Drill Results
Glenstar to Conduct Shear-Wave Seismic Survey at Green Monster Project Following Successful Phase 2 Drill Program
Early-stage polymetallic explorer advancing Green Monster and Wildhorse projects in Nevada amid lower-than-expected assay grades.

Executive Summary
- Glenstar Minerals announces a Terren shear-wave seismic survey at its Green Monster Project in Nevada, commencing June 29, 2026.
- The survey will deploy four velocity cross sections along 2,400 ft arrays to image bedrock depth, faults, voids, and alteration zones down to 600 ft.
- The geophysical work follows Phase 2 drilling (6 holes, ~3,320 ft) which confirmed polymetallic mineralization but returned grades lower than anticipated.
- Management cites significant geological complexity and highly fractured rock as the primary drivers for needing advanced imaging to guide future exploration.
- Next steps involve tying survey interpretation to existing subsurface data to determine the scope and direction of the next drilling phase.
Material Impact
- The announcement represents a standard technical follow-up to Phase 2 drilling results. It does not introduce new financial metrics, resource estimates, or operational milestones.
- The survey is a logical de-risking step given the lower-than-expected grades and complex geology encountered in Phase 2. It extends the exploration timeline rather than accelerating it.
- No immediate impact on cash flow or capital requirements is disclosed, though the survey itself represents incremental exploration spend.
- The market likely already priced in the necessity of further geophysics following the April 2026 update on disappointing Phase 2 grades.
GSTR · Price
Company Overview
- Glenstar Minerals is a junior exploration company focused on two primary assets in Nevada: the Green Monster Project (Clark County) and the Wildhorse Project (Mineral County).
- Green Monster: Targets polymetallic mineralization (Zn, Ag, Cu, Ni, Co, Ga). Phase 1 and Phase 2 drilling have confirmed high-grade zones but highlighted significant geological complexity.
- Wildhorse: Targets a copper-gold porphyry/skarn system. Trenching and RC drilling have identified anomalous copper, silver, bismuth, and tungsten, with historical workings dating to the late 1800s.
- The company is in the early exploration stage, relying on surface sampling, trenching, and reverse circulation drilling to define targets. No resource estimates or production plans have been announced.
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Jun 17, 2026 · 08:30