Geology Reference
In-Depth Information
Figure 1.10
Geophysical profiles across a pyrrhotite-bearing sulphide
mass. The amplitude of the gravity anomaly (a) might be a few tenths of
a milliGal, and of the magnetic anomaly (b) a few hundred nanotesla (nT).
The electromagnetic anomalies are for a two-coil co-planar system (c) and
a dip-angle system (d). Neither of these is likely to have an amplitude of
more than about 20%.
