Brightstar Resources (ASX:BTR) Starts a 6,500m Deep Drilling Program Beneath the 1.45Moz Two Mile Hill Deposit

Sonal Goyal

28 October 2026 01:08 PM AEDT

Brightstar Resources (ASX:BTR) Starts a 6,500m Deep Drilling Program Beneath the 1.45Moz Two Mile Hill Deposit

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Key Highlights

The first of two diamond rigs has started a seven-hole program of about 6,500m beneath the Two Mile Hill-Shillington deposit.
The deposit carries a Mineral Resource of 24.6Mt @ 1.8g/t Au for 1.45Moz within the 3.6Moz Sandstone Gold Project.
Hole TMHDD26003 returned 305m @ 1.33g/t Au from 584m, including 173m @ 1.42g/t Au from 716m, below the current resource.
Assays for TMHDD26004, TMHDD26005 and TMHDD26006 are due in November.

Brightstar Resources Limited (ASX:BTR) has started the next phase of extensional diamond drilling at the Two Mile Hill-Shillington deposit, part of its 3.6Moz @ 1.4g/t Au Sandstone Gold Project in Western Australia. The first of two rigs is on site for a seven-hole program of about 6,500m, and the second is due within a week. The holes are aimed at the Shirvington Zone, a widened section of mineralised tonalite lying beneath the existing Mineral Resource of 24.6Mt @ 1.8g/t Au for 1.45Moz.

A Seven-Hole Program Beneath the Current Resource

The new program consists of seven deep diamond holes totalling roughly 6,500m, one of which is a re-entry of existing hole TMHRCD26020. Two rigs will share the work, and every collar sits on tenement M57/128. Planned depths for the six new holes range from 1,000m to 1,100m, while the re-entry carries a 250m extension to a total of 907m.

The design has several aims. Holes will extend the Shirvington Zone along strike to the south of TMHDD26003, which is the southernmost hole drilled so far. Others will test how continuous the mineralisation is at depth, define the western contact of the tonalite that the previous program did not reach, and extend TMHRCD26020 to intersect the eastern contact. The results are intended to supply geological, structural and grade-continuity data for the next Mineral Resource update and for mine planning.

Managing Director Alex Rovira said the September resource showed contained ounces per vertical metre rising materially because of the breadth of the Shirvington Zone at depth, and that the new program is meant to test continuity and define the edges of the host tonalite.

What the Earlier Holes Returned

The Shirvington Zone was first picked up by TMHRCD26020, which returned a bulk, unconstrained intercept of 305.4m @ 1.82g/t Au from 351.9m and finished in mineralised tonalite. A four-hole diamond program of about 3,800m completed in September 2026 then widened the known tonalite to more than 400m, with every hole ending in tonalite before reaching its western contact.

TMHDD26003, the southernmost of those holes, recorded 305m @ 1.33g/t Au from 584m, including 173m @ 1.42g/t Au from 716m. That interval lies below the depth at which contained ounces in the September 2026 resource estimate peak, at about 5,900oz per vertical metre roughly 595m below surface. Assays for TMHDD26004, TMHDD26005 and TMHDD26006, drilled to depths of 888.3m, 901.4m and 1,010.9m, are expected in November.

Geology and Resource Context at Two Mile Hill

The Two Mile Hill-Shillington deposit is built around a tonalite stock that has intruded a northeast-dipping package of basalt and banded iron formation. Most of the gold sits in the tonalite, with an intercept of 61.6m @ 1.81g/t Au in hole SN_TM_RD_22_0004 cited as an example. Mineralisation also occurs in the neighbouring basalt and banded iron formation, including 14.7m @ 24.3g/t Au from 250m in TRCD733.

The deposit's 24.6Mt resource comprises 10,413kt @ 1.6g/t Au for 526koz in the Indicated category and 14,179kt @ 2.0g/t Au for 920koz in the Inferred category. It forms part of the Sandstone resource of 79.4Mt @ 1.4g/t Au for 3.58Moz, which in turn sits within a group total of 5.2Moz after the 28 September 2026 update. Brightstar is also constructing a 1.5Mtpa processing plant for its Goldfields Project, where the January 2026 updated Feasibility Study set out production of more than 75,000oz a year over six years, with first gold targeted in the June 2027 quarter.

Where the Drilling Stands

Brightstar now has one rig turning at Two Mile Hill, a second arriving within days and three sets of deep-hole assays awaiting release. All results are scheduled to feed an updated Two Mile Hill Mineral Resource this quarter, the same period in which the company expects to deliver its Sandstone Pre-Feasibility Study.

FAQs

Q: How large is the new drilling program at Two Mile Hill?

A: It comprises seven deep diamond holes for about 6,500m, including one re-entry of TMHRCD26020. Two rigs will drill the program.

Q: What did hole TMHDD26003 intersect?

A: It returned 305m @ 1.33g/t Au from 584m, including 173m @ 1.42g/t Au from 716m. The interval lies beneath the current Mineral Resource.

Q: What is the current Two Mile Hill-Shillington resource?

A: The Mineral Resource is 24.6Mt @ 1.8g/t Au for 1.45Moz. It is part of the 3.6Moz Sandstone Gold Project.

Q: When are the pending assay results due?

A: Assays for TMHDD26004, TMHDD26005 and TMHDD26006 are due in November 2026. They will be incorporated into an updated Two Mile Hill resource.

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