Ann: Gov NDIBK04 Data Confirms IOCG/ISCG Model for Mt Lamb, page-140

Following @aubin great post about the Urquart shale, I did some research on exploration for SEDEX deposits.

All Australian SEDEX deposits are characterized by strongly elevated Thallium and this is one of the key pathfinder elements that screams SEDEX. At Mt Isa, the Thallium anomaly extends into the hanging wall and foot wall for about 150m from the ore and the Thallium anomaly extends for kilometers along strike along the structure that hosts the ore. The Mt Isa Thallium anomaly is in the order of 50ppm in the ore, grading down to 0.5ppm background at distance from the deposit.

Here is a plot of Thallium in NDIBK04. It is only modestly anomalous but is clearly increasing down hole. If there is a SEDEX deposit there, then NDIBK04 was getting closer to it, but perhaps running almost parallel to it and still at least 100m or more away.