Xtract Resources - XTR Bushranger IP anomaly release.

 

It's important to start with this picture. I am sorry for the rough nature of this post, It's literally been typed in about 15 mins.

For simplicity, in Blue we have a fault line (probably subduction). Its dipping pretty much east-west (going down at a 45 degree angle as you move west)

The yellow area is the area of possible mineralisation.

The brown area the area of more likely mineralisation - maybe heavier.

The most important thing about this map - imo, is the fault. This would have been evident within a week or two of the IP survey and was not evident prior.

Secondly we have the extent of the IP - mineralisation zone.

Thirdly we have the slightly unusual fact that the mineralisation seems to follow the IP anomaly completely. This includes the small open pit to the east of the JORC. - not common place for porphyry.

Conclusions:

The IP anomaly is far to big and doesn't in anyway resemble the finger porphyry intrusion anomalies of Boda or Northparkes.

The fault line is also a clear signal, as the IP anomaly shows the potential mineralisation dipping as the fault dips.

It's a give away that we are looking at a skarn/dyke deposit, with associated finger intrusion porphyries, providing the higher .4-.5 CU values.

It's no wonder that XTR are looking at open pit as this plays perfectly into open territory.

The IP mapping seems to push Bushranger from Boda/Northparkes to Winu/Copper version of Cadia.

The new geological understanding of finger intrusions within a dyke/skarn system would explain perfectly the large extent of the outer alteration zone, in comparison with the smaller size of the intrusion body.

Put simply, as the east side of the subduction zone travelled south, it would have pushed fluids up through smaller fracture zones, creating the tilt we see in the initial JORC finger intrusion. smaller fracture zones cooled more quickly providing the illusion of gold rich mineralised. The heavier mineralisation would have re-treated down, to the larger fractures closer to the intrusion, and possibly closer to the fault zone?...the slower cooling allowed for more copper rich formation.

A final word IF the assays come back with .1 to .3 cu within the outer alteration zone i.e the anomalies shown indicating the skarn/dyke mineralisation, then this is potentially at least as large as Rio's Winu..