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Authors: Martin-Del Pozzo, A.L.*
Aceves, F.*
Espinasa, R.*
Aguayo, A.*
Inguaggiato, S.*
Morales, P.*
Cienfuegos, E.*
Title: Influence of volcanic activity on spring water chemistry at Popocatepetl Volcano, Mexico
Title of journal: Chemical geology
Series/Report no.: 190(2002)
Publisher: Elsevier
Issue Date: 2002
Keywords: Volcano monitoring
Spring water chemistry
Abstract: The results of the 7 years (1994-2000) of monthly monitoring of spring water before and during eruptions show response to volcanic activity. Low salinity and temperature characterize most of the springs, which are located on the flanks of Popocatepetl Volcano. The pH ranges from 5.8 to 7.8 and temperature from 3 to 36 jC. Oxygen and hydrogen isotopic data show that the water is of meteoric origin, but SO4 2 , Cl , F , HCO3 , B, and SO4 2- /Cl- variations precede main eruptive activity, which is considered linked to influx of magmatic gases and acid fluids that react with sublimates and host rock and mix with the large water system. Na +, Ca2 + , SiO2 and Mg2 + concentrations in the water also increased before eruptive activity. The computed partial pressure of CO2 in equilibrium with spring waters shows values higher than air-saturated water (ASW), with the highest values up to 0.73 bar of pCO2. Boron is detected in the water only preceding the larger eruptions. When present, boron concentration is normally under health standard limits, but in two cases the concentration was slightly above. Other components are within health standard limits, except for F- in one spring.
Appears in Collections:05.02.01. Geochemical data
04.08.06. Volcano monitoring
04.04.12. Fluid Geochemistry
Papers Published / Papers in press

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