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Monday, May 15, 2017

Tinka - Ayawilca

We have seen some decent hits from Tinka's Ayawilca project in Peru.


  • 62.4m @ 5.6% Zn, inc. 17.9m @ 11.6% Zn (link)
  • 51.9m @ 10.1% Zn, 62 g/t Ag (link)
  • 18.6m @ 10.4% Zn and 52 g/t Ag (link)


Summary


  • Drilling has hit multiple high-grade zinc (with Ag credits) lenses over a ~200m length
    • officially bad tonnage guesstimate = 8Mt @ 4.7% Zn
    • including a 2.3Mt core grading 7.2% Zn
  • Early days, mineralization open to the north and south
  • Faulting may have a significant impact on size of the deposit.


I've brought the data into Leapfrog Geo (you can get the 3D viewer file from here (link), back calculated the residual grades to see how everything looks.

Zinc

Multiple lenses
Silver

Silver is essentially in the same place as zinc
Lead

Lead is restricted to a few, narrow zones.

We see a number of zinc lenses, that appear to pinch-out to the NW and SE. What will be critical is what the faults (dashed black lines) do to the mineralization, are they:

  • Pre-mineralization – minimal effect, but could have some high-grade Zn (+Ag) mineralization up them
  • Post – offset the mineralization – i.e. the mineralization could be deeper or shallower
I was intrigued by the zonation (?) in different metals:

  • Zinc appears to be relatively consistent, forming continuous >5% zones between the drill-holes, but there does appear to be higher grades in the Northwest.
  • Silver - there are higher grade silver zones, several appear to be close to the northwest (left) fault, and there is a nice high-grade zone at depth.
  • Lead - minimal lead, some high-ish grade intervals associated with the NW fault, but in general the Pb levels are very low.
It does appear that the NW fault could be an important controlling structure and may have some high-grade mineralization (a chimney) associated with it. It was a shame that hole A17-059 wasn't pushed on a bit further to test this fault at depth.

Hole 58 is interesting, does it show a continuation of this zinc zone to the NW or is it a separate zone or related zinc vein.chimney associated with the NW fault zone?

I did a quick and dirty 'resource' tallying


So that is a good start, so why don't we look at the upside


A Crap doodle - i'll be updating this

You can clearly see that the zinc zone is open to the NE and SW, and will offer good potential to define a good chunk of mineralization, as this zone is ~300m wide and so far drilling has focused (6 holes - 56A was an extension of 56, so i'm counting it as 1 hole), on a 100m section.

I'm also interesting to see what hole 59 will hit. I'm not very confident (maybe a couple of narrow zones) as mineralization is pinching out towards the NW fault, and my gut feel is that this fault is an important controlling structure, which either controlled the ore bearing fluids or has offset the mineralization.



8 comments:

  1. stupid question: Is there a trial version or free version of Leapfrog Geo that will permit me to view the 3D file?

    ReplyDelete
    Replies
    1. yes there is, you can download the free Leapfrog viewer program from here
      http://www.leapfrog3d.com/products/leapfrog-viewer/downloads-access

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    2. you can also download a 14 day full trial as well.

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  2. Hi,

    i was wondering if you looked at pulcayo zinc/silver project being developed by pcy http://www.prophecydev.com/projects/pulacayo-silver-lead-zinc/ looks similar to this

    interesting to know your thoughts

    ReplyDelete
    Replies
    1. I will do, they include a huge amount of information on their website, including the resource model. That makes my life a lot easier!

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    2. I've compiled the data, can you send me your e-mail address to theangrygeologist@gmail.com, so we can chat directly?

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  3. This comment has been removed by the author.

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  4. What do you think about that deep tin-bearing pyrite-pyrrhotite manto potential?

    ReplyDelete