Very good question. It is difficult to trace the dry fracture zones through electrical resistivity survey. It is something like trying to trace resistive zone within an infinitely resistive body (hard crystalline rock).
I recommend the previous answer but it is possible to detect the fractures into the host rock by using the resistivity method when there is difficult in current penetration greater than the unfractured rocks with taking into account the differentiation between both are need to high experience.
Dear Cyril Afuwai
I know a person who can give you great help at this level. His name is Rui Miguel Marques Moura, and he is a Professor at the University of Porto (Portugal) and is also registered in researchgate.
Greetings
Mr. Ammar, you have recommended my answer but ultimately disagreed to the same. Unfortunately I didn't understand your answer. The question I assume is not fractured rock verses compact rock, but how to trace dry fractures (filled with air or vacuum) within a hard rock at unknown depths.
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