Mantle Minerals Ltd. announced that the second phase of drilling at the Highway nickel deposit within the Pardoo nickel sulphide project has returned wide intercepts of up to 68m grading 0.44 % Ni and 0.1 % Cu. These intersections confirm the results from phase one drilling and position the company to prepare for a Minerals Resource Estimate under the JORC (2012) code in the first quarter of 2023. Best intercepts include: CPRC017 68m @ 0.44 % Ni from 57m; CPRC023 111m @ 0.37% Ni from 159m; CPRC018 81m @ 0.39 % Ni from 102m; CPRC028 24m @ 0.43 %Ni from 138m; CPRC033 24m @ 0.41 % Ni from 176m.

The mineralisation remains open both along strike and at depth. The Company previously announced completion of the 20-hole, 4157m Reverse Circulation (RC) drilling program at the Highway Deposit on 8th September 2022. This program was designed to infill existing drilling, increase the confidence in geological and grade continuity with the deposit, and to hopefully convert a substantial part of the mineralisation to JORC (2012) Indicated Resource status.

Next Steps: Mantle has completed geological modeling for the Highway deposit, including for the new drilling intersections here, and is already proceeding with a JORC (2012) Mineral Resource Estimate, which is to be completed by the end of First Quarter 2023. Furthermore, the Company is currently reinterpreting surface and down hole geophysics to target additional nickel sulphide mineralisation and hopefully higher grades along strike from the Highway deposit. Recent petrographic and lithogeochemistry work on thin sections and multi element assays suggest that the nickel sulphide mineralisation at Highway strongly correlates with the occurrence of magnetite and has a detectable magnetic signature.

This provides encouragement to follow up on existing magnetic anomalies within the Pardoo project as well as using existing down- hole electromagnetic data from Highway, to locate higher-grade nickel mineralisation along strike and at depth. The Pardoo Nickel Project comprises exploration tenements E45/5827 and E45/4671, about 120 kilometres East of Port Hedland, Western Australia. The Highway nickel copper sulphide deposit lies within the Pardoo shear on tenement E45/5827 and in 2010 was the subject of a non-JORC (2012) Inferred Resource estimate of 50mt @ 0.3% nickel and 0.13% copper (cut-off grade 0.1% Ni).

The Highway Nickel occurrence was first identified by CRA Exploration Pty Ltd. (CRAE, now Rio Tinto Ltd) in 1991 after highly anomalous values of nickel and copper mineralisation were confirmed from extensive regional scale exploration. Exploration tenement E45/4671 lies to the east of the Highway deposit and is highly prospective for strike extensions of the Highway deposit.