Zacatecas Silver (ZAC.V) on Thursday said it completed its initial rock-chip sampling program at the Oso Negro project, located in Sonora, Mexico.
The company in a statement said the program was completed in March 2026 over the course of five days and samples have been dispatched to ALS for analysis with an expected turn around of four to six weeks.
It added 156 rock-chip grab samples were taken from three out-cropping low sulphidation veins with cumulative strike length of over 2 kilometres. Veins are up to 3m wide, multiphase with common veins breccias and pervasive iron oxides after sulphides. It also said that the quartz and vein textures are typical of the uppermost levels of a low sulphidation system, indicating that if present, the boiling and thus precious metal mineralization will be preserved below.
Zacatecas said the rock chip sampling has demonstrated a "robust" low sulphidation vein system, characterized by over two strike kilometers of multiphase, brecciated, iron-oxide stained and infilled, upper level veins.
"This initial mapping and sampling program is the first step in systematically advancing the portfolio, starting with our highest-conviction target," said Zacatecas Silver Chief Executive Eric Vanderleeuw. "As we integrate results, we expect to rapidly define drill targets at Oso Negro while continuing to unlock value across the broader portfolio."
Shares of the company closed down 6.3% at $0.075 on Wednesday on the TSX Venture Exchange.