffer from geochemical modifications induced by seismicity. Ramirez-Guzman et al (2005) report geochemical variations of hot springs in Mexico and suggest that they are sensitive to seismic activity and suitable for further monitoring. After more than a year of monitoring in Taiwan, Song et al (2005) suggest that those sites with hot springs from deeper reservoirs and artesian springs from a smaller subsurface water body would be more sensitive and suitable for the purposes of earthquake precursory monitoring.…”

“…In the first group of five papers, long-term monitoring results have been widely used as a basic approach to the provision of important data to aid better understanding and surveillance of earthquake activity (Italiano et al 2005;Ramirez-Guzman et al 2005;Song et al 2005;Chyi et al 2005;Walia et al 2005b). From case studies in Italy, Italiano et al (2005) demonstrate that cold waters, which are normally exploited for drinking purposes, can also suffer from geochemical modifications induced by seismicity.…”