PROJECTs • Exploration projects
Cumaro, Sonora
40.6 g/t
Au highest gold assay
253 g/t
Ag highest silver assay
~1,500 m
planned diamond drilling
4
targets
Overview
Cumaro is a 620 hectare property inset within Coeur Mining’s El Picacho district in Sonora, on strike from the El Picacho gold-silver development and about 38 kilometres north-northeast of Coeur’s Las Chispas silver-gold mine. It is a low sulphidation epithermal vein system with more than 10 kilometres of known veins and hosts extensions of the El Picacho, Dos Amigos and Basaitegui vein systems. The property is held under an option to acquire a 100% interest from Heliostar Metals.
Rock chip sampling results (October 27, 2026)
We collected 117 reconnaissance rock chip grab samples from outcropping veins, concentrated on about 1.5 kilometres of vein outcrop. That is a small part of the known vein length. Of the 117 samples, 39 assayed above 1 g/t gold, and 12 of those assayed above 5 g/t gold, with a high of 40.6 g/t. Thirty samples assayed above 1 oz/t silver (31.2 g/t), with a high of 253 g/t. The high-grade samples cover a contiguous strike length of 500 metres. Veins are up to 4 metres wide and multiphase, with common vein breccias and pervasive iron oxides after sulphides.
What the textures tell us
Vein textures and mineralogy indicate we are sampling the uppermost levels of the system, above the boiling zone. Many samples were partially oxidized and leached at surface. An untested eastern fault block is interpreted to preserve the boiling zone at shallow depth.
Targets and next steps
Four targets have been identified: the Dos Amigos extension and the Verde, Principal and Aguajito structures. We have commissioned high-resolution multispectral satellite imagery to guide follow-up rock chip and channel sampling. A drill permit application has been submitted to SEMARNAT for a program of about 1,500 metres. Land access agreements are in place.
Cautionary Note
Rock chip grab samples are selective by nature and are not necessarily representative of the mineralization on the property. Sampled widths are not true widths. El Picacho and Las Chispas are not owned or controlled by Zacatecas Silver Corp. and mineralization on nearby properties is not necessarily indicative of mineralization on the Company's property.
project
Company | Market Cap. | Project Name and Location | Resources and Reserves |
|---|---|---|---|
Rio Tinto | n/a
| Jadar, Serbia
| 85.4 Mt @ 1.76% LiO2 and 16.1% B2O3 (Ind.); 58.1 Mt @ 1.87% Li2O and 12.0% B2O3 (Inf.)¹. |
Ioneer Ltd. | AUD 510 million (12 month high of AUD 925 million)
| Rhyolite Ridge, CA
| 146.5 Mt @ 0.35 % LiO2 and 4.56 % B2O3 (M+I+I)².
|
5e Advanced Materials Inc. | AUD 214 million (12 month high of AUD 969 million) | Fort Cady, CA | 74.3 Mt @ 0.076 % LiO2 and 4.15% B2O3 (M+I); 96.9 Mt @ 0.069 % LiO2 and 4.75% B2O3 (Inf.)³. |
¹ Rio Tinto updates Ore Reserves and Mineral Resources at Jadar, Notice to ASX, 23 February 2022.
² IONEER USA Corp. Rhyolite Ridge Lithium-Boron Project Definitive Feasibility Study (DFS) Report (Li2CO3 and H3BO3 values converted to LiO2 and B2O3).
³ 5e Advanced Materials Inc., Form 8-K, May 11, 2023. Commission File Number 001-41279