The scaling relationship between self-potential and fluid flow on Masaya volcano, Nicaragua

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The concurrent measurement of self-potential (SP) and soil CO{sub 2} flux (F{sub s}{sup CO2}) in volcanic systems may be an important tool to monitor intrusive activity and understand interaction between magmatic and groundwater systems. However, quantitative relationships between these parameters must be established to apply them toward understanding processes operating at depth. Power-law scaling exponents calculated for SP and F{sub s}{sup CO2} measured along a fault on the flanks of Masaya volcano, Nicaragua indicate a nonlinear relationship between these parameters. Scaling exponents suggest that there is a declining increase in SP with a given increase in F{sub s}{sup CO2}, until ... continued below

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4 pages

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Lewicki, J. L.; Hilley, G. E. & Conner, C. November 11, 2003.

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The concurrent measurement of self-potential (SP) and soil CO{sub 2} flux (F{sub s}{sup CO2}) in volcanic systems may be an important tool to monitor intrusive activity and understand interaction between magmatic and groundwater systems. However, quantitative relationships between these parameters must be established to apply them toward understanding processes operating at depth. Power-law scaling exponents calculated for SP and F{sub s}{sup CO2} measured along a fault on the flanks of Masaya volcano, Nicaragua indicate a nonlinear relationship between these parameters. Scaling exponents suggest that there is a declining increase in SP with a given increase in F{sub s}{sup CO2}, until a threshold (log F{sub s}{sup CO2} {approx} 2.5 g m{sup -2}d{sup -1}) above which SP remains constant with increasing F{sub s}{sup CO2}. Implications for subsurface processes that may influence SP at Masaya are discussed.

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4 pages

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OSTI as DE00820275

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  • Eleventh International Symposium on Water-Rock Interaction, Saratoga Springs, NY (US), 06/27/2004--07/02/2004

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  • Report No.: LBNL--54042
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 820275
  • Archival Resource Key: ark:/67531/metadc734393

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  • November 11, 2003

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  • Oct. 18, 2015, 6:40 p.m.

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  • April 4, 2016, 3:39 p.m.

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Lewicki, J. L.; Hilley, G. E. & Conner, C. The scaling relationship between self-potential and fluid flow on Masaya volcano, Nicaragua, article, November 11, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc734393/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.