Conclusions: Observations
- The mantle of the Slave is very laterally heterogeneous in electrical conductivity
- Southern Slave is consistent with a deep asthenospheric boundary (200+ km)
- Beneath the Lac de Gras region the mantle is anomalously conductive, with a region of ណ ohm.m at a depth of 80-110 km
- This anomalous region correlates spatially with an anomalous ultradepleted harzburgite layer