When not directly associated with Lulo Kimberlite exploration...

When not directly associated with Lulo Kimberlite exploration here is a document which may help clear a few things up regarding general Kimberlite exploration.

https://www.911metallurgist.com/blo...kimberlite-exploration-in-northern-Canada.pdf

Here is an excerpt from the document

"In some fields (eg. Parry Peninsula area and Victoria Island) kimberlite pipes are associated with dipolar or strongly negative anomalies reflecting remnant magnetism as shown in Figure 3(e) (amplitude –800 nT) and Figure 3(f) (amplitude –300 nT). Unfortunately a large variety of features can produce magnetic anomalies similar to those of kimberlite pipes. Magnetic field lows similar to those generated by some crater facies kimberlite targets are created by deep bedrock topographic depressions filled with non-susceptible glaciofluvial sediments."


So in other words, kimberlites can show up as both having higher than background magnetic readings (a,b) or inversely, lower than background magnetic readings (c,d,e).


I hope this information i'm portraying is correct. Please correct me if i'm wrong.