Hycroft Mining Holding Corporation (Nasdaq: HYMC) reported new drill results on August 18, 2026 from its ongoing exploration program at the Hycroft Mine in Winnemucca, Nevada, highlighting continued high-grade silver mineralization at two zones the company calls Brimstone and Vortex. The strongest single result came from Vortex, where hole H26D-6088 returned 12.5 meters grading 375.41 grams per tonne silver, including a narrower 4.2-meter interval at 748.02 grams per tonne, an unusually high grade for a silver deposit. That hole also extended the Vortex high-grade zone roughly 150 meters further west than previously known.
What the Numbers Mean
Grams per tonne (g/t) measures how many grams of metal are contained in each tonne of rock; for silver, grades in the hundreds of g/t are considered high-grade, while typical mined silver deposits often run in the tens of g/t. At Brimstone, hole H26D-6169 returned 82.7 meters at 87.52 g/t silver and 0.77 g/t gold, including a higher-grade 19.4-meter section at 108.19 g/t silver and 2.10 g/t gold, results the company says confirm the high-grade system extends through one of its widest tested sections and moves it closer to the surface. Hycroft also reported the widest single test yet at Brimstone, hole H26D-6087, returning 147.8 meters at 32.34 g/t silver, including a narrower 4.4-meter interval at 546.83 g/t silver.
The company also converts results into “silver equivalent” and “gold equivalent” figures, a way of expressing a hole’s combined silver and gold content as a single number, using assumed prices of $3,600 per ounce for gold and $48 per ounce for silver. These are the company’s own stated price assumptions for that calculation, not necessarily the current market price of either metal, and readers should treat the equivalent-grade figures as illustrative rather than as a direct measure of value.
A Possible Feeder System
Below the main Brimstone zone, the company is following up on a 2025 geophysics survey that suggested a deeper “feeder” system, essentially, a channel through which mineral-rich fluids may have moved upward to form the shallower deposit. Two step-out holes drilled roughly 90 meters deeper than earlier tests returned rock alteration and a chemical signature the company says is consistent with that interpretation, along with one narrow high-grade interval, but Hycroft describes this target as still being tested rather than confirmed.
Program Status and Company Context
Hycroft has drilled approximately 15,585 meters of a planned roughly 26,000-meter core drilling program since starting in August 2025, with about 7,200 meters still planned at Brimstone and 3,000 meters at Vortex for the remainder of the program. CEO Diane Garrett said the company holds a debt-free balance sheet and that its operational focus this year is determining the best path forward for the mine. It’s worth noting Hycroft has not completed a feasibility study on Brimstone or Vortex, and the company’s own filings reference past cessation of mining operations at the broader Hycroft site; these are still early-stage exploration results being used to evaluate whether, and how, the zones might eventually be mined, rather than results from an active, permitted mining operation.
Sources
Editorial Disclosure
This article is based on a press release issued by Hycroft Mining Holding Corporation on August 18, 2026, distributed via PRNewswire. Securities discussed: Hycroft Mining Holding Corporation (Nasdaq: HYMC). Mining Markets Report has not received compensation from Hycroft Mining, its management, investor relations representatives, or any third party for this coverage. No staff member or principal of Mining Markets Report holds a position in this security at the time of publication. Drill intercept grades reported here are individual exploration results and do not constitute a mineral resource or mineral reserve estimate; the company’s own release cautions that any exploration target referenced is conceptual in nature and that there has been insufficient exploration to estimate a mineral resource at this time. Silver-equivalent and gold-equivalent figures are calculated using the company’s stated price assumptions of $3,600 per ounce gold and $48 per ounce silver, which may differ from prevailing market prices, and are illustrative rather than a direct valuation. Hycroft has not completed a feasibility study for the Brimstone or Vortex zones, and the company’s SEC filings reference risks related to the prior cessation of mining operations at the Hycroft Mine and uncertainty around re-establishing commercially feasible operations. Statements regarding future drilling plans, potential mine development, and the interpretation of a feeder system at depth are forward-looking and involve known and unknown risks; actual results may differ materially. References to this company are for market context and analytical purposes only and do not constitute an investment recommendation. All securities carry investment risk including possible loss of capital. Coverage on Mining Markets Report is for informational and educational purposes only; Mining Markets Report is not a registered investment advisor. Readers should conduct their own due diligence and consult a qualified financial advisor before making investment decisions.
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