The Yellow Band project is in the well-known historical Argenta Mining District.
The Yellow Band consists of 337 unpatented mining claims.
The initial 20 claims were consolidated by a single landowner beginning in 1934 – and were kept in good standing ever since that time.
In 2002, three more claims were added.
In 2021, Gold Express Mines, Inc. staked an additional 155 claims.
In 2023, Gold Express Mines, Inc. staked an additional 159 claims.
The Yellow Band provides a unique opportunity with existing drilled resources. An additional upside exists to expand the resource along a 5-mile strike.
Existing Historic Mineral Resource estimates (all categories) range from 1.2 MT at 0.378 opt Au to 1.9 MT at 0.283 opt Au with silver credit of ~2.7 opt Ag.
Location and Access
The Yellow Band property is located 16 miles northwest of Dillon, Montana (population 5,000), the county seat of Beaverhead County. The unpatented mining claims on which the project is located are in the historic Argenta Mining District within the Beaverhead National Forest in the Pioneer Mountains. Access from Dillon is via Interstate I-15 south for three miles and west on Montana State Highway 278 for 8 miles then north on maintained gravel road passing through the mining town of Argenta for a further eight miles along the USFS French Creek – Birch Creek gravel road (FS 606).
Geology and Mineralization
The geology of the Argenta mining district and the YB project is dominated by the structures and stratigraphy of theMontana Disturbed Belt also known as the Overthrust Belt, which stretches from theBrooks Range in Alaska south to the Sierra Madre Oriental of Mexico.
In SW Montana, this Late-Cretaceous age fold-and-thrust belt consists in part of the north-to NE-trending, west-dipping imbricate Kelly Thrust zone, which has been displaced southeastward a minimum of five miles over the underlying Ermont plate.The Kelley Thrust at YB juxtaposes Mesoproterozoic Belt quartzite over Paleozoic-Mesozoic carbonate and clastic units. The low-angle zone of faulting strikes north to NE with dip angles from 10° to 50° to the west.The regional thrusting is dated Late Cretaceous at 71-68 m.y.
The Project covers a two-mile-long section of the Kelly imbricate thrust zone that is about half a mile thick on the ground. Late Tertiary-age basalt and latite porphyry rocks are also present. The YB rocks have been intruded by the 70-76my Mount TorreyBatholith to the north and west, and the undated Argenta stock to the southeast.
The geological structure is key to understanding YB mineralization and exploration. Steep dipping cross-faults (tear faults) often leave evidence of fracturing in the mineral zones. Cross faults strike north 10°E with steep to vertical dip and apparent left-lateral movement. Stratigraphic units have been displaced in the YB project by these structures and the mineralization has been stepped up toward the north.
The Argenta mining district shows distinct characteristics of porphyry-skarn-replacement mineralization like other mining districts in the area. The YB project is within the outer halo of the Argenta district, about three miles (five kms) from the outcropping Argenta stock. This does not directly indicate a relationship to porphyry-style mineralization but shows characteristics of two major mineral deposit types which are cataloged by the USGS in Cox,et al(1992).
The YB deposit falls under the:
Carbonate hosted Au-Ag; and
Gold on Flat Faults.
Yellow Band represents a complex structural breccia type, sediment-hosted gold deposit, and is similar insetting to the varied epithermal sediment-hosted gold deposits throughout the Great Basin tectonic province. Hydrothermal alteration is strongly present in the Jefferson Formation host rocks and is typical of sediment-hosted gold deposits. Alteration follows a sequence of pervasive vein-controlled calcite flooding, carbon mobilization, bleaching, calcification, re-crystallization (sometimes sanded), acid leaching, and at least three stages of silicification.
Critical geologic and gold mineralization control factors at Yellow Band:
The mineralization is fine-to-coarse-grained native Au from 15 to 125 microns in size;
There are a few sulfide minerals associated with Au, mostly pyrite and chalcopyrite;
The Au mineralization is restricted to the quartz veins and silicified breccias associated with thrust faults in and cross-cutting high-angle faults;
The mineralized quartz veins and silicified breccias are commonly crushed, fractured, or intensely re-brecciated as a result of continued movement on the faults and hydrothermal activity.
Exploration Work and Potential
May 2022: Completed Boaz Tunnel raise repairs allowing access to old mining areas for sampling; sample results were very positive;
Summer 2023: Regional geology work program completed;
December 2023: Drill Permit for resource confirmation granted;
Completed three independent metallurgy studies and recent non-cyanide recovery results are promising;
Completed new NI 43-101 report;
Recommended drill plan to confirm resource estimates;
The Company believes the existing mineral resource can be expanded by drilling the deeper “down-dip” and lateral “strike” extensions of the known systems. The probability of finding additional reserves at the Yellow Band is very good. The common suite of minerals in the system has a classic resemblance to other epithermal hot-spring gold deposits in Nevada and at other locations.