Mt Ida Gold Resource Update & Proposed Demerger
Released
Released
Announcement PDF
ASX ANNOUNCEMENT
29 April 2025
Mt Ida Gold Resource Update & Proposed Demerger
Highlights:
•
Significant gold Mineral Resource Estimate (MRE) upgrade at the Mt Ida Project, with
Total Inferred and Indicated Mineral Resources of:
10.3Mt @ 3.33 g/t Au for 1.1Moz (at various cut-off grades see Table 1)
•
Upgrade represents a 46% increase in contained gold for the Mt Ida Project with updated MRE
prepared by external consultant Snowden Optiro
•
38% increase in the Baldock Resource to 7Mt @ 4.12 g/t Au for 930,000oz
•
Maiden MRE’s have been completed for the following prospects:
Bombay:
0.74Mt @ 1.4 g/t Au for 33,000oz
West Knell: 0.42Mt @ 2.9 g/t Au for 40,000oz
Jupiter:
0.14Mt @ 2.3 g/t Au for 11,000oz
•
Updated Kestrel MRE of 53,000oz @ 1.7 g/t Au
•
The Project now hosts 6 Resources offering several possible mining fronts to feed into a potential
future processing facility at Baldock
•
Significant upside for further resource growth with numerous regional targets and lodes open at
depth
•
Mining Approval granted for both Open Pit & Underground mining at Mt Ida and Works Approval
application submitted for a Processing Plant and Tailings Storage Facility
•
Demerger of Delta’s Mt Ida gold assets has commenced, into a separate vehicle Ballard Mining
Limited, which will seek admission to the ASX
Delta Lithium Limited (ASX: DLI) (“Delta” or the “Company”), is pleased to announce an update for the
ongoing activities at its 100% owned Mt Ida Project (“Mt Ida” or “the Project”) in the Eastern Goldfields
Province of Western Australia.
A Mineral Resource Estimate update has significantly increased the global gold inventory at Mt Ida,
demonstrating the presence of a large gold system, both at Baldock, and across the broader tenement
package and represents significant potential upside for future gold exploration at the Mt Ida Project (Figure
1).
Four of the six resources at the Mt Ida Project (comprising 93% of the total MRE) are located on granted
Mining Leases, with Mining Approval received on the Baldock resource, which hosts the majority of the
contained gold and will be the immediate target for a mining operation.
This is an excellent outcome for Delta and its shareholders, providing a solid foundation to further advance
the Mt Ida Gold project towards stand-alone production through a separate vehicle Ballard Mining Ltd
(“Ballard Mining”). This proposed demerger will preserve Delta’s balance sheet for lithium exploration and
development at the Yinnetharra and Mt Ida Projects, while the Company will maintain a substantial interest
in Ballard Mining and gold mining activities at Mt Ida.
ASX ANNOUNCEMENT
29 April 2025
Figure 1: Mt Ida Project Deposits and Regional Prospects
Given the scale of the Mt Ida Gold MRE, with the potential for a future standalone mining operation, and
the funding that will be required to continue advancing the Mt Ida Project towards execution, Delta has
decided to demerge the gold assets at Mt Ida into the Ballard Mining corporate structure, allowing Ballard
Mining to raise capital and apply for quotation on the ASX. Delta will remain as a lithium focused exploration
and development Company and maintain its balance sheet strength by retaining a significant shareholding
in this new pure gold company. If Ballard Mining is successfully admitted to ASX, Ballard Mining will use
the funds raised from its initial public offering to advance the Definitive Feasibility Study (‘DFS’) at Mt Ida,
complete infill and exploration drilling, with the aim of reaching a Final Investment Decision (‘FID’) for the
project.
Ballard Mining is named after Lake Ballard, a local landmark near the Mt Ida Project. Ballard Mining will
hold the gold asset at Mt Ida through its shareholding in Mt Ida AU Pty Ltd, which will be a wholly owned
subsidiary of Ballard Mining.
ASX ANNOUNCEMENT
29 April 2025
Delta has received in-principle advice from the ASX with respect to the demerger proposal and is preparing
a notice of meeting for Delta shareholders to approve the demerger and a prospectus for Ballard Mining to
raise funds for the initial public offer. Ballard Mining is targeting a listing in mid-2025, subject to market
conditions and the satisfaction of ASX listing requirements.
Further details regarding the demerger of Ballard Mining and its initial public offering will be provided in due
course.
Commenting on the results Managing Director, James Croser said;
“Delta has been diligently progressing the Mt Ida gold asset for the past 12 months and our geology team
has delivered a great result in increasing the gold resource to beyond 1Moz, with genuine standalone scale.
Mt Ida remains one of the very few, high-grade undeveloped gold projects in WA in excess of 1Moz.
“Strategically, the Baldock Area alone hosts 930koz, which presents as a single operation scenario across
multiple pits and underground lodes along the current 3km of strike. Additionally, the numerous regional
deposits at Mt Ida provide for potential supplementary production to support the base load mining scenario
at Baldock. Along with the advanced permitting status there is now a genuine pathway to production. The
new target for Mt Ida is to complete a large infill drill out at Baldock and continue with further exploration on
the wider tenure and seek to deliver DFS level confidence, which will ultimately support a final investment
decision.
“Now is the time for Delta to separate our commodities and crystalise the value we have created at Mt Ida.
The Delta board of directors has decided that the best way to deliver value for our shareholders is via a fit
for purpose gold vehicle with a new register of investors who wish to invest purely in an exciting
gold development story. Delta will retain a significant shareholding in the new gold company, Ballard Mining.
It is intended that current Delta shareholders will have the opportunity to participate in the initial public
offering of Ballard Mining via a priority offer and an in-specie distribution of shares in Ballard Mining, subject
to approval by Delta’s shareholders. Full details on the IPO structure and important information regarding
this process will be released to the market in due course.
“Importantly for Delta, we will retain a substantial shareholding in Ballard Mining on the balance sheet, which
provides continued exposure to the all-time high gold prices while focusing on developing its lithium projects.
Pursuant to a Mineral Rights Deed with Ballard Mining, Delta will maintain 100% ownership of all other
mineral rights besides the gold, including the current Lithium MRE at Mt Ida (see ASX 3 October 2023 ‘Mt Ida
Lithium Mineral Resource Estimate Update’) and will be able to leverage any potential shared capital
infrastructure, such as underground decline development and surface facilities.”
Mt Ida Gold Mineral Resource Update
Mt Ida is located 100km northwest of Menzies, and approximately 225km by road from Kalgoorlie in Western
Australia. The Mt Ida Project area resides on granted exploration & mining leases and while the Baldock
area is fully permitted for open pit and underground mining. As such, it can genuinely be considered as
‘shovel-ready’.
Delta is pleased to announce the updated Gold Mineral Resource Estimate at Mt Ida of:
10,340,000 tonnes @ 3.33 g/t Au for 1,102,000 ounces gold (see Table 1 for cut-offs)
Snowden Optiro completed the MRE update for gold at the Mt Ida Project in April 2025. The updated MRE
encapsulates the Baldock & Kestrel extensions as well as maiden resources for Jupiter, Bombay, and West
Knell. The Golden Vale MRE has not changed since Delta’s Maiden Gold MRE Announcement on 28th June
2024. All material information pertaining to this updated resource is to be found in Appendix 1 Material
Information Summaries.
ASX ANNOUNCEMENT
29 April 2025
Indicated
Cut off
Deposit
Open cut Au 0.5
g/t
0.0 g/t Au Cut off
Underground 1.5
g/t Au
All
Inferred
Total
Tonnes
Grade
Ounces
Tonnes
Grade
Ounces
Tonnes
Grade
Ounces
(000s)
g/t Au
(000s)
(000s)
g/t Au
(000s)
(000s)
g/t Au
(000s)
Baldock
2,600
4.5
365
1,620
3.6
200
4,120
4.2
563
Kestrel
-
-
-
940
1.6
48
940
1.6
48
Golden Vale *
-
-
-
496
1.7
27
496
1.7
27
Bombay
711
1.3
30
711
1.3
30
West Knell
238
3.3
25
238
3.3
25
Jupiter
50
1.7
3
50
1.7
3
Mt Ida Tailings *
-
-
-
500
0.5
8
500
0.5
8
Baldock
242
4.8
37
2,700
4.0
338
2,940
4.0
368
Kestrel
-
-
-
80
1.8
5
80
1.8
5
Golden Vale
-
-
-
-
-
-
-
-
-
Bombay
30
3
3
30
3
3
West Knell
192
2.4
15
192
2.4
15
Jupiter
90
2.7
8
90
2.7
8
4,220
3.9
532
7,000
4.1
930
1,000
1.7
53
1,000
1.7
53
496
1.7
27
496
1.7
27
Bombay
740
1.4
33
740
1.4
33
West Knell
420
2.9
40
420
2.9
40
Jupiter
140
2.3
11
140
2.3
11
Mt Ida Tailings *
500
0.5
8
500
0.5
8
Baldock
2,840
4.5
Kestrel
-
-
Golden Vale *
-
-
402
-
Total
2,840
4.5
402
7,500
3.0
699
10,340
3.33
Table 1: April 2025 Mt Ida Gold Mineral Resource Estimate Table (rounding errors may have occurred)
Note * indicates unchanged since previous release
1,102
The significant update to the MRE is the result of an additional 218 drillholes for 44,500m completed by
Delta subsequent to the previously announced Mt Ida Gold MRE on 28 June 2024. Material drill results
which have allowed the update to the MRE as well as historical intercepts have previously been released
to the ASX in the announcement on 26 March 2025 titled “Mt Ida Gold Exploration Results and Permitting
Update”.
Material drill results used in previous MRE updates have all been released to the ASX in the announcements
detailed in the Bibliography.
This updated Mineral Resource Estimate is a significant milestone for the Mt Ida Gold Project. Highlights
include:
•
46% Increase in total MRE from 752koz @ 3.5 g/t Au 1,102koz @ 3.3 g/t Au
•
38% Increase in contained gold for Baldock Deposit from 674koz @ 4.4 g/t Au 930koz @ 4.1
g/t Au
•
65% Increase in total Indicated Resources from 242koz @ 4.9 g/t Au 402koz @ 4.5 g/t Au
•
23% Increase in the MRE for the Kestrel Deposit from 43koz @ 1.6 g/t Au 53koz @ 1.7g/t Au
ASX ANNOUNCEMENT
29 April 2025
•
Maiden MRE at the West Knell deposit of 40koz @ 2.9 g/t Au
•
Maiden MRE at the Bombay Deposit of 33koz @ 1.4 g/t Au
•
No change to Golden Vale MRE of 27koz or the Mt Ida Tailings MRE of 8koz
Snowden Optiro reviewed the resource classification across the deposits, leading to an increase in Indicated
material at Baldock. All other resources remain Inferred which was the intention of the recent Stage 4 drilling
campaign. Material estimated on the first pass searching to the variogram range is considered for Indicated
classification. Pass 1 requires a minimum of 10 samples and a maximum of 24 to inform blocks. Pass 2
required fewer samples at the same search range, as resulting in an Inferred classification being applied.
A third pass typically one and half or twice the variogram range was undertaken, any material informed by
this pass was unclassified and has not been included in this reported MRE. These zones of Inferred and
Unclassified resources will be targeted in future drill programs to convert the resource classification.
Results from the MRE update indicate that Mt Ida has the potential scale to be a standalone project, with
further upside remaining to be tested. The Grade / Tonnage curve illustrated in Figure 2 across the updated
global resource reflects the quality of the Mt Ida Project. This provides an excellent foundation to build on
the existing work completed to date as Mt Ida progresses towards a production scenario.
Mt Ida Global MRE: Grade-Tonnage Curve
11,000,000
10.0
10,000,000
9.0
9,000,000
8.0
8,000,000
Tonnes
7,000,000
6.0
6,000,000
5.0
5,000,000
4.0
4,000,000
3.0
3,000,000
2.0
2,000,000
1.0
1,000,000
-
0
0.5
1
1.5
2
2.5
3
3.5
4
Cut-Off Grade (g/t)
MRE Tonnes
MRE Grade
Figure 2: Grade tonnage curve for April 2025 Global MRE Update
4.5
5
-
Au Grade (g/t)
7.0
ASX ANNOUNCEMENT
29 April 2025
Baldock Deposit
The Baldock deposit is a series of steeply west-south-west dipping gold lodes in the vicinity of the historic
Baldock and Timoni gold mines, located within Delta’s 100% owned Mt Ida Project. Gold mineralisation is
associated with quartz and sulphide development within distinct offset and en-echelon NW trending shear
zones. The MRE extends over 3km of strike, with the mineralised system identified over 4km of strike and
still open at depth and along strike (Figure 3).
Figure 3: Long Section showing Baldock MRE Growth and supporting intercepts
Baldock is proving to be an exciting deposit with further growth potential at depth and along strike to the
North of the recent 4-stage drilling campaign. In particular, the Baldock resource has seen a 38% increase
in contained gold after this MRE update, making it one of the highest-grade undeveloped gold projects in
Western Australia. Further evidence for the potential exploration upside at Baldock can be derived from the
Ounces Per Vertical Metre (OVM) chart in Figure 4 and the untested potential at Baldock below 300 metres
below surface (mbs) (RL 180 in Figure 4).
ASX ANNOUNCEMENT
29 April 2025
Baldock MRE - Ounces Per Vertical Metre
Ounces
RL
-
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
480
460
440
420
400
380
360
340
320
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
-20
OVM
Figure 4: Ounces Per Vertical Metre on the optimised Baldock MRE
The Baldock lodes are spatially related to the LCT pegmatites which have intruded into the package and
trend away to the Northwest. This is a unique geological setting in which both gold and lithium resources
can be mined separately while potentially using shared mine infrastructure (see Figure 5 illustration showing
conceptual mine shapes in relation to both lithium and gold MRE wireframes). During optimisation of the
gold resources for reporting no consideration was made with regard to the value of the pegmatites.
ASX ANNOUNCEMENT
29 April 2025
Figure 5: Isometric view showing both Lithium & Gold conceptual mine developments
Regional Resources
The completion of the Stage 4 drilling program has supported maiden MRE’s at Bombay, West Knell &
Jupiter while the Jupiter MRE has been included in the Baldock Block Model due to their spatial proximity.
These maiden MRE’s combined with the existing resources at Golden Vale and the update to Kestrel
illustrates the quality of the Mt Ida Project and the tenure. These MRE’s have the potential to act as satellite
ore sources feeding into Baldock in a mining scenario with many targets still to test (Figure 1).
The Bombay deposit is a series of shallow West dipping gold lodes that has seen some drilling in historic
programs with well-developed shafts present. Delta’s recent drilling correlates with historic intercepts and
extended domains both down-dip and along strike. Gold mineralisation is associated with minor sulphide
zones +/- quartz in an amphibolite unit, similar to the historic Timoni mine. The Bombay MRE extends over
800m of strike and is open at depth with the last intercept returning 3m @ 8g/t from 148m in BYRD027.
ASX ANNOUNCEMENT
29 April 2025
This whole trend from Baldock up to Bombay and further north is characterised by the same host rocks, a
number of historic workings and drill intercepts that Delta has yet to explore indicating significant exploration
upside (Figure 6). First-pass programs have been planned to test these priority targets.
Figure 6: Map showing Bombay & Jupiter resource with identified prospects and historic intercepts along the Baldock mineralised
trend which remains largely untested – Historical drill collar details can be found in Appendix 2
West Knell is located on the Eastern side of the Copperfield Granite, as a result the stratigraphy has been
overturned on this right limb causing the units to dip to the East, a mirror image of the Baldock and
associated lodes on the Western limb. The West Knell lodes are characterised by intense shearing and
often fuschite alteration +/- quartz with minor sulphide development. The Easterly dipping lode system at
West Knell has returned exceptional grades with 15–25 gram metres being consistently intercepted in
Delta’s drilling (See ASX Announcement ’Mt Ida Gold Project Exploration & Permitting Update on 26th March
2025). The main West Knell lode remains open at depth and will be tested by future programs.
Kestrel, although spatially close to West Knell is very different geologically. Kestrel mineralisation is hosted
in significantly silica altered north–south trending volcaniclastics and a discreet porphyritic intrusion. Kestrel
was initially drilled out in the 1980’s by a number of previous companies while Delta has just completed its
first drill program at the deposit. Initial results, reported in Appendix 2 confirm historic drilling and also
ASX ANNOUNCEMENT
29 April 2025
indicate the continuation of mineralisation at depth beyond the current MRE and along strike to the north.
A total of 39 holes remain in the laboratory at the time of this report, with 3,572 assays pending, which will
provide important assay data for future resource updates. Significant volumes of water were also
intercepted at Kestrel causing a number of holes to be abandoned, these will be diamond tail drilled in future
programs to test further depth extensions.
Both Kestrel and West Knell are currently open at depth, which will be the focus for resource growth
programs in the future. This Eastern limb is largely untested via modern exploration methods and is highly
prospective for resource growth and further discovery along these mineralised trends (Figure 7).
Figure 7: Plan View showing Eastern Resources and future exploration target areas – Historical drill collars and rock chip details
can be found in Appendix 2
The Stage 4 drilling program has been very successful with the delineation of three additional MRE’s and
the addition of 84koz to the Mt Ida Inventory. A number of additional regional gold prospects (Figure 1) have
been identified with minimal regional exploration work completed to date indicating the potential upside
across the Mt Ida Project.
ASX ANNOUNCEMENT
29 April 2025
Resource Conversion
The Company will now turn its focus towards the target of increased confidence in the MRE, in order to
derisk the Project, fully inform a DFS and advance the project towards a FID. An infill drill program of
85,000m at Baldock has been planned to build upon the Indicated category of the MRE which will allow
feasibility studies to be completed and the release of a maiden reserve statement.
This infill program will target the core resources in the immediate Baldock area, primarily Lodes 090 ,100,
110 & 140 which comprises 57% of the Baldock MRE (Figure 8). This program will aim to derisk the top
250m of the resource to allow mine optimisations and schedules to be completed to an appropriate degree
of confidence.
Figure 8: Baldock Long -Section showing phase 1 planned infill drilling program and updated MRE
The Baldock drillout is the logical progression in the growth of the Mt Ida Gold Project. Although a moderate
portion of the MRE lies within the Indicated category at Baldock (43%), this DFS level infill drill program will
aim to increase further confidence and maximise Indicated and Measured Resource ounces. This program
will also support the generation of a more accurate model as well as subsequent grade control models to
inform mine plans.
This is the right time for Ballard Mining to take control, prioritise funding of the DFS and associated
workflows and advance this exciting gold development story.
ASX ANNOUNCEMENT
29 April 2025
Next Steps
Delta aims to expedite the pathway to gold production at Mt Ida and realise maximum value for Delta’s Lithium
business. The Company aims to achieve this via the following steps:
•
Demerger of the Gold asset into a vehicle – Ballard Mining, which will seek admission to the ASX
•
Ballard Mining to complete an extensive infill drilling program to increase confidence in the existing
resource while converting additional resources to Indicated (to at least 250mbs at Baldock)
•
Commence process of converting Exploration Leases to Mining Leases for regional MRE’s
•
Finalise Metallurgical and Geotechnical studies to a DFS level
•
Release of a Maiden Ore Reserve Statement and Feasibility Study H1 CY2026
•
Systematically test the identified regional prospects with the intention to grow the Mt Ida Resource
base further
Delta and Ballard Mining are in an excellent position with 93% of Mineral Resources sitting on granted Mining
Leases, mining approvals received for both OP & UG mining at Baldock, and a works approval assessment for
a processing facility and TSF at Mt Ida is underway.
This places Delta and Ballard Mining in a strong position with a clear pathway to production in a buoyant gold
market.
Release authorised by the Board of Delta Lithium Limited.
For further information, please contact:
Delta Lithium
James Croser, Managing Director
Peter Gilford, CFO & Company Secretary
+61 8 6109 0104
info@deltalithium.com.au
Investor/Media Enquiries
Sodali & Co
Michael Weir +61 402 347 032
About Delta Lithium
Delta Lithium (ASX: DLI) is an exploration and development company focused on bringing high-quality, lithium-bearing pegmatite deposits, located
in Western Australia, into production. With current global JORC compliant resources of 36.5Mt@1.1%Li2O, strong balance sheet and an
experienced team driving the exploration and development workstreams, Delta Lithium is rapidly advancing its Projects.
The Mt Ida Project has coincident gold and lithium orebodies and holds a critical advantage over other developers with existing Mining Leases and
an approved Mining Proposal. Delta Lithium is pursuing a development pathway to unlock maximum value for shareholders. Deltas’ recent drilling
to extend the high-grade gold resources at Mt Ida has resulted in a significant increase in JORC compliant gold resources to 10.3Mt@3.33g/t for
1.1Moz Au.
Delta Lithium also holds the highly prospective Yinnetharra Lithium Project, with exciting lithium discoveries at the Malinda and Jamesons prospects.
The Company is currently conducting exploration activities at Yinnetharra with fieldwork commenced for 2025 across our large tenure package,
testing additional targets and building on the Maiden Resource at Malinda.
ASX ANNOUNCEMENT
29 April 2025
Competent Person's Statement
Information in this Announcement that relates to exploration results. the data and geological interpretation used as the basis of the Mineral
Resources is based upon work undertaken by Mr. Shane Murray, a Competent Person who is a Member of the Australasian Institute of Geoscientists
(AIG). Mr. Murray has sufficient experience that is relevant to the style of mineralisation 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 of Exploration
Results, Mineral Resources and Ore Reserves’ (JORC Code). Mr. Murray is an employee of Delta Lithium Limited and consents to the inclusion in
this announcement of the matters based on his information in the form and context in which it appears.
The information in this report which relates to Mineral Resources for the Baldock and Golden Vale gold deposits at the Mt Ida Gold/Lithium Project
was prepared by Michael Andrew an employee of Snowden Optiro. Mr Andrew is a Fellow of the Australasian Institute of Mining and Metallurgy
(Membership No. 111172) and has sufficient experience relevant to the style of mineralisation, the type of deposit under consideration and to the
activity undertaken to qualify as Competent Persons as defined in the 2012 edition of the ‘Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves’. Mr Andrew consents to the inclusion of the information in the release in the form and context in which it
appears.
Refer to www.deltalithium.com.au for past ASX announcements.
Past Exploration results and Mineral Resource Estimates reported in this announcement have been previously prepared and disclosed by Delta
Lithium in accordance with JORC 2012. The Company confirms that it is not aware of any new information or data that materially affects the
information included in these market announcements. The Company confirms that the form and content in which the Competent Person's findings
are presented here have not been materially modified from the original market announcement, and all material assumptions and technical
parameters underpinning Mineral Resource Estimates in the relevant market announcement continue to apply and have not materially changed.
Refer to www.deltalithium.com.au for details on past exploration results and Mineral Resource Estimates.
Disclaimer
This release may include forward-looking and aspirational statements. These statements are based on Delta Lithium management’s expectations
and beliefs concerning future events as of the time of the release of this announcement. Forward-looking and aspirational statements are necessarily
subject to risks, uncertainties and other factors, some of which are outside the control of Delta Lithium, which could cause actual results to differ
materially from such statements. Delta Lithium makes no undertaking to subsequently update or revise the forward looking or aspirational statements
made in this release to reflect events or circumstances after the date of this release, except as required by applicable laws and the ASX Listing
Refer to www.deltalithium.com.au for past ASX announcements.
Bibliography
Mt Ida Gold Exploration Results and Permitting Update ASX Announcement 26 March 2025
Mt Ida Exploration Update ASX Announcement 24 January 2025
Mt Ida Exploration Update ASX Announcement 14 November 2024
Delta Advances Mt Ida Gold Project ASX Announcement 27 August 2024
Mt Ida and Yinnetharra Exploration Update ASX Announcement 2 August 2024
Mt Ida Gold MRE Update ASX Announcement 28 June 2024
Yinnetharra & Mt Ida Exploration Update ASX Announcement 15 February 2024
Yinnetharra & Mt Ida Exploration Update ASX Announcement 10 November 2023
Mt Ida Lithium Mineral Resource Estimate Upgrade. ASX announcement 2 October 2023
Complementary High Grade Gold at Mt Ida. ASX announcement 4 September 2023
Drilling update for Mt Ida Lithium. ASX announcement 8 August 2023
Further Outstanding Gold Assays including 7m @ 15.3 g/t Au. ASX announcement 27 July 2022
Further Outstanding drill Assays inc. 5.6m @ 52.7 g/t Au. ASX announcement 27 June 2022
Mt Ida - A New Lithium Province (Historic results.) ASX announcement 28 September 2021
Mt Ida Acquisition, Capital Raise and Presentation. ASX announcement 7 September 2021
ASX ANNOUNCEMENT
29 April 2025
Appendix 1: Material Information Summaries Section 5.8 Geological Interpretation and Estimation
Parameters
The following is a material information summary relating to the Mineral Resource estimate, consistent with ASX Listing
Rule 5.8.1 requirements. Further details are provided in the JORC Code Table 1 (Appendix 3).
Location, geology and geological interpretation
Delta’s Mt Ida Lithium Project (Mt Ida or the Project) is located 220 km northwest of Kalgoorlie in the Eastern Goldfields
region of Western Australia. Project tenements are 100% owned by wholly owned subsidiaries of Delta Lithium Ltd
and cover approximately 170km2 of the Mt Ida-Ularring Greenstone Belt, with multiple granted prospecting,
exploration, and mining licences. The Mineral Resources are located within M29/002, M29/165, M29/094, M29/422 &
and E29/0640.
The Project is situated in the Archaean Mt Ida-Ularring Greenstone Belt within the Kalgoorlie Terrane of the Yilgarn
Craton. Gold mineralisation is hosted within discrete structures associated with major faults and silica and sulphide
alteration.
The area has undergone strong folding and deformation with two large anticlines present within the area; the Mt Ida
Anticline and the Kurrajong Anticline with major shear zones located between the anticlines and a noticeable absence
of a syncline. It is this complex structural history that, particularly along the Timoni trend that has resulted in the gold
endowment observed today.
Gold mineralisation has been identified in numerous prospects throughout the project area. The mineralisation is
hosted in lodes and exhibits the following characteristics:
•
•
•
•
•
Form in shear zones that dip steeply to the Southwest and associated flat south west dipping shear zones that
form between the steeper shear zones
Associated with quartz veining, silica alteration of country rock, sulphide development
Range in thickness from about 0.4 to 12 m
Gold as fine free gold coating sulphide species, dominantly pyrrhotite, chalcopyrite and pyrite
Gangue minerals for the gold lodes are mainly quartz chlorite, biotite, albite, hornblende
Mineralisation wireframes were interpreted using Leapfrog Geo 3D software, with graphical selection of intervals used
to form vein models of the mineralisation for all projects. Continuity and plunge orientations were established by
applying the structural measurements collected from oriented diamond core, surface mapping, regional interpretation
of the structural setting and exploratory data analysis. Weathering surfaces were interpreted using regolith logging
data.
Drilling techniques
The drilling database used to define the Mineral Resource comprises 2253 reverse circulation (RC) drillholes for a
total of 249,424.82m, 360 RC holes with diamond tails (RCD) for a total of 132,200.22m and 246 diamond holes (DD)
for a total of 42,926.32m. Aircore (AC), and rotary air-blast (RAB) drillholes were used to aid in geolo
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