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Streaming potential in volcanic rocks from Mount Pelée

Abstract : Streaming potential and electric conductivity have been measured in a laboratory on 11 consolidated samples coming from five deposits of the different evolutionary stages of Mount Pelde volcano. The streaming potential coupling coefficient ranges from-35 to-4905 mV MPa-1 and increases with increasing permeability. This increase is mainly due to the dependency of rock effective conductivity with permeability. The permeability of the samples varies from 0.146x10-12 to 34x10-12 m 2. The zeta potential, at pH-7 and water conductivity of 2.1x10-4 S m-l• is relatively small for the majority of the samples. It ranges from-4 to-19 reV. According to water conductivity analysis on Mount Pel•e, streaming potential coupling coetficients of-25 to-406 mV MPa-1 can be expected for this volcano.
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Laurence Jouniaux, Marie-Lise Bernard, Maria Zamora, Jean-Pierre Pozzi. Streaming potential in volcanic rocks from Mount Pelée. Journal of Geophysical Research, American Geophysical Union, 2000, 105, pp.8391-8401. ⟨hal-01977535⟩



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