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Thursday, June 15, 2017

Tinka, Tailor, Soldier......Zinc!

Some new results from Tinka, so here is an update!

Summary:

  • Hole A17-063 continued to give some excellent results. The lower zinc zone has been extended by >200m.
  • However, drilling away from the core zone just hit narrow, albeit high-grade zones and veins
  • Good potential to expand resources to the NW of holes 061 and 063 - Tinka are drilling holes 69, 70, 71 and 72 into this area and theses are holes to look out for as they could bring the size of the South Ayawilca deposit to >12Mt @ >7% Zn

I've also updated the Officially Bad (TM) resource table

A nice bump up in resources
I've also built up the Leapfrog Model (you can have a look at the 3D views - link), and included the faults from the plan map on the Tinka Website. I want to see how mineralization is related to the faults.

It sits nicely in the middle
We can see that the best mineralization is found between the 2 green faults. I've drawn a think black line to show what I think is the spine (i.e. the thickest part) of the mineralization.

It would be nice to see some holes to the SW (right) of hole A17-064
When we look at the section, we can see that hole A17-063 hit a high-grade, but relatively deep zinc zone, and the shallow zones hit by holes A17-056 and 061 don't continue to hole 063.

Why? Did they hit a vertical (chimney) zone of zinc mineralization, or is this upper zone hosted in a small, laterally discontinuous unit of favorable host rocks?

Left = horizontal mineralization; right = vertical chimney around hole A17-056
Tinka have been kind and included a map showing where the additional holes have been drilled, but the assay results haven't been released (it does take time to get the samples from the Andes down to Lima for analysis).


Saturday, June 10, 2017

Camino - Road to Chala

Tired if working the traveling sideshow circuit investment show circuit in Canada, the Camino Dream team, got tangled up with raising 5 million loonies, but have triumphantly returned with some core, from driest, sandiest Peru.

so beautiful...

Summary.

Negatives
  • Poor correlation between diamond hole and earlier high-grade RC hole
  • Presence of Acid Soluble copper throughout the hole - could this lead to metallurgical complexities?
Positive
  • DCH-001 intersected a third, deeper zone(s) of Cu mineralization (27m @ 1.63% Cu)
I was disappointed that there was such a discrepancy between holes CHR-002 and DCH-001.
  • Original Hole - CHR-002 = 106m @ 1.3% Cu
    • inc. 38m @ 2.12% Cu
  • Twin Diamond hole - DCH-001 = 168.5m @ 0.72% Cu
    • including a couple of ~10m zones grading >1% Cu
We can see that visually:

those holes are only 10-15m apart - much less red stuff in hole DCH-001!

So, we have 2 holes, drilled right next to one another that have returned significantly different results. I'm ignoring the PR intervals and looking at the individual samples (the colored bars) and you can see that there are significant differences between the holes. Are we seeing sample bias caused by the RC drilling? It may have:
  • Washed away of fines and lighter material (i.e. the gangue)
  • Caused dilution and mixing of grade across zones, particularly at the water table
Or, do we have a very heterogeneous zone of mineralization, with significant changes in grade over small distances?

My feeling is that the RC drilling has produced non-representative sample, and for me it will be interesting to see what is reported in the diamond holes.


Here are my annotated notes for this section, just to highlight some important areas.

Add caption
I'm also intrigued with the Magnetite rich zones. They have been interpreted as being horizontal, but the cool thing with Leapfrog, you can test a variety of ideas.

Are they horizontal?

cross section through Adriana


Are they vertical?

vertical dykes (grey)
We can see that there is a significant difference in the depth to the magnetite-rich unit between sections, and the vertical interpretation could be an reasonable alternative, I'm thinking that there could be a series of vertical post-mineral (i.e. after copper) dykes cutting through the project.

You can get the Leapfrog viewer file from here (link).


Just some feedback for Camino, could you get someone to review your PRs before you set them free?
loads of errors
You have some typos, using the wrong units and refer to gold assays in the blurb below the table - or is the AssCu number meant to be gold?