Hayden Hill New Assays 3D Modeling Results
FOUR NINES GOLD REPORTS NEW HAYDEN HILL SURFACE SAMPLE
ASSAYS RESULTS UP TO 45.4 G/T AND 3D MODELING RESULTS
VANCOUVER, BRITISH COLUMBIA, July 9, 2024, Four Nines Gold Inc. ( “Four Nines” or the “Company”)
(CSE: FNAU, OTCIQ: FNAUF) is pleased to announce new results for the Company’s surface mapping and
sampling program for the Hayden Hill Property, with the highest grade to date of 45.4 g/t. The high-grade
results are consistent with previous sampling (December 6, 2023) and support the Company’s geological
team’s hypothesis of a high grade low su lfidation model that was not drilled to depth . Surface mapping
combined with all available datasets have been used to complete three-dimensional (3D) models, which
has refined approved drill targets.
Gold mineralization at Hayden Hill is present in three (3) primary, and two (2) secondary zones within an
area of 1.3 square kilometers. The district was explored by several companies throughout the 1980s,
Amax Gold gained control of the project in 1988 and mined the deposit from 1991 – 1997, recovering
approximately 480,000 ounces of gold. Previous operators did not target structurally controlled high-
grade mineralization, as is the Four Nines approach, rather conducted exploration programs assuming
that the gold mineralization was disseminated.
Hayden Hill has not been drilled since 1997 and remains one of the few modern open pits in the Western
United States unexplored to depth. Four Nines is the first company to apply modern exploration concepts
and the low sulfidation epithermal model to the pro perty. Initial surface mapping and sampling was
conducted in 2023 with a primary objective to identify and characterize structural feeders that could host
high-grade gold-silver mineralization.
Four Nines Gold received approval from Lassen County, California, in 2023, to conduct approximately 10
acres of exploration disturbance.
Highlights:
1. 123 new assays results,
2. Highest surface gold value is 45.5 grams per metric tonne (g/t),
3. Twenty (20) samples have values > 10 g/t Au,
4. Thirty-four (34) samples have values > 5 g/t Au,
5. Fifty (50) samples have values > 3 g/t Au,
6. Three-dimensional (3D) modeling of all available datasets indicates high quality drill targets.
David Flint, VP Exploration of Four Nines Gold said “We are extremely pleased with the additional 2024
gold assay results from surface mapping and sampling at our Hayden Hill project. Numerous epithermal
veins have been mapped and sampled, plus several significant hydrothermal breccia bodies have also been
identified. The gold geochemical results are highly encouraging. The recent results add significantly to
our understanding of the distribution and gold values for the Nose epithermal veins and hydrothermal
breccias. The 3D gradeshell modeling effort has defined multiple high-quality, high-probability exploration
targets that can be executed from the existing approved drill sites”.
Surface Program Technical Results
Summary
The primary goal of the 2023 field program was to characterize mineralized features that might confirm
the geological team’s hypothesis of a structurally controlled high-grade epithermal gold mineralization
deposit. Pit highwalls, historical trenches and pits, undisturbed outcrops, and areas of subcrop have been
mapped and sampled. The Four Nines geologic al team collected 331 surface selective rock chip grab
samples (the “2023 samples” , Figure 1) for which 265 assays have been re ceived. The results for the
samples assayed in 2023 (the “2023 assays”) have been disclosed in a 2023-12-06 press release. This press
release discloses the summary results for 123 samples collected in 2023 that have not been previously
reported (the “2024 assays”).
The highest gold value for the 2024 assays is 45.4 g/t. Seven (7) samples have values > 10 g/t, 12 have
values > 5 g/t, 16 have values > 3 g/t, 31 have values > 1 g/t, 38 have values > 0.5 g/t, and 85 have values
< 0.5 g/t. Highlight comments for the 2024 sample results include:
• The highest gold grade, of 45.4 g/t, was from a sample collected on a northwest trending
banded vein in the Nose Zone,
• Five (5) of the 7 gold assays > 10 g/t were for samples collected in the Nose Zone, further delineating
mineralization associated with the northeast trending Rim Vein and the intersection with northwest
trending veins,
• Six (6) of the gold grades > 1 g/t were for samples collected in the southeast area of Hayden Hill –
requires further mapping and sampling,
• One (1) high-grade gold value of 14.15 g/t was for a sample collected in the Juniper Zone,
• Two (2) gold grades > 3 g/t were for samples collected from northwest trending veins that cross the
west wall of the Lookout Pit,
• One (1) sample, with a gold grade of 8.87 g/t, was collected from the West Providence Vein – requires
further mapping and sampling, and
• A sample, with a gold grade of 24 g/t, was collected from the northern extension of the 214 Vein on
the Nose.
The highest gold value for the consolidated 2023 sample set (2023 & 2024 assays), for which assays have
been received, is 45.4 g/t. T wenty (20) samples have gold values > 10 g/t , 34 have values > 5 g/t , 50
have values > 3 g/t, 77 have values > 1 g/t, 92 have values > 0.5 g/t, and 173 have values < 0.5 g/t. Follow-
up sampling for regions with higher grade initial values will be conducted during the 2024 field season.
The mapping and assay results continue to verify the Company’s geological team’s hypothesis of dominant
structural orientation, in three primary zones of the property (Figure 2 – the Lookout, Providence, and
Golden Eagle zone s). Epithermal quartz veins and breccia bodies are located along these high -angle
structures and are the targets for the Phase 1 drill program.
The following s tyles of hydrothermal features, favorable for the presence of epithermal gold-silver
mineralization, have been mapped and sampled on the Property:
• Multiple banded epithermal veins,
• Clast-support hydrothermal breccias (clasts comprise > 50% of the breccia volume),
• Matrix-supported hydrothermal breccias, for which the hydrothermal matrix comprises > 50% of the
breccia volume. Clasts of previously veined material are common,
• Euhedral adularia and quartz replacement of individual calcite crystals is locally present,
• Pervasive silicification, that is reported to also include fine -grained adularia, is the most widespread
form of hydrothermal alteration present in the Project area.
The surface samples have been analyzed by the ALS Laboratory in Reno Nevada. The samples have been
processed according to the following:
1. Preparation: Prep-31,
2. Gold assay: Au-AA23 (fire assay with AAS finish); defaults to a 2nd analysis by Au-Grav21
(gravimetric finish) when the concentration from the Au-AA23 assay is > 10 g/t,
3. Certified reference (CRM) and blank material samples have been inserted into the rock samples
submittal at a ratio of 1 standard/10 rock samples,
4. Chain of custody and security maintained from sample collection through submission to the ALS
Laboratory.
Gold assays for the QA/QC samples are: 1) 20 of 21 assays for the gold CRM are within an acceptable
range (one sample is 0.01 g/t outside of range), and 2) all blank sample assays are very low (9 of 10 <
0.10 g/t) with the highest value being .017 g/t.
The field program has been conducted under the supervision and direction of David Flint, the Four Nines’
VP of Exploration and Qualified Person.
Figure 1: Four Nines Gold Surface Sampling Locations
Figure 2: Hayden Hill Mineral Zones and Epithermal Vein Orientations
Three-Dimensional Modeling Technical Discussion
The Three-Dimensional Modeling summary results have recently been disclosed in the Four Nines Gold
Inc. “June 2024” corporate presentation update, which was announced to the public in a 2024-06-11 press
release. The information provided below provides additional technical details on the modeling
methodology and interpretation of results.
Three-dimensional modeling of the available data sets , utilizing the Leapfrog Software System, was
accomplished during the 1st half of 2024. The primary objective of the modeling exercise was to determine
if discrete definable 3D zones of gold mineralization are indicated from the historical data, and the
possible correlation to mineralized geologic structures define d by the Four Nines geologic team. The
following datasets have been analyzed during the modeling exercise:
1. Historical surface mapping of the pre-mine topography,
2. Historical exploration drill holes,
3. Historical blast-hole assay results (7 x 7 x 7 m three-dimensional array of assays), and the
4. Four Nines 2023 surface mapping and sampling.
The following were modeled in three-dimension:
1. Significant epithermal veins and mineralized faults (colored green in Figure 3),
2. Hydrothermal breccia bodies (colored blue in Figure 3),
3. Grade shells and a 0.03 troy ounce per short ton (opt) (approximately 1 g/t),
4. Shells, internal to the 0.03 opt shells, at an enclosing grade of 0.05 opt (colored red in Figure 3),
5. Geologically indicated targets ( locations for which drill data is sparse) and extensions to the data -
defined grade shells (colored blue in Figure 3).
Geologic features were modeled in three-dimension based on the mineralized structures mapped on the
present topographic surface. Veins and faults were projected to depth according to the measured strike
and dip. Breccia bodies, developed along veins, were projected to depth , sympathetic to the associated
vein. Exploration drill data, where available, was utilized to refine the sub -surface geometry of these
features. Historical vein mapping was modeled to depth for locations where surface expressions of
individual features have been overlain by reclaimed material.
The grade shells have been determined according to the following methodology:
1. Historical exploration and blast hole, and surface gold values reviewed in plan view,
2. Polygons that enclosed gold values > 0.03 opt were explicitly drawn,
3. The analysis was similarly completed on multiple levels, on an approximate 7 meter vertical spacing
(the vertical spacing of the production blast-hole data),
4. Three-dimensional solids were constructed from vertically correlated polygons to establish a discrete
mineralized zone,
5. Multiple definable mineralized zones have been modeled.
The definition of polygons has been highly influenced by the blast -hole data for the volumes that have
been excavated through historical mining. The historical exploration drilling provided the primary data to
extend shells beneath the current pit. Mineralized structures that are highly correlated to the shells have
been utilized to model geologically indicated extensions to depth. A plan view of these 3D models is shown
in Figure 3. The 3D models verify the deep drill targets, as shown in Figure 4.
Readers are cautioned that the historical drill data has not been verified by a Qualified Person, however,
is judged to be of sufficient quality to utilize for exploration planning.
Figure 3 Hayden Hill District Breccia, Vein & Gradeshell Models
Figure 4: Schematic Section of Exploration Targets (Section Line from Figure 2 and 5)
Mineral Zones
The following are highlights of the mapping and sampling , and modeling, results for the Hayden Hill
primary mineral zones.
Lookout Zone
• Highest gold value of 13.7 g/t,
• Consistently high gold grades for the grab samples collected above and below the pit ramp (at 679,200
Easting),
• North-south trending epithermal veins (approximately up to 1 meter thick) (Figure 5) post-date the
pervasive silicification,
• Less common northeast & northwest trending veins are also present (Figure 5),
• Four gradeshells (for which 3 are shown on Figure 6) have been modeled in the Lookout Zone. The
four shells enclose a large majority of the drill hole assays for the zone above a 0.03 opt grade,
• These gradeshells and surface mapping results define high-quality, high-probability drill targets.
• Five permitted drill sites (blue stars), for which 4 are displayed on Figures 5 & 6,
• Majority of the Amax Gold historical gold production was from the Lookout Pit,
• Host rocks include a fine -grained volcaniclastic on higher benches, and a dacite breccia at the lower
two benches,
• Much of the exposed rock has been pervasively silicified (and reported to be quartz-adularia),
• Two veins (of which 1 has an associated hydrothermal breccia) occur at the core of the Lower
Telegraph mineral zone (Figure 6, shown in green),
• Mineralization associated with the 214 Vein is present in the hangingwall of that structure,
• A structural control has yet to be determined for the Northern High-Grade Zone (Figure 7), which has
been modeled based on historical exploration drilling,
• An additional vein, the “Ramp Vein”, has been mapped just east of the mine ramp at the UTM Easting
of about 679200 (Figure 5). Two grab samples, with gold grades of 7.1 & 8.6 g/t, have been received
on the 1-meter- thick vein: currently insufficient data available to determine a 3D model for the vein.
Figure 5: Lookout Zone – Surface Mapping and Sampling Results
Figure 6: Lookout 3D Grade Shell & Vein Models