Colosseum BFS Drilling Returns Wide Intercepts in North Pipe

Rhea-AI Summary

Dateline Resources (OTCQB:DTREF / ASX:DTR) reported further reverse circulation drilling results at its 100% owned Colosseum Gold‑REE Project in San Bernardino County, California on December 3, 2025. Two holes beneath the North Pit returned intercepts that exceed the current Indicated block grades and are expected to improve nearby mineral resource grades in a new estimate planned for early 2026.

Key intercepts: RC25‑001: 64.0m @ 1.24 g/t Au from 0m (incl. 7.66m @ 3.16 g/t Au from 53.34m). RC25‑004: 132.58m @ 0.95 g/t Au from 3.05m (incl. 3.05m @ 7.09 g/t Au from 112.8m). Drilling paused for Thanksgiving and will resume shortly; a bankable feasibility study continues.

Positive

• RC25-004: 132.58m @ 0.95 g/t Au from 3.05m
• RC25-001: 64.0m @ 1.24 g/t Au from 0m
• High-grade zones including 3.05m @ 7.09 g/t Au
• Intercepts exceed current Indicated block grades
• New mineral resource estimate planned early 2026

Negative

• None.

News Market Reaction

+2.44%

1 alert

+2.44% News Effect

On the day this news was published, DTREF gained 2.44%, reflecting a moderate positive market reaction.

Data tracked by StockTitan Argus on the day of publication.

Key Figures

RC25-001 intercept: 64.0 m @ 1.24 g/t Au RC25-001 high-grade zone: 7.66 m @ 3.16 g/t Au RC25-004 intercept: 132.58 m @ 0.95 g/t Au +5 more

8 metrics

RC25-001 intercept 64.0 m @ 1.24 g/t Au From 0 m beneath existing North Pit

RC25-001 high-grade zone 7.66 m @ 3.16 g/t Au From 53.34 m depth in North Pipe

RC25-004 intercept 132.58 m @ 0.95 g/t Au From 3.05 m depth in North Pipe

RC25-004 high-grade interval 3.05 m @ 7.09 g/t Au From 112.8 m depth in North Pipe

RC25-001 near-surface high grade 1.52 m @ 5.68 g/t Au From 30.48 m depth

Mineral resource estimate timing Early 2026 Planned new mineral resource estimate for Colosseum

Project ownership 100% Dateline ownership of Colosseum Gold-REE Project

Price vs 52-week high -64.63% Current price vs 52-week high of 0.4697

Market Reality Check

Price: $0.2976 Vol: Volume 5,826,384 is 6% ab...

normal vol

$0.2976 Last Close

Volume Volume 5,826,384 is 6% above the 20-day average of 5,484,834. normal

Technical Price 0.16615 is trading above the 200-day MA of 0.14 ahead of this update.

Peers on Argus

Gold peers showed mixed moves, with OREZONE GOLD CORP up 1.47%, G2 GOLDFIELDS IN...

Gold peers showed mixed moves, with OREZONE GOLD CORP up 1.47%, G2 GOLDFIELDS INC up 5.83%, while ROBEX RES INC fell 2.58%. No consistent sector-wide direction suggests this was more stock-specific.

Historical Context

5 past events · Latest: Dec 03 (Positive)

Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Dec 03	Drilling results update	Positive	+2.4%	North Pit RC holes exceeded Indicated grades, supporting resource upgrade potential.
Oct 27	BFS progress update	Positive	-18.7%	BFS drilling 67% complete and stockpile work advanced ahead of mine planning.
Oct 27	BFS drill program	Positive	-18.7%	Details on 32-hole BFS program and stockpile drilling for mine plan inclusion.
Oct 20	Geophysical review	Positive	+9.2%	Independent 3D geophysical work ranked six breccia-pipe targets for drilling.
Sep 24	REE target validation	Positive	-4.3%	Second MT model confirmed a high-priority REE target at line 2200N.

Pattern Detected

Project updates and technical progress at Colosseum have produced mixed reactions, with both strong gains and sharp declines, indicating inconsistent alignment between positive news flow and short-term price moves.

Recent Company History

Over the last few months, Dateline has focused on advancing the Colosseum Gold‑REE Project with drilling, geophysics, and BFS work. On Sep 24, REE targeting news saw a -4.34% move. A 3D geophysical review on Oct 20 coincided with a 9.24% gain. BFS drilling and stockpile updates on Oct 27 linked to a -18.7% reaction. Today’s Dec 3 drilling results, which exceeded Indicated grades, saw a more modest 2.44% gain, continuing the pattern of variable responses to generally constructive project news.

Market Pulse Summary

This announcement highlights broad, higher-grade intercepts from RC25‑001 and RC25‑004 that exceeded...

Analysis

This announcement highlights broad, higher-grade intercepts from RC25‑001 and RC25‑004 that exceeded existing Indicated block grades at the Colosseum North Pipe, supporting potential resource improvement in a planned early‑2026 estimate. It builds on months of BFS drilling and geophysical work at the 100%‑owned Gold‑REE project. Investors may watch for follow-up assay results, progress of the Bankable Feasibility Study, and how updated resource figures compare with prior Colosseum targets and historical stock reactions.

Key Terms

reverse circulation, rare earth element, indicated mineral resource, assay, +2 more

6 terms

reverse circulation technical

"two reverse circulation (RC) holes drilled below the North Pit"

Reverse circulation is a drilling method used in mineral exploration where rock fragments are lifted to the surface inside an inner tube while drilling, keeping samples cleaner and faster than conventional techniques. Investors care because it provides quicker, more reliable samples for estimating how much mineral or ore might be present, reduces exploration costs and drilling time, and therefore can speed up or improve the quality of resource assessments that drive project value.

rare earth element medical

"Colosseum Gold and Rare Earth Element (REE) Project in San Bernardino"

A rare earth element is one of a set of 17 metallic chemical elements used as essential ingredients in many high-tech products, from smartphones and electric motors to wind turbines and defense systems. Investors care because these metals are critical inputs whose limited, geographically concentrated supply and complex extraction processes can drive price swings and create strategic risks or advantages for companies that mine them or depend on them—like a key spice that can make or break a recipe.

indicated mineral resource technical

"exceed the mineral resource grade for the Indicated blocks that they intercepted"

A quantified portion of a mineral deposit where geological evidence and sampling give a reasonable level of confidence in the quantity, grade and continuity of the minerals — think of it as a well-marked stretch on a treasure map rather than a vague hunch. It matters to investors because it provides a credible estimate that can be used for preliminary economic studies and valuation, reducing uncertainty compared with less-certain resource categories.

assay technical

"have provided gold assay results that exceed the mineral resource grade"

An assay is a laboratory test that detects or measures how much of a specific substance is present or how well something performs, like measuring a drug’s concentration, a material’s purity, or a biomarker’s level. For investors, assay results act like a thermometer or quality check: they provide objective evidence about a product’s effectiveness, safety, or manufacturing consistency, and can strongly influence regulatory approval, market acceptance, and company valuation.

bankable feasibility study financial

"as the Bankable Feasibility Study progresses"

A bankable feasibility study is a comprehensive, independently reviewed analysis that shows whether a proposed project is technically sound, legally clear, environmentally acceptable and financially viable enough for banks or other lenders to provide long-term financing. Think of it as a detailed business plan plus an inspector’s report that quantifies costs, revenue forecasts and key risks; investors use it as evidence that the project can deliver returns and secure the funding needed to proceed.

open pit technical

"illustrating the existing open pit outline and gold intercepts"

A large, surface excavation where rock and soil are removed in stepped layers to reach and extract mineral deposits; picture a terraced, man‑made quarry reaching down to the ore. It matters to investors because open‑pit operations tend to produce high volumes at lower unit cost but require large up‑front investment, long operating life, and carry visible environmental and permitting risks that can affect production, costs and company value.

AI-generated analysis. Not financial advice.

SAN BERNARDINO, CALIFORNIA / ACCESS Newswire / December 3, 2025 / Dateline Resources Limited (ASX:DTR)(OTCQB:DTREF)(FSE:YE1) is pleased to announce further drilling results at its 100%-owned Colosseum Gold and Rare Earth Element (REE) Project in San Bernardino County, California. The results from a further two reverse circulation (RC) holes drilled below the North Pit have provided gold assay results that exceed the mineral resource grade for the Indicated blocks that they intercepted, with the expectation that this result will improve the mineral resource grade for the blocks in the vicinity when a new mineral resource estimate is undertaken early in 2026.

Highlights

• Strong gold intercepts confirm the continuity of mineralisation at depth in the North Pipe:

  • RC25-001 returned 64.0m @ 1.24 g/t Au from 0m (beneath the existing north pit)

    • Incl. 1.52m @ 3.17g/t Au from 3.05m

    • And 1.52m @ 5.68g/t Aufrom 30.48m

    • And 7.66m @ 3.16g/t Aufrom 53.34m

  • RC25-004 returned 132.58m @ 0.95 g/t Au from 3.05m

    • Incl. 3.05m @ 3.25g/t Aufrom 27.43m

    • Incl 3.05m @ 7.09g/t Aufrom 112.8m

RC25-001 returned a broad intercept of 64.0m @ 1.24g/t Aufrom surface, including a high-grade zone of 7.66m @ 3.16g/t Aufrom 53.34m.

RC25-004 had a broad intercept of 132.58m @ 0.95g/t Aufrom 3.05m. incl 3.05m @ 3.25g/t Aufrom 27.43m and 3.05m @ 7.09g/t Aufrom 112.8m).

Both of these holes have returned higher grades than currently estimated in the Indicated mineral resource blocks they intercepted.

Figure 1: Plan view showing the drillholes mentioned in this announcement as well as the orientation of the cross section shown in Figure 2.

Figure 2: Cross-section of the Colosseum deposit illustrating the existing open pit outline and gold intercepts

Drilling was suspended for the Thanksgiving holiday in the United States and is planned to recommence in the coming days.

Dateline will continue to update shareholders as additional assay results are received and as the Bankable Feasibility Study progresses. The Company remains confident that the drilling program will confirm the feasibility of the Colosseum Gold-REE Project by better defining the mineral resource base and de-risking the path to production.

This press release has been authorized for release by the Board of Dateline Resources Limited.

For more information, please contact:

Stephen Baghdadi
Managing Director
+61 2 9375 2353

Andrew Rowell
Corporate & Investor Relations Manager
+61 400 466 226
a.rowell@dtraux.com
www.datelineresources.com.au

Follow Dateline on socials:
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About Dateline Resources Limited

Dateline Resources Limited (ASX:DTR)(OTCQB:DTREF)(FSE:YE1.F) is an Australian company focused on mining and exploration in North America. The Company owns 100% of the Colosseum Gold-REE Project in California.

The Colosseum Gold Mine is located in the Walker Lane Trend in East San Bernardino County, California. On 6 June 2024, the Company announced to the ASX that the Colosseum Gold mine has a JORC-2012 compliant Mineral Resource estimate of 27.1Mt @ 1.26g/t Au for 1.1Moz. Of the total Mineral Resource, 455koz @ 1.47/t Au (41%) are classified as Measured, 281koz @1.21g/t Au (26%) as Indicated and 364koz @ 1.10g/t Au (33%) as Inferred.

On 23 May 2025, Dateline announced that updated economics for the Colosseum Gold Project generated an NPV6.5 of US$550 million and an IRR of 61% using a gold price of US$2,900/oz.

The Colosseum is located less than 10km north of the Mountain Pass Rare Earth mine. Planning has commenced on drill testing the REE potential at Colosseum.

Dateline has also acquired the high-grade Argos Strontium Project, also located in San Bernadino County, California. Argos is reportedly the largest strontium deposit in the U.S. with previous celestite production grading 95%+ SrSO4.

Forward-Looking Statements

This announcement may contain "forward-looking statements" concerning Dateline Resources that are subject to risks and uncertainties. Generally, the words "will", "may", "should", "continue", "believes", "expects", "intends", "anticipates" or similar expressions identify forward-looking statements. These forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those expressed in the forward-looking statements. Many of these risks and uncertainties relate to factors that are beyond Dateline Resources' ability to control or estimate precisely, such as future market conditions, changes in regulatory environment and the behavior of other market participants. Dateline Resources cannot give any assurance that such forward-looking statements will prove to have been correct. The reader is cautioned not to place undue reliance on these forward-looking statements. Dateline Resources assumes no obligation and does not undertake any obligation to update or revise publicly any of the forward-looking statements set out herein, whether as a result of new information, future events or otherwise, except to the extent legally required.

Competent Person Statement

Sample preparation and any exploration information in this announcement is based upon work reviewed by Mr Greg Hall who is a Chartered Professional of the Australasian Institute of Mining and Metallurgy (CP-IMM). Mr Hall has sufficient experience that is relevant to the style of mineralization and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting Exploration Results, Mineral Resources and Ore Reserves" (JORC Code). Mr Hall is a Non-Executive Director of Dateline Resources Limited and consents to the inclusion in the report of the matters based on this information in the form and context in which it appears.

Company Confirmations

The Company confirms it is not aware of any new information or data that materially affects the information included in the announcements dated 23 October 2024 with regard to the Colosseum MRE and 23 May 2025 with regard to Colosseum Project Economics. Similarly, the Company confirms that all material assumptions and technical parameters underpinning the estimates and the forecast financial information referred to in those previous announcements continue to apply and have not materially changed.

SOURCE: Dateline Resources Limited

View the original press release on ACCESS Newswire

FAQ

What gold intercept did Dateline Resources report for RC25-004 at Colosseum (DTREF) on Dec 3, 2025?

RC25-004 returned 132.58m @ 0.95 g/t Au from 3.05m, including 3.05m @ 7.09 g/t Au from 112.8m.

How did RC25-001 perform in Dateline Resources' Dec 3, 2025 Colosseum update (DTREF)?

RC25-001 returned 64.0m @ 1.24 g/t Au from surface, including 7.66m @ 3.16 g/t Au from 53.34m.

Will the Dec 3, 2025 Colosseum drill results affect Dateline Resources' mineral resource (DTREF)?

Yes; the company expects these higher-grade intercepts to improve nearby Indicated block grades in a new resource estimate planned early 2026.

When will Dateline Resources resume drilling at Colosseum after the Dec 3, 2025 release (DTREF)?

Drilling was suspended for the Thanksgiving holiday and is planned to recommence in the coming days following the announcement.

Does Dateline Resources plan a feasibility study after the December 2025 Colosseum results (DTREF)?

Yes; the company said the Bankable Feasibility Study is progressing and drilling aims to better define the resource and de-risk the path to production.