Journal
EARTH AND PLANETARY SCIENCE LETTERS
Volume 237, Issue 3-4, Pages 710-728Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.epsl.2005.05.013
Keywords
volcanic activity; hydrothermal systems; halogens; volcano monitoring
Categories
Ask authors/readers for more resources
The halogen contents of thermal waters collected since 1979 at La Soufriere volcano (Guadeloupe, Lesser Antilles) are interpreted as a retarded record of magma degassing pulses dispersed into the hydrothermal system. The further the spring is located from the source, the larger the time delay and the older the event recorded in water chemistry. Using advection-dispersion transport models in porous media, we reconstruct the time-series of degassing pulses for the period 1971-1992 and show that it correlates with the seismic records. The 1975-1977 sismo-volcanic crisis at La Soufriere is thereby interpreted as the result of a magma intrusion at shallow depth (similar to 3 km) which likely began in approximately 1973 and degassed in a pulsatory regime during similar to 15 yr. The recent recrudescence of fumarolic and seismic activity could represent the initial stage of new magma injection. Measurement of halogen contents in hydrothermal waters collected around active volcanoes may provide a powerful tool for detection of the initial stages of magma intrusions. (c) 2005 Elsevier B.V All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available