GSSI SIR 30, Manual

Page: 121 / 150

Geophysical Survey Systems, Inc. SIR® 30
Manual
MN 93-101 Rev E 115
Appendix D: Dielectric Values of Common
Materials
Material Dielectric Velocity
(mm/ns)
Air 1 300
Water (fresh) 81 33
Water (sea) 81 33
Polar snow 1.4 – 3 194 - 252
Polar ice 3 - 3.15 168
Temperate ice 3.2 167
Pure ice 3.2 167
Freshwater
lake ice
4 150
Sea ice 2.5 – 8 78 – 157
Permafrost 1 – 8 106 – 300
Coastal sand
(dry)
10 95
Sand (dry) 3 – 6 120 - 170
Sand (wet) 25 – 30 55 – 60
Silt (wet) 10 95
Clay (wet) 8 – 15 86 – 110
Clay soil (dry) 3 173
Marsh 12 86
Agricultural
land
15 77
Pastoral land 13 83
“Average soil” 16 75
Granite 5 – 8 106 – 120
Limestone 7 – 9 100 – 113
Dolomite 6.8 – 8 106 – 115
Basalt (wet) 8 106
Shale (wet) 7 113
Sandstone
(wet)
6 112
Coal 4 – 5 134 – 150
Quartz 4.3 145
Concrete 5 – 8 55 – 120
Asphalt 3 – 5 134 – 173
PVC 3 173
**Meter to English conversion factor: 2.54 cm
in 1 inch.
** Table of Dielectric values adapted from:
Reynolds, John M.
1997 An Introduction to Applied and
Environmental Geophysics, John Wiley &
Sones, New York.