Thanks Alexei ii. All of the mineralisation described in Para 2...

Thanks Alexei ii. All of the mineralisation described in Para 2 of your extract would be visually extremely apparent in drill core. And this of course was the hoped for best-case scenario in this first Tetris hole, which tested the centre of the geophysical anomaly.

And what we actually drilled at Tetris that matched the above Havieron description (from the visual description of the Tetris core) is:

1. Identical host rocks (meta-pelites = meta-siltstones, meta-psammites = meta-sandstones, and meta-carbonates = meta-carbonates)
2. Abundant hydrothermal alteration
3. Thick quartz veining
4. Minor brecciation
5. Pyrite and Pyrrhotite

What we lack so fare are the massive to semi-massive and breccia-cementing sulphides with visually significant amounts of chalcopyrite, and also any mafic igneous intrusive rocks.

HOWEVER, a crucial point in the story so far at Tetris is that:

1. The main economic sulphide body at Havieron is, for whatever reason, an ANNULAR cylindrical body, meaning that

2. in plan view, Havieron is a donut-shaped body of high-grade sulphide mineralisation, with a low-grade, poorly mineralised centre.


And if you look at the Tetris drill hole, you will see that it has only drilled a 150m horizontal section at the centre of the geophysical anomaly (which is 1.2km across). And if this was Havieron, this hole would have intersected only the low-grade hole in the middle of the donut / core of the cylinder. It would have missed the high-grade breccia sulphide-mineralised annular rim around that hole, which is the actual main orebody.

So what we may therefore have drilled in this first hole at Tetris is just a similar low grade, poorly-mineralised centre.

Any potentially comparable annular, outer, high-grade, sulphide breccia zone that is present at Tetris (purple and pink in the Havieron plan view below) is yet to be tested by the Tetris drilling.

(Which when you come to think of it, is probably exactly how Newcrest originally tested Havieron with the first hole that they put into that! Hence the fact that they too missed the annular high grade sulphide body around the poorly mineralised core. It is the obvious way to test an anomaly like this if you only have budget for one deep hole. But no-one could have guessed at the time that the mint had a hole in it!)

See below..

Tetris:



Havieron:



So there is clearly more drilling required at Tetris, to test that outer rim, regardless of any assay results that we get from this first short hole into the central zone.