.kt-svg-item-99_53ced0-dc .kb-svg-icon-wrap, .kt-svg-style-stacked.kt-

Briefing

Resource Expansion and Mine Life Context The Colosseum Gold-REE Project currently hosts a JORC 2012-compliant Mineral Resource of 27.1Mt @ 1.26 g/t Au for 1.1Moz, of which over 67% is classiﬁed as Measured and Indicated. Key points: Resource Expansion and Mine Life Context The Colosseum Gold-REE Project currently hosts a JORC 2012-compliant Mineral Resource of 27.1Mt @ 1.26 g/t Au for 1.1Moz, of which over 67% is classiﬁed as Measured and Indicated; 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 hole terminated in mineralisation with the final bottom-of-hole sample returning approximately 1 g/t Au, confirming the gold-bearing breccia pipe remains open at depth; We are progressing the next phase of work in a disciplined way, with the objective of determining how these results can translate into longer-mine life options for the project.” Northeast Extension – Progressive Deﬁnitio; CM25-41 intersected 149.65 metres grading 1.39 g/t Au from surface to end-of-hole, including a high-grade zone of 55.2m @ 2.83 g/t Au from surface; The latest result from CM25-41 adds further conﬁdence to gold grades within this emerging zone and supports the continuity of mineralization along the northeast portion of the breccia system. This brief is based on the cited source artifact and is intended as a research entry point, not a replacement for the original source or EGM canonical data tables.

Source Notes

Resource Expansion and Mine Life Context The Colosseum Gold-REE Project currently hosts a JORC 2012-compliant Mineral Resource of 27.1Mt @ 1.26 g/t...

Extractive summary evidence · source

On 23 May 2025, Dateline announced that updated economics for the Colosseum Gold Project generated an NPV6.5 of US$550 million and an...

Extractive summary evidence 2 · source

The hole terminated in mineralisation with the final bottom-of-hole sample returning approximately 1 g/t Au, confirming the gold-bearing breccia pipe remains open...

Extractive summary evidence 3 · source

We are progressing the next phase of work in a disciplined way, with the objective of determining how these results can translate...

Extractive summary evidence 4 · source

Extracted Document Text

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Source: https://www.datelineresources.com.au/wp-content/uploads/2026/02/2602-12-DTR-NE-Extension_PR.pdf
Published: 2026-02-12T00:00:00+00:00
Fetched: 2026-05-12T14:51:18.843+00:00
Source artifact: 923e4bec-db44-4cad-bf02-a39cae1c21e6
Normalizer input: text

## Content

# .kt-svg-item-99_53ced0-dc .kb-svg-icon-wrap, .kt-svg-style-stacked.kt-svg-item-99_53ced0-dc .kb-svg-icon-wrap{color:var(--global-palette1, #3182CE);font-size:30px;}.kt-svg-item-99_53ced0-dc:hover .kb-svg-icon-wrap{color:var(--global-palette2, #2B6CB0);}
Diamond Drilling Conﬁrms Wide Gold Intercept in Northeast Extension of North Pipe at
Colosseum
Thursday, 12 February 2026 08:00 AM
Topic: Company Update
SAN BERNARDINO, CA / ACCESS Newswire / February 12, 2026 / Dateline Resources
Limited (ASX:DTR)(OTCQB:DTREF)(FSE:YE1) (Dateline or the Company) is pleased to report
results from diamond core hole CM25-41 at its 100%-owned Colosseum Gold and Rare Earth
Element (REE) Project in San Bernardino County, California. The hole was drilled in the northeast
extension of the North Pipe breccia system, an area beyond the currently defined mineral
resource boundary that has been progressively delineated through the Company's 2025 drilling
program.
CM25-41 intersected 149.65 metres grading 1.39 g/t Au from surface to end-of-hole, including a
high-grade zone of 55.2m @ 2.83 g/t Au from surface. The hole terminated in mineralisation with
the final bottom-of-hole sample returning approximately 1 g/t Au, confirming the gold-bearing
breccia pipe remains open at depth.
Dateline’s Managing Director, Stephen Baghdadi, commented:
“Colosseum continues to deliver positive results as we work systematically across the project.
This latest drilling advances our geological understanding and reinforces the view that there is
further value to be unlocked beyond those areas already deﬁned. We are progressing the next
phase of work in a disciplined way, with the objective of determining how these results can
translate into longer-mine life options for the project.”
Northeast Extension – Progressive Deﬁnition
The northeast extension of the North Pipe has been progressively deﬁned through a series of
reverse circulation (RC) and diamond core holes (DD) drilled during 2025. The latest result from
CM25-41 adds further conﬁdence to gold grades within this emerging zone and supports the
continuity of mineralization along the northeast portion of the breccia system.
Key intercepts from the northeast extension drilling program reported to date include:
Hole From (m) To (m) Length (m) Au (g/t) Comments
CM25-41 0.0 149.65 149.65 1.39 NEW – This release
Incl. 0.0 55.2 55.2 2.83 High-grade core
RC25-035 0.0 295.64 295.64 1.04 Reported 12 Jan 2026
Incl. 38.10 2.04
RC25-037 0.0 105.15 105.15 1.24 Reported 12 Jan 2026
Incl. 53.34 1.45
RC25-039 0.0 205.73 205.73 0.88 Reported 12 Jan 2026
Incl. 21.33 1.81
RC25-036 0.0 300.21 300.21 0.66 Reported 12 Jan 2026
Incl. 32.00 1.24
RC25-034 0.0 297.17 297.17 0.68 Reported 12 Jan 2026
Incl. 33.53 1.25
Note: Intercepts reported above a lower cut-off grade of 0.1 g/t Au. No upper cut-off grade has been applied. All lengths are
downhole lengths. Previously reported results sourced from ASX announcement dated 12 January 2026.
CM25-41 ended in ore-grade mineralization, indicating drilling has not yet deﬁned the limits of
this system. With the larger diamond drill rigs now mobilizing, the Company intends to fully test
the extent of this zone.
Dateline is working to determine if this newly deﬁned northeast extension can extend the mine
life beyond the approximately eight and a half-year open-pit operation outlined in the May 2025
Scoping Study. Any additional resources delineated in this section could potentially prolong the
mine life, with the opportunity for an underground mining phase to follow after open-pit mining is
completed.
Figure 1: Plan view showing 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 ﬂoor and gold intercepts
Next Steps
To fully delineate the potential of the northeast extension, larger-capacity diamond core drill rigs
will be used to:
• Test the deeper portions of the North Pipe breccia system, beyond the ~300m depth
reached,
• Provide continuous core samples for detailed geological analysis,
• Better delineate the geometry and orientation of the breccia pipe at depth and along
strike, and,
• Assist in the assessment of the Bankable Feasibility Study.
Resource Expansion and Mine Life Context
The Colosseum Gold-REE Project currently hosts a JORC 2012-compliant Mineral Resource of
27.1Mt @ 1.26 g/t Au for 1.1Moz, of which over 67% is classiﬁed as Measured and Indicated. The
May 2025 Scoping Study outlined an open-pit operation with an initial mine life of approximately
8.5 years, generating an IRR of 61% at a gold price of US$2,900/oz.
The northeast extension drilling results reported herein and in previous announcements
demonstrate gold mineralization extending beyond the current mineral resource boundary. The
Company notes the intersected grades in the northeast extension area are higher than average
mineral resource grade in several instances and the system remains open.
In particular, the presence of high-grade zones within the broader mineralized envelopes (for
example, 55.2m @ 2.83 g/t Au within CM25-41) may present an opportunity for a follow-up
underground mining phase to selectively extract higher-grade material after completion of open-
pit operations, thereby potentially extending the productive life of the project.
The Company will continue to update the market as further results become available.
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:
X - @Dateline_DTR
Truth Social - @dateline_resources
LinkedIn - dateline-resources
YouTube - @dateline.resources
About Dateline Resources Limited
Dateline Resources Limited (ASX:DTR)(OTCQB:DTREF)(FSE:YE1) 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 also owns 100% of the high-grade Argos Strontium Project, also located in San
Bernardino 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