Our Story
The Plomosas Silver Project
Since going public in March 2018, GR Silver Mining has assembled an extraordinary portfolio of highly prospective mining concessions in the historic Rosario Mining District, Sinaloa, Mexico. At the core of this portfolio is the 78 km2 Plomosas Silver Project, which includes the former producing Plomosas polymetallic mine. The Company also controls 270 km2 of key non-core concessions adjacent to the Plomosas Project that are well situated providing incremental growth potential and possible future business opportunities. Combined, GR Silver Mining’s concessions control most of the silver-gold-lead-zinc mineralized zones identified in the eastern Rosario Mining District.
GR Silver Mining considers the Plomosas Mine Area and the San Marcial Area, located 5 km to the southeast, to be the focus of the Plomosas Project. The Company holds all exploration licenses and permits required for exploration on both areas and the necessary permits for exploitation at the Plomosas Mine Area. The proximity of the two areas makes synergies possible for exploration, drilling, resource expansion, and future development.
The geological setting of both areas, located along the western edge of the Sierra Madre Occidental, is particularly prospective. Recent exploration programs completed by GR Silver Mining have identified a geological setting similar to the San Dimas Mining District, which has produced 600 million ounces of silver and 11 million ounces of gold. In addition to GR Silver Mining drilling, our Plomosas Project database includes historical drilling completed by First Majestic Inc. and Grupo Mexico S.A. de C.V. The combined infrastructure and data between these areas offer the opportunity for integration of exploration and future resource definition in a series of drilled targets. Our exploration team has over ten years of experience in the Rosario Mining District with a record of successful discoveries. Our exploration portfolio covers some of the most prospective areas in the Rosario Mining District, and most recent geological studies are revealing highly prospective areas to potentially define large silver deposits.
San Marcial Area
San Marcial is a 100%-owned, near-surface, high-grade silver deposit and is the main focus of the
Company’s resource expansion activities.
GR Silver Mining recently expanded its NI 43-101 resource estimate at the San Marcial Area (2023), which now contains 52 million ounces silver equivalent including 46 million ounces silver (Indicated) and 16 million ounces silver equivalent including 14 million ounces silver (Inferred). The application of modern exploration techniques and the Company’s geological model resulted in a new high-grade silver discovery in the southeast extension from the initial resource area. The SE Area discovery is characterized by hydrothermal breccia-style mineralization, which is associated with a flexure in the target contact that is affected by a pair of northeast–southwest trending faults. GR Silver Mining is currently carrying out additional surface drilling to the southeast of the SE Area discovery aiming to continue resource expansion.
Plomosas Mine Area
GR Silver Mining owns 100% of the Plomosas Mine Area located near the historic mining village of La Rastra, within the Rosario Mining District. The silver and gold mineralization display the alteration, textures, mineralogy, and deposit geometry characteristics of a low sulphidation epithermal silver-gold-base metal vein/breccia mineralized system. Previous exploration focused on shallow lead-zinc-silver-gold polymetallic mineralization, hosted in northwest southeast trending structures in the vicinity of the Plomosas mine, which was previously operated by Grupo Mexico S.A. de C.V. from 1985-2001. Mineralization associated with east-west structures, however, remains under-explored. Plomosas and San Marcial collectively represent a geological setting resembling the multimillion-ounce San Dimas Mining District, which has historically produced over 600 million ounces silver and 11 million ounces gold over period of more than 100 years.
The combined Plomosas Mine and San Juan – La Colorada Areas feature an updated NI 43-101 resource estimate (2023) containing 32 million ounces silver equivalent including 8.8 million ounces silver (Indicated) and 33 million ounces silver equivalent including 8.5 million ounces silver (Inferred).
Management
Mr. Zaunscherb is a Canadian geologist with over thirty-two years, and six cycles, of experience as a mining analyst.
Marcio Fonseca
President & COO
Extensive experience in many jurisdictions through all phases of mineral assets development and operation.
Chartered Professional Accountant, CPA, with extensive experience supplying financial reporting and advisory services to multiple companies in the natural resource, technology, and retail sectors.
Blaine Bailey
Corporate Secretary
Chartered Professional Accountant, CGA working with public and private companies listed on the TSX, TSXV and NYSE over the past 20 years.
Board of Directors
Eric Zaunscherb
Chairman
Mr. Zaunscherb is a Canadian geologist with over thirty-two years, and six cycles, of experience as a mining analyst.
Marcio Fonseca
Director
Extensive experience in many jurisdictions through all phases of mineral assets development and operation.
Trevor Woolfe
Director
Extensive experience in exploration, project development and the evaluation of new opportunities.
Larry Taddei
Director
Larry Taddei brings sixteen years of experience as a senior executive in the mineral resource industry, culminating in twelve years as the Chief Financial Officer of MAG Silver Corp.
Brent McFarlane
Director
Mr. McFarlane is a mining engineer with over 35 years of experience in operations, development, and construction.
Jessica Van Den Akker
Director
Ms. Van Den Akker is a Chartered Professional Accountant (CA) with 20 years of experience in the resource sector and venture capital markets.
Advisory Board
Derek White
Advisor
President & CEO of Ascot Resources Ltd. with over 30 years of experience in the mining and metals industry.