Feeder Zone Environment - a theorySomething down below or elsewhere at the upper level has supplied all of this widespread silver to the La Cigarra property. Finding the source would be a material development. The geophysical program could provide hints to the location of this structure (possibly a game changer, one found).
The La Cigarra environment could end up looking somewhat similar to the environment pictured on the model below. To date, there seems to be some similar characteristics at the upper levels at La Cigarra. I hope the model diagram comes through on this post. The will help to visualize the theory.
Here is the model:
This model shows widespread low-grade minerals at the very upper level, labeled as ``silicia replacement stockwork/ lithocap`` - bright yellow.
I don`t know what it`s called at La Cigarra, but something similar exists at La Cigarra. The widespread low-grade silver at La Cigarra, located outside of the main stockwork-vein (mineralized) areas, probably range 1 - 15 g/t Ag.
The model shows widespread stockwork-veins (quartz) - red ``X``.
Stockwork-vein (quartz also, I think) structures are the primary areas for mineralization at Cigarra.
The model shows one area with hydrothermal breccia at the upper level (darker yellow). I don`t think we have hydrothermal breccias at the upper level (thus far explored) at La Cigarra.
The model shows the meteoric water (blue arrow) going down.
The model shows the magmatic fluid / vapor upflow (black arrow) coming back up mineralized, after interacting with the minerals below.
The model visualizes a feeder zone at depth that is a hydrothermal breccia structure - purple (ish).
The model shows the meteoric water goind down, interacting with the deeper breccia (purple), becoming pregnant, then pushed back up by the boiling zone.
The model shows a domed intrusive located beside the deeper breccia zones.
In the model example, a porphyry supplies some of the minerals to the deep breccia. The porphyry could be located beside or above a magma pool.
The La Cigarra environment could look similar to this model at depth, but could also have different structures below. Our (La Cigarra) feeder zone may or may not be in the form of a breccia. Also, if we find intrusives below, those intrusives may or may not be mineralized. The model`s intrusive does not look mineralized, but intrusives can be mineralized (perhaps sometimes a very good source of mineralization).
We could also find a decent prophyry below.
We could also find narrow high-grade veins below (maybe somewhat similar to Santa Barbara and San Francisco, and maybe Veta Colorada.
Nothing is really set in stone. But, the environment profiled in the model feels somewhat similar to what we are seeing at the upper levels at La Cigarra.
The geophysical study may provide hints about possible structures at depth, and help us to better target our drilling.