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Apparent Resistivities of common ores and rocks


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Find below the Resistivities of common ores and rocks


Apparent Resistivities of common ores and rocks


ROCKS                                                                  APPARENT RESISTIVITY(ΩM)

Topsoil                                                                  50 – 100

Sand (loose)                                                       500 – 5000

Gravel                                                                   100 – 600

Clay                                                                        1 – 100

Weathered bedrock                                               100 – 1000

Sandstone                                                          200 – 8000

Limestone                                                           500 – 10000

Greenstone                                                       500 -200000

Gabbro                                                                 100 – 500000

Granite                                                                 200 – 100000

Basalt                                                                    200 – 100000

Graphitic schist                                                 10 – 500

Slates                                                                    500 – 500000

Quartzite                                                             500 – 800000


ORES

Pyrites                                                                  0.01 – 100

Pyrrhotite                                                           0.001 -  0.01
                                                                       
Chalcopyrite                                                       0.005 - 0.1

Galena                                                                  0.001 – 100

Sphalerite                                                           1000 – 1000000

Magnetite                                                           0.01 – 1000

Cassiterite                                                           0.001 – 10000

Hematite                                                             0.01 – 1000000


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