Hello David, Overall, the AMT inversion does give the general kimberlite signature with some complications from varying properties of individual kimberlite units. I was impressed with the subdivision of the overburden into the upper resistive layer, underlain by a conductive layer and bottomed by a resistive layer (but less so than the upper layer). These appear to correlate well with what we have defined as the upper glacial sand, the glacial clay and the glacial till. This works very well for the 122 survey. For the Orion South (140/141) data we often break the upper units into a sand, clay, silt, and clay. The silt may be clay-rich effectively making it one conductive layer with the clays above and below. Orion South I looked in detail at Section 3 on Orion South (attached). You noted that there are resistive blocks within the conductive shale and represent thick kimberlite deposits. The possible vent for what we term the Pense (near 141-13) does not appear to define a good resistivity profile. Perhaps the Pense kimberlite is more conductive than the EJF and doesn't create a strong contrast with the shale (it is very different magnetically as well). The EJF vent to the south east (near station -400m) is well defined on the section. A similar signature is observed near +300 (as you noted) and coincides with a thick EJF accumulation and speculated secondary EJF vent in the area. In addition, there is also a probable VPK vent in the area (near ~+450). With regard to the interpreted vent near -800 there is no obvious vent based on drilling on the section but there is a VPK (the 133 body) vent within about 150m. One thing of interest is the conductive layer between -100 and +200. There are very thick deposits of kimberlite in the area. However, the relative conductive layer may be the result of thick LJF deposits which may have more conductive properties due to shale clast incorporation??. You also noted a possible vent near +1500. This is getting close to the Orion Centre (anomally 145) feeder vent. Body 122 In terms of further data I have included a spreadsheet for the 122 body. This includes a header file, geological picks and a legend. You can have a look at how the kimberlite matches the section. Regards, shawn