REG - Bradda Head Lithium - Whistlejacket: Review of Previous Results

Bradda Head LithiumAnnouncement

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RNS Number : 3899Z  Bradda Head Lithium Ltd  07 April 2026

 

7 April 2026

Bradda Head Lithium Ltd

("Bradda", "BHL" or the "Company")

Whistlejacket Lithium: Technical Review of Previous Exploration Results

Bradda Head Lithium Ltd (AIM: BHLL), the North America-focused lithium
development group, is pleased to provide details on exploration activities
undertaken by Kennecott Exploration Company ("KEX") at the Whistlejacket
Lithium Project in Arizona (the 'Whistlejacket Property') between 2022 and
2023. This summary is provided following the announcement of a definitive
Option to Joint Venture agreement (the "Agreement") with KEX (See PR
01/27/2026 and 17/02/2026). At that time, the Company published a CPR on the
Whistlejacket Property which is available on the Company's website; the
information in this announcement includes the information contained in the CPR
along with a more detailed summary & explanation of drill holes assays
results, discussion about the exploration potential, future exploration plans
along with a summary of the Company's existing San Domingo project.

The Agreement provides BHL the right to earn-in and acquire 51% of the
Whistlejacket Property by spending a minimum of US $5.5 million in Phase 1,
with the option to earn-in and acquire an additional 9% by spending a further
US $12 million in Phase 2.

Exploration activities previously undertaken by KEX, including two phases of
diamond core drilling for a total of 4,188 meters, confirmed the presence of
high-quality lithium-cesium-tantalum ("LCT") pegmatites across approximately
4,486 acres of the Whistlejacket Project area in northwestern Arizona.

Drill hole intercepts and project highlights are:

·    51 meters at 1.11% Li₂O in hole WSTL0009, followed by 10.74 meters
at 0.97% Li₂O;

·    19.47 meters at 1.66% Li₂O in hole WSTL0008, followed by 13.56
meters at 1.31% Li₂O;

·    Additional high-grade intercepts were also recorded such as 5.51
meters at 2.04% Li₂O in WSTL0001, 2.55 meters at 1.74% Li₂O in WSTL0005,
4.00m at 1.39% Li₂O in WSTL0006, 4.00m at 1.01% Li₂O in WSTL0013, 3.93
meters at 1.06% Li₂O in WSTL0017, and 8.59m at 0.91% Li₂O in WSTL0018 (See
table 1 below for details);

·    103 surface samples returned lithium grades ranging from 0.50% to
4.91% Li₂O;

·    100% Arizona State Lands, exploration and drilling permits are
quickly being acquired for surface sampling, drill site building, and new
roads, if needed;

·    Excellent infrastructure access with existing roads, located
approximately 1.8 km from a paved highway and 1.5km to the town of Bagdad,
Arizona;

·    Strike length of 2.2km of lithium mineralized pegmatite swarm exposed
on the surface;

·    More than 37% of mapped pegmatites contain visible spodumene
mineralization

Two and potentially three sub-horizontal pegmatite bodies with geometry and
orientation comparable to the sub-horizontal pegmatites reported at Piedmont
(USA) and Sigma (Brazil).

Ian Stalker, Executive Chair, commented:

"The drilling, surface sampling, and mineralogical work completed to date
confirm Whistlejacket as a coherent, multi-phase LCT pegmatite system
dominated by spodumene mineralization. The combination of broad mineralized
intervals, a large number of higher-grade intercepts, low iron content, and
encouraging Dense Media Separation (DMS) characteristics highlight the
project's potential for both bulk-tonnage development and the production of a
clean spodumene concentrate. The Project fits exceptionally well into our
portfolio, as it is strategically located only 80km from our San Domingo
pegmatite project and 11km from our Basin lithium-in-clay project,
entertaining possible synergies between both as we grow these projects
collectively.

We have a diversified, U.S.-focused lithium portfolio, uniquely spanning
hard-rock pegmatites, sedimentary clays in Arizona; and brine assets in
Nevada, Texas and Pennsylvania, all of which are Tier-1 jurisdictions. Our
flagship San Domingo project shows strong grades, shallow mineralization, and
positive metallurgy, while the Basin Clay Project already hosts a large 43-101
compliant resource with significant expansion upside. The portfolio is
strategically positioned to benefit from U.S. government support for critical
minerals, fast-tracked permitting, and rapidly growing EV and energy-storage
demand. Backed by a committed, equity-aligned management team and strong
infrastructure access, Bradda Head is well placed to advance toward long-term
value creation."

Previous Exploration at Whistlejacket Project

KEX conducted extensive rock chip sampling across the broader land package
followed by airborne magnetics/radiometrics, obtained land satellite coverage,
and completed two phases of diamond core drilling for a total of 4,188 meters.
The drilling targeted several different pegmatite bodies, encountering notable
intervals such as 51.0 meters of 1.11% Li(2)0 in drill hole WSTL0009. All
drill holes encountered lithium-bearing pegmatites with a minimum intercept of
1.05 meters at 0.51% Li(2)0, indicating the presence of a broadly distributed
LCT pegmatite system.

BHL reviewed all drill hole and surface data prior to making an offer to enter
into negotiations for acquisition. Bradda Head has not yet examined the drill
core currently stored in a KEX warehouse in Salt Lake City, UT. The core will
be examined during technical site visits later this year.

 

 

Table 1.- Drill hole assay summary

Geologically at Whistlejacket, the pegmatites intrude and cross-cut mafic to
intermediate metavolcanic rocks of the 1.74Ga (billion year old) Bridle
Formation which are predominantly oriented along a southwest-northeast (SW-NE)
strike, with subordinate east-west (E-W) and north-south (N-S) orientations.
Pegmatite dips range from sub-horizontal to sub-vertical, with the
sub-vertical pegmatites hosting the best mineralized intervals identified to
date. Mineralization occurs in swarms and clusters, seven of which have been
tested to date by drilling and/or surface sampling.

A total of 408 surface rock samples were collected during systematic
geological mapping, with 203 samples identifying spodumene as the dominant
lithium-bearing mineral. These spodumene-bearing pegmatites are distributed
across a prospective area measuring approximately 2.6 km in length by 2.2 km
in width, with significant portions of the project area remaining to be
evaluated through future exploration. Hyperspectral imaging was utilized to
assist in target identification and returned encouraging results.

KEX implemented a comprehensive quality assurance and quality control
("QA/QC") program, including the insertion of certified reference materials,
blanks, and field and laboratory duplicates.

Review of the core photos reveal KEX collected ultraviolet light photographs.
Higher-grade, coarse-grained spodumene typically fluoresces red-orange under
UV light, while lower-grade, finer-grained, quartz-rich spodumene exhibits
yellow-green fluorescence (Figure 3).

An independent mineralogical study conducted by RTX (RTX Mineralogy and Early
Metallurgy Team, Bundoora) was implemented on core samples and early-stage
geometallurgical assessment indicates that lithium mineralization at
Whistlejacket is dominantly hosted in spodumene within LCT-style pegmatites,
with low iron content and favorable liberation characteristics. Results from
six drill holes demonstrate high lithium deportment to spodumene and
encouraging potential for DMS (Dense Media Separation), supporting the
project's potential to produce a clean spodumene concentrate and informing
future metallurgical testwork.

Next steps

Future exploration is expected to focus on additional surface mapping, chip
and channel sampling to identify and refine pegmatite targets. This will be
supported by detailed structural analysis and follow-up drilling to generate
sufficient data to support the preparation of a maiden Mineral Resource
estimate. Additional mineralogical and metallurgical testwork is also
recommended to further evaluate the potential for DMS processing of the
spodumene mineralization.

In accordance with the terms of the Option to Joint Venture agreement, the
Company has proposed an initial-year exploration budget designed to advance
and expand the mineralized prospects identified to date, supporting systematic
project de-risking and continued progression of the Whistlejacket Project.

Figure 1 - Location Map

Figure 2 - Geology - Drillhole Location - Sample Location - Targets

Figure 3 - UV Fluorescence of Spodumene Pegmatites

 

 

Qualified Person (Bradda Head)

Joey Wilkins, B.Sc., P.Geo., is an external consultant and the Qualified
Person who reviewed and approved the technical disclosures in this news
release. Mr Wilkins is a graduate of the University of Arizona with
a B.Sc. in Geology with more than 39 years of experience in mineral
exploration and is a qualified person under the AIM Rules and a Qualified
Person as defined under NI-43-101. Mr Wilkins consents to the inclusion of
the technical information in this release and context in which it appears.

THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF THE MARKET
ABUSE REGULATION (EU No. 596/2014) AS IT FORMS PART OF UK DOMESTIC LAW BY
VIRTUE OF THE EUROPEAN UNION (WITHDRAWAL) ACT 2018. UPON THE PUBLICATION OF
THIS ANNOUNCEMENT VIA A REGULATORY INFORMATION SERVICE, THIS INSIDE
INFORMATION IS NOW CONSIDERED TO BE IN THE PUBLIC DOMAIN AND SUCH PERSONS
SHALL THEREFORE CEASE TO BE IN POSSESSION OF INSIDE INFORMATION.

 

For further information please visit the Company's
website: www.braddaheadltd.com (http://www.braddaheadltd.com/) .

 

ENDS

 Contact:

 

 Bradda Head Lithium Limited                       Shard Capital

                                Beaumont Cornish                                  Tavistock

 Company                        Nomad              Broker                         Investor Relations
 Ian Stalker, Executive Chair   James Biddle /     Damon Heath / Isabella Pierre  Nick Elwes /

 Denham Eke, Finance Director   Roland Cornish                                    Josephine Clerkin
 +44 1624 639 396               +44 20 7628 3396   +44 207 186 9927               + 44 20 7920 3150

                                                                                  braddahead@tavistock.co.uk

 

 

About Bradda Head Lithium Ltd.

Bradda Head Lithium Ltd. is a North America-focused lithium development
group. The Company currently has interests in a variety of projects, the most
advanced of which are in Central and Western Arizona: The Basin
Project (Basin East Project and Basin West Project) and the San Domingo
Project.

The Basin East Project has a Measured Mineral Resource of 20 Mt at an
average grade of 929 ppm Li for a total of 99 kt LCE and an Indicated
Mineral Resource of 122 Mt at an average grade of 860 ppm Li and an
Inferred Mineral Resource of 499 Mt at an average grade of 810 ppm Li for a
total of 2.81 Mt LCE
(https://www.accesswire.com/883697/bradda-head-lithium-ltd-announces-updated-mineral-resource-expansion-basin-project).
A plan of operation was approved by BLM in 2025 for the Basin West area. Now
company is working in a Environmental Assessment (EA) permit.

The San Domingo Project comprises 248 claims covering approximately 1850
acres, located primarily on BLM land, along with two Arizona State Land
Department claims. To date, 108 drill holes totaling 13,089 m of core drilling
have been completed across three drilling campaigns. The project area hosts
more than 1,000 mapped pegmatites, of which 18 have been identified as
priority targets, with six tested by drilling. The area currently holds two
active Notices of Intent (NOI) permits, and updated drilling plans are in
place that can be implemented once all required permits for the pegmatite
targets are secured. The objective of the next exploration phase is to further
delineate the most prospective areas and advance them toward potential Mineral
Resource Estimation (MRE) and NI 43-101 compliant reporting.

The Group intends to continue to develop its three phase one projects
in Arizona, whilst endeavoring to unlock value at its other prospective
pegmatite and brine assets in Arizona, Nevada, and Pennsylvania

 

Technical Glossary

 Term                                         Technical Definition
 Assay                                        A laboratory analytical procedure used to determine the concentration of a
                                              specific element or mineral within a rock, soil, or drill sample. Assay
                                              results are typically reported in weight percent (%) or parts per million
                                              (ppm).
 Certified Reference Material (CRM)           A standard sample with known concentrations of specific elements used as part
                                              of QA/QC procedures to monitor laboratory accuracy and analytical performance.
 Chip Sampling                                A sampling technique in which small fragments of rock are systematically
                                              collected along an outcrop or exposure to obtain a representative sample for
                                              geochemical analysis.
 Competent Person's Report (CPR)              A technical report prepared by a qualified professional (Competent Person)
                                              summarizing geological, exploration, and resource information in accordance
                                              with JORC or equivalent reporting standards.
 Dense Media Separation (DMS)                 A mineral processing technique that separates minerals based on density
                                              differences using a dense suspension medium, commonly applied in spodumene
                                              processing to pre-concentrate lithium-bearing minerals.
 Diamond Core Drilling                        A drilling method that uses a diamond-impregnated drill bit to recover
                                              cylindrical rock core samples, enabling direct observation of geology,
                                              structure, and mineralization.
 Drill Hole Intercept                         A reported interval of mineralization encountered within a drill hole,
                                              expressed as length and grade (e.g., meters at % Li₂O). Intercepts represent
                                              downhole lengths and may not represent true thickness.
 Earn-In Agreement                            A contractual arrangement in which a company acquires an ownership interest in
                                              a mineral property by funding exploration or development expenditures over a
                                              defined period.
 Geological Mapping                           The systematic documentation and interpretation of rock types, structures, and
                                              mineralization exposed at surface or underground to support exploration
                                              targeting.
 Geometallurgy                                The integration of geological and metallurgical information to understand how
                                              mineralogical characteristics influence processing performance and metal
                                              recovery.
 Hyperspectral Imaging                        A remote sensing technique that records spectral reflectance data across
                                              multiple wavelengths to identify minerals and alteration patterns associated
                                              with mineralization.
 Lithium Oxide (Li₂O)                         The conventional unit used to report lithium grades in hard-rock lithium
                                              deposits, representing the lithium concentration expressed as lithium oxide
                                              equivalent.
 LCT Pegmatite                                A class of granitic pegmatites enriched in lithium, cesium, and tantalum,
                                              commonly hosting lithium minerals such as spodumene, petalite, and lepidolite.
 Maiden Mineral Resource Estimate             The first formal estimate of the quantity and grade of a mineral deposit
                                              prepared in accordance with recognized reporting codes such as JORC or NI
                                              43-101.
 Metallurgical Testwork                       Laboratory or pilot-scale testing conducted to evaluate ore processing
                                              characteristics and determine potential recovery methods for valuable
                                              minerals.
 Mineral Resource                             A concentration or occurrence of material of economic interest in the Earth's
                                              crust with reasonable prospects for eventual economic extraction, classified
                                              as Inferred, Indicated, or Measured under JORC/NI 43-101.
 Mineralogical Study                          Analytical work that determines the mineral composition, texture, and
                                              distribution of minerals within a rock sample, often used to understand metal
                                              deportment and processing behavior.
 Option to Joint Venture Agreement            A commercial agreement whereby a company may earn an ownership interest in a
                                              mineral property through staged exploration expenditures, with the potential
                                              to establish a joint venture.
 Pegmatite                                    An extremely coarse-grained igneous rock, typically granitic in composition,
                                              which may host economically significant concentrations of rare metals
                                              including lithium, cesium, and tantalum.
 Pegmatite Swarm                              A geological assemblage consisting of multiple pegmatite bodies occurring
                                              within a defined structural or lithological corridor.
 QA/QC (Quality Assurance / Quality Control)  Standard procedures implemented during exploration sampling and analytical
                                              programs to ensure the accuracy, precision, and reliability of data, typically
                                              involving standards, blanks, and duplicates.
 Rock Chip Sample                             A sample collected from exposed bedrock during surface exploration, typically
                                              used for geochemical analysis to evaluate mineralization potential.
 Spodumene                                    A lithium-bearing pyroxene mineral (LiAlSi₂O₆) commonly found in LCT
                                              pegmatites and the primary source of lithium in hard-rock lithium deposits.
 Strike Length                                The horizontal extent of a geological feature or mineralized zone measured
                                              along its orientation on the Earth's surface.
 True Thickness                               The actual thickness of a geological unit or mineralized body measured
                                              perpendicular to its orientation, which may differ from the downhole intercept
                                              reported in drill results.
 Ultraviolet Fluorescence                     A mineralogical property whereby certain minerals emit visible light under
                                              ultraviolet radiation, commonly used to visually identify spodumene in drill
                                              core.

 

 

 

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