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Source: https://www.datelineresources.com.au/wp-content/uploads/2026/02/2602-09-DTR-Geophysics-Survey_PR.pdf
Published: 2026-02-09T00:00:00+00:00
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Infill Geophysics Surveys Completed at Colosseum Project
Monday, 9 February 2026 08:00 AM
Topic: Company Update
SAN BERNARDINO, CA / ACCESS Newswire / February 9, 2026 / Dateline Resources
Limited (ASX:DTR)(OTCQB:DTREF)(FSE:YE1) (Dateline or the Company) is pleased to
announce the completion of infill gravity, magnetic and radiometric surveys at its 100%-
owned Colosseum Gold and Rare Earth Project in California, USA. This follows the
completion of an induced polarisation (IP) survey across the project in December 2025.
All newly acquired geophysical datasets are being integrated to progressively sharpen
drill targeting across the key structural corridors identified by earlier programs. This work
is expected to transition the Company from broad-based target definition to highly
focused drill testing. Diamond core drilling rigs are scheduled to begin arriving on site
next week.
Infill Geophysics Program – Scope and Completion
The infill program completed was comprised of:
• A high-resolution ground gravity survey consisting of 543 stations collected on a 100 m ×
100 m grid, providing detailed density coverage across the central project area.
• A magnetic and radiometric survey at 50m line spacing covering approximately 8.6 km²
delivering high-resolution magnetic and radiometric datasets.
The surveys were designed to improve resolution over areas where earlier IP and MT data
identified deep chargeability and conductivity features interpreted to be structurally controlled
and potentially associated with gold mineralisation and/or REE-bearing carbonatite intrusions.
Dateline’s Managing Director, Stephen Baghdadi, commented:
“The data continues to support the presence of a large mineral system, with deep structural and
sulphide-hosted features interpreted as mineralising plumbing extending beyond the known
near-surface ore zones. The integration of these high-quality geophysical datasets is a deliberate
step to sharpen drill targeting and maximise the effectiveness of the forthcoming drilling
campaign. With several targets interpreted at depths of approximately 500–1,000 metres, this
approach ensures that drilling is highly focused, technically informed and capital-efficient as the
Company advances into deeper, more technically demanding drill testing.”
Figure 1: Preliminary TMI Magnetics from the recently completed survey at Colosseum. The colours represent
variations in magnetic susceptibility within the shallow subsurface. Red and pink zones indicate magnetic highs
reflecting magnetite bearing intrusive rocks, altered breccia bodies. Blue zones indicate magnetic lows point to zones
of destruction or alteration of magnetite. Encouragingly, the magnetic data is aligned with the magneto-telluric and IP
surveys as disclosed to the market on January 27, 2026
Figure 2: Preliminary Bouguer Gravity from the recently completed survey at Colosseum. The red and pink zones
indicate higher density rocks, whilst the green and blues indicate lower density rocks (such as sediments). The strong
gravity high on the eastern side points to dense intrusive or altered bodies at depth (alkaline intrusive rocks, breccia
pipe roots, or carbonatite related material). There also appears to be a sharp N-S gravity gradient that aligns with the
Clark Mountain fault.
Figure 3: Preliminary Radiometrics (Total Count) from the recently completed survey at Colosseum. Dose rate
represents the combined gamma radiation from potassium, thorium, and uranium in the upper soil and rock profile.
Elevated total counts reflect enrichment in potassium, thorium, and uranium associated with alkaline intrusive rocks
and hydrothermal alteration, highlighting structural corridors and targets prospective for gold and rare earth
mineralisation.
Data Integration and Interpretation
The complete geophysical dataset, including the new infill gravity, magnetic and radiometric data
together with previously completed IP and MT surveys, is currently being reviewed and integrated
by Mitre Geophysics.
This integrated interpretation is focused on:
• Refining the geometry and continuity of the structures,
• Linking deep geophysical responses to mapped geology, structural features and
previously identified geochemical and alteration signatures; and
• Finalising priority drill targets where multiple geophysical datasets converge.
Drilling Update
As previously advised, diamond drill rigs remain scheduled to arrive on site next week. Drill
planning is progressing in parallel with the ongoing geophysical interpretation, with the objective
of testing the highest-priority targets identified from the integrated dataset.
Further updates will be provided as interpretation is finalised and drilling commences.
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