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Stratagem EH 4 Survey at Xiao Tang Shan Hot Spring  Area, China The Xiao Tang Shan area of China is known to have geothermal activity concentrated along faults.  A Stratagem survey was done to verify the location of a know fault with geothermal activity.

The survey consisted of forty (40) stations with 15-meter  dipole spacing, for a total survey line length of 600 meters.  The data were then processed using Stratagem's 1D and 2D inversion software.  The resulting X,Y,Z file created by Stratagem's EMAP 2D Processing was contoured using Geosoft™ mapping software and output to a color printer. The fault is interpreted to be the more conductive zone, seen in this presentation as the red area.  This increased conductivity is probably the result of weathering associated with geothermal activity.  Note the apparent dip of the fault is clearly seen in the cross-section.  Also note the offset in similarly resistive structures across the fault, indicating a vertical displacement along the fault.