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TUNG.CN ·

Update on Exploration Plan and Technical Report

Technical Reports (NI 43-101) Exploration Programs

American Tungsten Corp. Identified Multiple Exploration Targets

at Ima Mine & Provides an Update on its Technical Report

Vancouver, BC, June 10, 2025 – American Tungsten Corp. (CSE:TUNG) (OTCQB:DEMRF)

(FSE:RK9) (“American Tungsten” or the “ Company”) is pleased to provide an update on its

exploration plans and independe nt technical report (the “ Technical Report ”) prepared in

accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI

43-101”) for its tungsten project, the Ima Mine, located in Idaho, United States.

American Tungsten is currently working with qua lified mining and drilling contractors to scope

and cost its summer 2025 explor ation program. The Technical Re port on the Ima property has

been published today and is available on SEDAR+. The exploration program, as described in the

press release dated March 12, 2025, entails rehabilitation of the D level of the mine to support

underground exploration drilling and collection of a bulk sample for metallurgical testwork.

Exploration Plan & Targets

American Tungsten’s ongoing compilation of hist orical mining and dril lhole information has

identified multiple exploration targets on the Ima property. Polymetallic tungsten-silver bearing

quartz vein exploration targets include the northeastern extension of the No.5 and No.7 veins, the

southwest extension of the West Ima vein, the Eastern Vein system, and the main Ima vein below

the historical mine (Figure 1). Additionally, the vein system is known to extend to the south across

Patterson Creek based on historical exploration by the Defense Minerals Exploration Agency.

American Tungsten is actively planning a drill program to delineate the northeastern extension of

the No 5. and No. 7 veins, and also assess continuity of vein systems in West and East Ima vein

targets, discussed below.

“While our summer program is focused on delineation of the No. 5 and No. 7 veins, the additional

exploration targets identified to date demonstrate significant up-side potential of the Ima property.”

Said Ali Haji, CEO of American Tungsten. “Significant tungsten drillhole intercepts from Gentor

and Inspiration campaigns, outside of areas mined historically, pr ovide compelling low-risk drill

targets for expansion of known mineralization.”

Exploration data discussed below include historical information wh ich has not been verified and

results from widely spaced drill holes and sampling. The quantity and grade of potential

exploration targets is conceptual in nature. There has been insufficient exploration to define

a mineral resource and it is uncertain if furth er exploration will result in the target being

delineated as a mineral resource. Drill hole results discussed below are based on historical

information, which has not been verified by sampling or assaying and should only be used to

assess the potential grade of mineralisation, which may be targeted in future exploration

programs.

Figure 1: Ima Mine Exploration Target Location Map

No. 5 and No. 7 Veins

Only limited stoping was conducte d above the D-level prior to ces sation of mining in 1957. The

No.5 and No.7 veins dip moderately to the so uthwest and extend up-dip (north east) from the D-

level based on underground mapping and Inspiration Development drillhole intersects. Inspiration

reported underground channel sampling results from the No.5 vein of 0.44% WO3 0.043% MoS2

and 2.63 opt Ag with an average true width of 5. 3’ over a strike length of 520 feet, and from the

No. 7 vein of 0.43%WO3 0.041% MoS2 and 2.01 opt Ag with an average width of 6 feet over a

strike length of 408 feet2.

Sampling of the No.7 vein in an oblique crossc ut 500 feet to the south was reported as 0.535%

WO3, 0.055% MoS2 and 0.49 opt Ag with an average width of 5.3 fe et over a length of 80 feet.

Inspiration drillhole ID-9 intersected the vein system approximately 700 feet up dip and reportedly

returned 4.6 feet at 1.09% WO3, 0.05% MoS2 and 1.15 opt Ag. The No 5 and No. 7 veins are also

intersected in drilling to the north and an additional vein, the No. 3 vein is intersected in the

footwall on the D level in Bradley Mining company drilling.

Based on simplified volumetric estimates and hist orically reported grades, the historical drilling

and sampling delineates a conceptual exploration target of 2-3 para llel stacked veins 4 to 6 feet

wide extending approximately 1000 feet along strike and 500 feet up-dip containing 300-400k tons

of mineralized materials with grades of 0.4-1.0% WO3 and 1-2 opt Ag.

Ima West Vein – Southwest Extension

Gentor drilling from the D-level portal intersected significan t tungsten-silver mineralization in

quartz veins between the zero leve l and the 200 level of the Ima mi ne, south of the water fault,

approximately 300 to 575 deep. Gentor drillh ole IMA-21 intersected 0.5% WO3, 0.028% MoS2

and 0.99 opt Ag over 20.5 feet, and 0.68% WO 3, 0.084% MoS2 and 0.7 opt Ag over 6 feet.

Drillhole IMA-26A intersected 1.29% WO3, 0.055% MoS2 and 1.49 opt Ag over 6.5 feet. These

intercepts occur 200 and 500 feet along strike a nd beyond the southern extent of historical

underground mining in a western sp lay of the Ima vein system. The interpreted along strike

southeast continuation is untested and remains open to the south along strike.

Based on simplified volumetric estimates, historically reported grades, and estimates of true width,

the drilling delineates a conceptual exploration target of one or two steeply dipping parallel veins

or vein arrays 3 to 10 feet wide extending approximately 400 feet up dip and 500 feet along strike

containing 50-150k tons of minera lized materials with grades of 0.5-1% WO3 and 1-2 opt Ag,

with additional extension to the southeast possible.

Eastern Vein System

Presence of an additional vein sy stem located northeast of the principal Ima vein system is

supported by historical drilling a nd drift sampling. This zone was identified as a target area by

Inspiration Development, and is further supported by deeper Gentor drillhole intercepts. Historical

stope sections do not show signi ficant mining in this area. No rtheast directed Midwest Co.

drillholes from the zero level are reported to have intersected significant mineralization including

0.47% WO3, 0.05% MoS2 and 2.3 opt Ag, over 3 feet in drillhole MW-02 and 0.58% WO3, .016%

MoS2 and 1.6 opt Ag over 10 feet in MW-03. Drift sampling by AMAX on the 360 level in the

No.9 crosscut is reported by Inspiration as 0.28% WO3, 0.1% MoS2 and 0.59 opt Ag over 90 feet.

Gentor drillhole IMA-27 intersected 30 feet grading 0.2% WO3 includi ng 5 feet grading 0.53%

WO3, 0.129% MoS2 and 0.41 opt Ag and 4.9 feet grading 1.26%WO3, 0.07% MoS2 and 1.55 opt

Ag, 200 feet below the 360 level and proximal to the molybdenum mineralized granitic cupola.

Based on simplified volumetric estimates, historically reported grades, and estimates of true width,

the drilling delineates a conceptual exploration target consisting of one or two steeply dipping

veins or vein arrays 3-7 feet wide, extending approximately 500 feet up dip and 800 feet along

strike containing 100-200k tons grading 0.5-1% WO3 and 0.5-1.5 opt Ag. Significant additional

mineralized materials are possible if broader zones of lower grad e tungsten mineralization, such

as that in the No. 9 crosscut and drillhole IMA-27 is delineated.

Main Ima vein system below the mine

Significant tungsten mineralization was intercepted in Gentor drillholes 200 to 800 feet below the

lowermost levels of the Ima mine main vein system , interpreted as the extension of the Ima vein

at depth. Intercepts include 16.5 feet grading 0.710% WO3 and 0.73 opt Ag and 5 feet grading

1.26% WO3 and 5.2 opt Ag in IMA-28A, 7.1 feet grading 0.6% WO3 and 0.93 opt Ag and 5 feet

grading 1.06% WO3 and 0.26 opt Ag in IMA-24, and 7.2 feet grading 0.43% WO3 and 1.05 opt

Ag in IMA-22. Intercepts may not represent true width of mineralization.

Based on simplified volumetric estimates, historically reported grades, and estimates of true width,

the drilling delineates a conceptual exploration target consisting of two to three steeply dipping

veins or vein arrays 3-6 feet wide, extending approximately 800 feet down dip and 500 feet along

strike containing 200-400k tons grading 0.5-1% WO3 and 0.5-2 opt Ag.

Continuation of vein system south of Patterson Creek

An exploration program conducted by the Defe nse Minerals Exploration Agency (DMEA)

identified a 4 foot wide tungs ten bearing quartz vein on the south side of Patterson Creek,

intersected in an exploration cro sscut. The vein strikes parallel to the main Ima vein system but

dips moderately to the northeast. The DMEA reports that “The exploration has proven that the Ima

vein zone continues southward across Patterson Canyon; thus the possible tungsten bearing area

has been greatly extended.” 3 There is insufficient informati on currently available to define a

conceptual exploration target but additional expl oration on the south side of the canyon may be

warranted.

Molybdenum Mineralization

Drilling by Gentor was successful in ex tending the boundaries of known molybdenum

mineralization to the east, and supported a historical 43-101 compliant Mineral Resource Estimate

for molybdenum mineralization occurring below th e Ima mine. Gentor drillholes IMA-27 and

IMA-30 are the easternmost drillholes complete d in the molybdenum ta rget and intersected

significant widths and higher grades than prior drilling, including 0.25% over 475 feet and 0.28%

over 368 feet. This mineralization is open to the northeas t and supports a conceptual exploration

target within the granitic stock extending approximately 1000 feet along strike, 300 feet down dip

and of unknown width to the north east.

Exploration data discussed above include historical information which has not been verified and

results from widely spaced drill holes and sampling. The quantity and grade of potential

exploration targets is conceptual in nature. There has been insufficient exploration to define

a mineral resource and it is uncertain if furth er exploration will result in the targets being

delineated as a mineral resource.

Update on Technical Report

Ima Mine Technical Report

The technical report on the Ima mine has been published today and is available on SEDAR+. The

technical report was prepared by A to Z Mining Professionals and is authored by Mr. Brian

LeBlanc, a Qualified Person as defined by NI43-101.

The Ima Mine is a past producing underground t ungsten mine situated on 22 patented claims

located in East Central Idaho. Between 1945 and 1957, the property pr oduced approximately

199,449 MTUs of WO3 and was subsequently explored for molybdenum and tungsten by various

operators between 1960-2008(1).

ABOUT AMERICAN TUNGSTEN CORP.

American Tungsten Corp. (previously Demesne Re sources Inc.) is a Ca nadian-based company

involved in the acquisition and e xploration of magnetite mineral properties. The Company's Star

Project consists of five contiguous mineral titles covering an area of approximately 4,615.75

hectares located in the Skeena Mining Division, British Columbia, Canada. The Company has

entered into an option agreement pursuant to which it is entitled to earn an undivided 100% interest

in the Star Project. American Tungsten has also entered into an option agreement, pursuant to

which it can acquire a 100% interest (subject to a 2% royalty) in and to the Ima Mine Project, a

past producing underground tungsten mine situated on 22 patented claims located in East Central,

Idaho, United States. In addition, the Company has acquired surrounding mining rights at its Ima

Mine Project through the staking of 113 WMO federa l lode mining claims co vering an area of

1,988.6 acres (804.75ha).

Social media links:

LinkedIn: https://www.linkedin.com/company/americantungstencorp/

X: https://x.com/amtungsten

Facebook: https://www.facebook.com/americantungstencorp/

Instagram: https://www.instagram.com/americantungstencorp/

YouTube: https://www.youtube.com/@americantungstencorp

ON BEHALF OF THE BOARD OF DIRECTORS:

Ali Haji

Chief Executive Officer

1055 West Georgia Street, Suite 1500

Vancouver, BC V6E 0B6

Canada

For further information, please contact:

Ali Haji, Chief Executive Officer

Email: [email protected]

1 Bradley Mining Company, 1958; Summarized Information on IMA Mine, Lemhi Co, Patterson, Idaho. Company Report, 6p.

2Inspiration Development Company, 1979; 1979 Progress Report. Company Report, 13p.

3DMEA, 1954; Final Report, Ima Mine, Blue Eing Mining District, Lemh County, ID, contract Idm-E41.

Phone: +1 (647) 871-4571

CSE:TUNG

OTCQB:DEMRF

FSE:RK9

The Canadian Securities Exchange does not accept responsibility for the adequacy or accuracy of

this release and has neither approved nor disapproved the contents of this press release.

This news release includes certain statem ents that may be deemed “forward-looking

statements”. All statements in this news release, other than statements of historical facts, that

address events or developments that the Com pany expects to occur, are forward-looking

statements. Forward-looking stat ements are statements that ar e not historical facts and are

generally, but not always, identified by the words “believes”, “expects”, “plans”, “anticipates”,

“intends”, “estimates”, “projects”, “potential” an d similar expressions, or that events or

conditions “will”, “would”, “may”, “could” or “should” occur. Although the Company believes

the expectations expressed in such forward- looking statements are based on reasonable

assumptions, such statements are not guarantees of future performance and actual results may

differ materially from those in the forward-look ing statements. Forward looking statements in

this news release include statements respectin g: (i) the Ima Mine Project and the mineral

prospects thereon, (ii) the Company's perfor mance of its obligations under the Option

Agreement, and the exercise of the option thereunder, and (iii) the Company's planned activities

on the IMA Mine Project. Factors that could cause the actual results to differ materially from

those in forward-looking statements include the receipt of regulatory approvals, market prices,

continued availability of capital and financing, and general economic, market or business

conditions. Investors are cautioned that any such statements are not guarantees of future

performance and actual results or developments ma y differ materially from those projected in

the forward-looking statements. Forward-looking statements are based on the beliefs, estimates

and opinions of the Company’s management on the date the statements are made. Except as

required by applicable securiti es laws, the Company undertakes no obligation to update these

forward-looking statements in the event that management's beli efs, estimates or opinions, or

other factors, should change.

Exploration data discussed in th is news release include historical information which has not

been verified and results from widely spaced drill holes and sampling. The quantity and grade

of potential exploration targets is conceptual in nature. There has been insufficient exploration

to define a mineral resource and it is uncertain if further exploration will result in the target

being delineated as a mineral re source. Drill hole results are bas ed on historical information,

which has not been verified by sampling or assa ying and should only be used to assess the

potential grade of mineralisation, which may be targeted in future exploration programs.

Technical information in this news release has been prepared in accordance with Canadian

regulatory requirements set out in National In strument 43-101 — Standards of Disclosure for

Mineral Projects (“NI-43-101”). Austin Zinsser, P.G., SME-RM, Vice President, Exploration

for the Company, and a Qualified Person as defined by NI-43-101, has reviewed and approved

the scientific and technical information in this Presentation.