DC Resistivity Survey (Mise-A-La-Masse)
Exploration Technique: DC Resistivity Survey (Mise-A-La-Masse)
|Exploration Technique Information|
|Exploration Group:||Geophysical Techniques|
|Exploration Sub Group:||Electrical Techniques|
|Parent Exploration Technique:||Electrical Profiling Configurations|
|Information Provided by Technique|
|Lithology:||Rock composition, mineral and clay content|
|Stratigraphic/Structural:||Detection of permeable pathways, fracture zones, faults|
|Hydrological:||Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water|
|Thermal:||Resistivity influenced by temperature|
The Mise-Á-La-Masse method is normally used for mapping ore deposits with high electrical conductivities such as sulfide bodies. For geothermal exploration the Mise-Á-La-Masse technique can be used to help define the ground fluids that flow into a well. It can also be useful for mapping faults and fractures in a geothermal system and ultimately helps in defining the boundaries of a reservoir. 
This method is a DC resistivity technique in which the charged current electrode (C1) is connected to a conductive structure that goes deep into the surface. The return current electrode (C2) is placed far from the survey area, essentially at infinity. Traditionally this method is used in sulfide ore mining and the positive electrode (C1) is connected to an outcrop of the ore body or an existing borehole within the ore body.  In geothermal exploration this method is usually performed by connecting the positive electrode (C1) directly to the casing of an existing well. When a voltage is applied potentials develop which can be measured on the surface and mapped. Electrical potentials are measured using the potential electrode (P1); moving it at incremental distances and radially around the borehole. The fixed potential electrode (P2) is normally placed far from positive current electrode (C1) and usually opposite of the negative current electrode (C2).  The shape and size of localized conductive deposits is reflected by the pattern of electrical potentials measured on the surface. 
- (Kauahikaua et al., 1980) "Mise-Á-La-Masse mapping of the HGP-A Geothermal Reservoir, Hawaii"
- (Kearey et al., 2002) "An introduction to geophysical exploration"
- Mustopa et al., 2011, "Resistivity Imaging of Mataloko Geothermal Field By Mise-Á-La-Masse Method"
|Page||Area||Activity Start Date||Activity End Date||Reference Material|
|DC Resistivity Survey (Mise-A-La-Masse) At Roosevelt Hot Springs Geothermal Area (Ward, Et Al., 1978)||Roosevelt Hot Springs Geothermal Area||1978||1978||
|Mise-A-La-Masse At Kilauea East Rift Geothermal Area (Kauahikaua, Et Al., 1980)||Kilauea East Rift Geothermal Area||1980||1980|