Back to ANTALITH
During preliminary analysis of the data, it has been observed that energy from the
detonating cord had poor penetration although the resolution was good for very shallow
structure.
The buried charges had better penetration and the snow-streamer was sensitive enough to
record reflections from within the ice. The origin of these reflections is not clearly
understood and can be attributed to either embedded moraines or to changes in the ice
fabric. However, the shallow and middle crust are quite non-reflective in this area and
very few reflections were recorded from these depths.
In the wide-angle data generated by the 50-100 kg. granulated ANFO explosives, a deep
reflection clearly appears ( figure 3.) proving that the penetration of seismic energy was
good enough but it is the crust that is largely non-reflective.
