Green Monster Property: A Legacy with Modern Potential
The Green Monster Property is located at the western edge of the Goodsprings Mining District, an area that has been a center for base metal production since the late 1800s. This historically rich district, known for its production of zinc, nickel, and copper, is undergoing a renaissance as modern exploration techniques open new possibilities.
The Green Monster Property represents an exciting opportunity to leverage historical data, innovative exploration techniques, and strategic planning to develop a project of significant economic and strategic importance.
Since its founding, Glenstar has prioritized sustainable exploration practices, integrating modern technology and science-driven methods. The company continues to advance its flagship project, the Green Monster Property, with a vision to meet the growing global demand for critical minerals.
Project Summary
Glenstar’s property, the “Green Monster” is a Co-Ni-Cu-U mineral property that is centered on a high grade, poly metallic mineralized property located 40 miles southwest of Las Vegas, Nevada.
The Green Monster Property—spanning roughly 700 acres across 35 federal lode claims—is part of a highly prospective, approximately 30‑kilometre-long fault zone already noted for zinc-rich mineralization and anomalous nickel, cobalt, and copper occurrences. Prior surface sampling from 2022 had highlighted strong nickel‑copper‑cobalt‑zinc signatures, and the new drill results reinforce these findings while repositioning the project as a polymetallic target rather than a zinc‑dominant play.
The property lode claims are attached to patented mining claims covering the underground, historic workings of the Green Monster Mine. Patented Claims were historically only given to properties that had significant production. The Green Monster Mine produced > 2 million pounds of zinc along with lesser quantities of copper, silver, lead, and uranium. These productive workings date to the late 1800’s to the early 1900’s. Uranium production occurred in the 1940’s. No modern geological exploration or drilling has been carried out on the property.
A chip sample across the wall of historic workings on the property returned 1.18 meters of 3.77% Copper, 3.06% Nickel, 0.21% Cobalt and 6.83% Zinc. Uranium is also present with values to 400 to 500 ppm along with some rare earth elements.
These values represent in-place, vein style mineralization of the sheared contact between a dolomite footwall and a black limestone hanging wall. The limestone hanging wall is strongly fractured with healed multi-directional fracture arrays.
Project Highlights
- Strategic Location: Situated approximately 40 miles southwest of Las Vegas, the Green Monster Property is easily accessible via well-maintained roads. The area is supported by a strong infrastructure network, including industrial-grade and high-voltage power lines, and benefits from proximity to Pahrump, Nevada, for logistical and workforce needs.
- Rich Geology: Comprising 35 unpatented lode mining claims over approximately 600 acres, the property contains promising zones of nickel, cobalt, and copper mineralization. Initial sampling results have shown high grades of these critical minerals, indicating significant exploration potential. Channel sampling has returned 3.77% copper, 3.06% nickel, 6.83% zinc, 0.21% cobalt along with anomalous uranium, lead and silver.
- Proven Historical Value: Historic workings, including shafts and raises, confirm past mining activity on the property. This, combined with Glenstar’s modern geophysical surveys and soil sampling, highlights the potential for new discoveries in underexplored areas.
- Exploration Program: Our exploration program includes state-of-the-art airborne magnetic surveys, resistivity studies, and planned drilling campaigns to evaluate deeper subsurface targets. A discrete magnetic high detected near the Desert Valley prospect suggests the presence of nickel sulfide mineralization at depth.
Future Exploration
With drilling currently underway, Glenstar is planning on future exploration in 2025 with a goal of expanding on previous exploration results, undergoing a drilling campaign with a target 5 new drill holes, for a total of 500 meters.
Current Metals Target:
- Cobalt
- Nickel
- Zinc
- Copper
- Uranium
- Rare Earth Elements
Latest Discovery (August 2025)
In August 2025, Glenstar Minerals announced a remarkable discovery from drill hole GMST-4 at the Green Monster Project. Located approximately 150 m from the Phase 1 target, the hole intersected a ~10 m-wide polymetallic zone containing over 30 % zinc, up to 177 ppm silver (≈ 161.5 g/t or 5.7 oz/t), 523 ppm nickel, 91.9 ppm cobalt, and > 0.36 % copper at depths between ~131–142 m within the hanging wall of the Green Monster Fault Zone. These exceptional grades and unexpected depth results have shifted the project’s focus toward an expanded Phase 2 drilling campaign along strike and at depth.
The Green Monster property spans ~700 acres across 35 federal lode claims and is situated within a ~30-km-long fault zone already known for zinc-rich mineralization and anomalous nickel, cobalt, and copper. Previous surface sampling in 2022 hinted at significant critical-metal potential; the new drill results not only reinforce those findings but fundamentally reframe the project as a polymetallic target. This positions Green Monster for strategic advancement with renewed emphasis on multiple high-value metals.