Geology Reference
In-Depth Information
Table 1.2 Important physical properties of common rocks and ore minerals
Density
Susceptibility
Resistivity
Conductivity
Mg m 3
SI × 10 6
mS m 1
Material
Ohm-m
Air
0
0
8
0
Ice
0.9
9
100 000-8
0-0.01
Fresh water
1
0
1 000 000
0.001
Seawater
1.03
0
0.2
5000
Topsoil
1.2-1.8
0.1-10
50-100
10-20
Coal
1.2-1.5
0-1000
500-2000
2-0.5
Dry sand
1.4-1.65
30-1000
1000-5000
1-0.02
Wet sand
1.95-2.05
30-1000
500-5000
0.2-2
Gravel
1.5-1.8
20-5000
100-1000
1-10
Clay
1.5-2.2
10-500
1-100
10-1000
Weathered
bedrock
1.8-2.2
10-10 000
100-1000
1-10
Salt
2.1-2.4
10
10-10 000 000
0.01-1
Shale
2.1-2.7
0-500
10-1000
1-100
Siltstone
2.1-2.6
10-1000
10-10 000
0.1-100
Sandstone
2.15-2.65
20-3000
200-8000
0.125-5
Chalk
1.9-2.1
0-1000
50-200
5-20
Limestone
2.6-2.7
10-1000
500-10 000
0.1-2
Slate
2.6-2.8
0-2000
500-500 000
0.002-2
Graphitic
schist
2.5-2.7
10-1000
10-500
2-100
Quartzite
2.6-2.7
15
500-800 000
0.00125-2
Gneiss
2.6-2.9
0-3000
100-1 000 000
0.001-10
Greenstone
2.7-3.1
500-10 000
500-200 000
0.005-2
Serpentinite
2.5-2.6
2000-100 000
10-10 000
0.1-100
Granulite
2.7-2.9
100-5000
500-1 000 000
0.001-2
Granite
2.5-2.7
20-5000
200-1 000 000
0.001-5
Rhyolite
2.5-2.7
100-5000
1000-1 000 000
0.001-1
Basalt
2.7-3.1
500-100 000
200-100 000
0.01-5
Dolerite
2.8-3.1
500-100 000
100-100 000
0.01-10
Gabbro
2.7-3.3
100-10 000
1000-1 000 000
0.001-1
Peridotite
3.1-3.4
10-10 000
100-100 000
0.01-10
Pyrite
4.9-5.0
100-5000
0.01-100
10-1 000 000
Pyrrhotite
4.4-4.7
1000-50 000
0.001-0.01
1 000 000-
10 000 000
Sphalerite
3.8-4.2
10-100
1000-1 000 000
0.001-1
Galena
7.3-7.7
10-500
0.001-100
10-10 000 000
Chalcopyrite
4.1-4.3
100-5000
0.005-0.1
10 000-200 000
Chromite
4.5-4.7
750-50 000
0.1-1000
1-10 000
Hematite
5.0-5.1
100-1000
0.01-1 000 000
0.001-100 000
Magnetite
5.1-5.3
10 000-
10 000 000
0.01-1000
0.001-1
Cassiterite
7.0-7.2
10-500
0.001-10 000
0.1-10 000 000
 
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