San Domingo Pegmatite Project
Overview
San Domingo is a lithium pegmatite project located in the Maricopa and Yavapai counties, Arizona the property consisting of 32.6 square kilometers. It was historically mined for lithium in the 1940’s and 50’s. Access to the project locations is via a dirt road 7 miles from Arizona Highway 74 that connects Wickenburg and Phoenix.


Project Highlights
A maiden drill programme commenced at our pegmatite asset during July 2022, resulting ina total of 7,316m in 47 core holes completed. Lithium bearing minerals (spodumene and minor lepidolite) were identified in c.60% of the 2022 total holes completed.
A follow-up program commenced in the late summer of 2023 commenced with a focus on following-up the 2022 results, expansion on several shallow high-grade lithium intercepts and testing several new targets. The second phase culminated in an additional 5,776 meters of core and an additional 61 holes for an overall total of 13,092 meters of core drilling across the property.
The Company also completed an extensive soil sampling programme across the majority of the 32.6km2 landholding, north-south oriented sample lines spaced 100m apart with samples spaced 50m, delivering very promising results highlighting priority targets along the 10.5km mineralised trend. Alongside of soil sample results, Bradda’s geologists, followed-up the GPR geophysical survey work carried out in 2021/2022 with structural and outcrop mapping programme to guide drill hole targeting. The GPR results, essentially detects resistive anomalies in the subsurface, were followed up by geologic mapping campaigns and for coincident soil anomalies to determine if pegmatites are potentially hidden below greenstone host rocks. Further geologic mapping has focused on pegmatite zoning, characteristics, size (width and length), and structural integrity for drill targeting.
2022 drill programme
The maiden drill program from 2022 drill tested a number of pegmatites from Midnight Owl to Jumbo, finding spectacular intercepts such as 31.85m at 1.60% Li2O in hole SD-DH22-024 and 9.54m at 1.85% Li2O, both at shallow depths of 26.82m and 46.24m respectively. All holes were drilled on BLM lands on targets with several holes placed proximal to historic lithium bearing prospects. A summary list of drill hole intercepts from both programs is listed below.
As follow-up to this drilling, core samples (1/4 core) from several holes at Jumbo were sent off for metallurgical studies at SGS Laboratories, finding a 1.03% Li2O bulk sample crushed to 1/4” (minus 0.85mm) makes a 6.0% Li2O concentrate, using DMS (Dense Media Separation).
2023 drill programme
A follow-up drill programme commenced during August 2023, with highlights including 7.28m at 1.27% Li2O at White Ridge, 8.99m at 1.20% Li2O and 4.14m at 2.07% Li2O at Morning Star. The exploration programme targeted new areas discovered through the soil sampling program, targets such as Bolt in the northeastern section of the project. Additional targets were identified, but were not drill tested during this programme but are slated for future campaigns.


2024 Channel Sampling
Bradda Head conducted a channel sampling program in early 2024 focusing efforts on fresh exposures at Morning Star, and historic open mine cuts at South Morning Star, White Ridge, and Midnight Owl. The channels at White Ridge encountered 5.00 meters at 2.33% Li2O and 4.10m at 2.81% Li2O while a fresh drill site exposure at Morning Star contains 5.30m at 1.25% Li2O. The channel sampling at Midnight Owl detected 2.90m at 2.31% Li2O. The White Ridge results reveal significant potential there where the pegmatite is untested to the its north.

Assay highlights from the two phases of drill hole results include:
Assay highlights from the two phases of drill hole results include:
2023 drill programme
A follow-up drill programme commenced during August 2023, with highlights including:
- Preliminary core drilling was conducted at Midnight Owl, Bolt, and Lone Giant in the northern part of San Domingo, amounting to 1,877m in 22 shallow core holes
- This programme is follow-up core drilling to Midnight Owl’s previous programme that encountered 31.85m @ 1.60% Li2O in hole SD-DH22-024 at a depth of 26.82m
- Drill hole SD-DH23-049 at the Midnight Owl target discovered a new zone deeper than found in hole 24:
- 6.35m containing 0.83% Li2O at 87.33m depth
- 3.05m of 1.03% Li2O at 98.60m depth
- Drill holes at White Ridge in the Central area returned 7.28m at 1.27% Li2O, including 92ppm Ta2O5 in hole SD-DG23-069 and 5.18m of 0.88% Li2O in SD-DH23-072
- The Morning Star drilling, southwest of Jumbo and White Ridge, found encouraging and shallow high-grade lithium and tantalum.
- Drill hole SD-DH23-088 encountered 2.28m of 0.41% Li2O with 620 Ta2O5, followed by an intercept of 2.90m at 0.49% Li2O and 872 Ta2O5 starting at a depth of 39.26m.
- Drill hole SD-DH23-091 intercepted 2.01m at 1.84% Li2O and SD-DH23-093 identified 8.99m at 1.20% Li2O at 31.39m depth followed by 4.18m at 1.63% Li2O from 51.66m.
- Additionally, hole SD-DH23-104 found 4.14m at 2.07% Li2O at 54.56m followed by 4.57m at 1.12% Li2O.
- Drill holes at the new Bolt target, located 800m east of Midnight Owl include:
- 5.27m at 0.51% Li2O within a broader interval of 24.65m carrying 0.24% Li2O in SD-DH23-057
- 5.87m containing 0.48% Li2O contained within 11.8m of 0.32% Li2O in SD-DH23-059
- Core holes at Bolt have detected anomalous levels of tantalum with intervals coincident to the lithium intercepts
Metallurgical Test Work
Preliminary Metallurgical test work on Phase I core from the Jumbo Target contain positive results, described in the November 20, 2023 PR:
- Three composite samples were selected for test-work, representing the low grade, medium grade and high-grade environment reflected in the maiden 2022/2023 exploration programme previously reported from drilling undertaken at the Jumbo Target in the San Domingo Pegmatite district in Arizona.
- After discussion with SGS Canada, an initial HLS test was undertaken to evaluate the potential for dense media separation (“DMS”) to produce a sellable Li-oxide concentrate product. This test work is predominantly preliminary in its approach. The measured head grade of the samples were 3.05% Li2O, 1.03% Li2O and 0.34% Li2O, reflecting the high, medium and low-grade range seen in our drilling results to date.
- Despite the preliminary nature of this test-work programme, it was highly encouraging to see the medium-grade sample produce an ‘in spec’ lithium oxide concentrate product with a 6.0% Li2O grade and an interpolated recovery of contained lithium to the concentrate of 50.3%, at a ¼” size crush size. Tailings rejection was considered efficient in this scenario with the rejection of 60.6% mass and a loss of only 2.1% lithium.
- Alternately, at a crush size of 3/8” (9.5 mm), a concentrate was produced with a grade of 5.5 % Li2O at a 55.5% recovery of contained lithium oxide. This is still considered in spec in the current market. ‘In spec’ Li concentrates currently sells in the Lithium-Oxide Spot Market for circa US$2,100/ tonne.
- Using the medium-grade sample, the flotation feed, a combination of middling product from the HLS testing at a crush size of ¼” and under sized fraction (minus 0.85 mm), recorded an upgraded value of 1.57% Li2O with Li distribution of 47.0% and a mass distribution of 30.5%.
- At our request, SGS Canada also undertook Tescan Integrated Mineral Analyzer analysis of the medium grade sample, finding a dominance of spodumene as the primary lithium mineral with possible, but very minor petalite and eucryptite, along with muscovite, minor beryl, tourmaline, calcite, and apatite. The overall iron content is low, <1.0%, indicative of a very good concentrate product.
- Bradda is currently undertaking a second drilling programme at its San Domingo Pegmatite District with approximately 75% of the programme being complete. Assay results to date were released on November 12 2023, highlighted by drill hole SD-DH23-049 which contains 6.35m @ 0.83% Li2O followed by 3.05m @ 1.03% Li2O, with more results arriving in the near future.
- Metallurgical test work is now currently on hold whilst Bradda collects more representative samples from this next phase of drilling to undertake a more detailed test work programme.

Next Steps
A Phase III drilling programme is under development and designed to test new areas, such as the Dragon targets, holes to be drilled at Thunder and Lone Giant where lithium-bearing pegmatites have not been drill-tested. All three areas contain spodumene in pegmatite and excellent surface samples to support drilling. Permitting is underway with the BLM on all three targets in addition to new potential drill sites at Midnight Owl, Jumbo, White Ridge, and Morning Star.
Bradda will continue exploration at San Domingo as the targets remain compelling and open for mineralized expansion. The targets at Dragon reveal coarse grained (>1m) spodumene crystals in historic mines and offer excellent opportunity to test with shallow drill holes along 400 to 600m strike lengths of pegmatites.

Our Projects
Arizona
Sedimentary projects:
Basin and Wikieup Sedimentary Lithium projects
Our Projects
Arizona
Pegmatite projects:
San Domingo Lithium Pegmatite district
Our Projects
Nevada
Brine projects:
Wilson and Eureka Lithium Brine projects


