Announcement PDF ASX Release ASX:BUX & BUXO 16 June 2025 Fieldwork Commences at Centurion Buxton Resources Ltd (ASX: BUX & BUXO) (“Buxton” or “the Company”) is pleased to announce that earthworks have commenced for the maiden drilling program at the Centurion IOCG target (see Figures 1 & 2). Access to the Project, located in the underexplored West Arunta region of Western Australia, requires upgrading of existing access tracks along 55km of historic seismic survey lines, along with pad and sump preparation. These earthworks activities, which were delayed due to the recent significant and unseasonal winter rainfall event, are now expected to be completed within two weeks, allowing for mobilisation of the rig directly thereafter. Figure 1: Earthworks underway establishing access to the Centurion Project (14th June 2025, looking South). CEO, Marty Moloney, commented: "These are exciting times for Buxton shareholders as we stand on the threshold of our maiden drilling program at Centurion. I’d like to thank our key stakeholders from the Ngurra Kayanta and Parna Ngururrpa Aboriginal Corporations and also JB Contracting who are completing these site preparation works.” PO Box 661 Nedlands WA 6009 15 Robinson Av Belmont WA 6104 T: 08-9380 6063 E: info@buxtonresources.com.au W: www.buxtonresources.com.au View online: https://buxtonresources.com.au/link/4PKJ9r Figure 2: Centurion access works 14th June 2025, looking East. The Centurion Project targets a compelling, large-scale geophysical signature defined by semi-coincident magnetic and gravity anomalies - a characteristic often associated with major Iron Oxide Copper Gold deposits (see Figures 3 & 4). The planned initial 1,000metre vertical diamond drillhole (CN001DD) is designed to provide an initial test of this anomaly, with provisions for immediate follow-up "daughter" holes to more fully assess both the gravity and magnetic features from the parent hole. This approach optimizes the initial exploration phase and allows for rapid evaluation of the target. PO Box 661 Nedlands WA 6009 15 Robinson Av Belmont WA 6104 T: 08-9380 6063 E: info@buxtonresources.com.au W: www.buxtonresources.com.au View online: https://buxtonresources.com.au/link/4PKJ9r Figure 3: Centurion Project showing GSWA’s statewide magnetic imagery overlain with GSWA gravity contours along with the site of CRA’s VE001 which was abandoned before reaching basement. The semi-coincidence of magnetic and gravity anomalies is characteristic of IOCG systems such as Carrapateena and Olympic Dam. Buxton’s heritage clearances provide for multiple options for follow-up drilling in the case of encouragement from the first drilling program. PO Box 661 Nedlands WA 6009 15 Robinson Av Belmont WA 6104 T: 08-9380 6063 E: info@buxtonresources.com.au W: www.buxtonresources.com.au View online: https://buxtonresources.com.au/link/4PKJ9r Figure 4: Cross section looking northwest with historic CRA drillhole VE001 and planned drillhole CN001DD. Wireframes are the gravity (purple) and magnetic (pink) inversions. “Daughter” holes W1 & W2 illustrate how the planned drill site allows for immediate follow-up drill testing of both the gravity and magnetic features utilising the initial 1,000 metre “parent” vertical hole. ---o0o--This announcement is authorised by the Board of Buxton Resources Ltd. For further information, please contact: Martin Moloney Chief Executive Officer marty@buxtonresources.com.au PO Box 661 Nedlands WA 6009 15 Robinson Av Belmont WA 6104 T: 08-9380 6063 Sam Wright Company Secretary sam@buxtonresources.com.au E: info@buxtonresources.com.au W: www.buxtonresources.com.au View online: https://buxtonresources.com.au/link/4PKJ9r About the Centurion Project The Centurion Project consists of a single EL covering ~80 km2 located in the Great Sandy Desert between Kiwirrkurra and Balgo (Figure 5). The Centurion Project is situated in an excellent regional structural setting, close to a “triple junction” of GSWA’s “Major Crustal Boundaries”. The Project is focussed on a prominent dipolar and offset magnetic and gravity anomaly. This is characteristic geophysical pattern is associated with Iron Oxide Copper Gold (IOCG) deposits such as Olympic Dam, Prominent Hill and Carrapateena. The Centurion magnetic & gravity anomalies extend over 3,500 m by 5,000 m and have amplitudes of 1,500 nanoTeslas (magnetic) and 10.1 milligals (gravity). Analysis of magnetic data indicates that the target is located between 520 - 700 metres beneath ground level under sedimentary rocks of the Canning Basin. A previous drill test was attempted by CRA in 1993 who encountered drilling difficulties and terminated their diamond hole at 432.30 m having failed to reach basement. CRA’s geological logs (WAMEX A35274) noted chlorite-pyrite altered, boulder-sized clasts of felsic and mafic intrusives in a conglomerate assigned to the Permian Grant Formation toward the end of the hole. This observation provides strong encouragement that the geophysical response may be related to a hydrothermal system consistent with the IOCG model, and that the basement interface may not be far below the base of that hole. CRA’s drilling records also indicate that they drilled single shift and converted to diamond at just 198 m depth. Drilling risk can therefore be reduced through continuous drilling operations and using a deeper mud-rotary pre-collar. In November 2023, Buxton entered in Heritage Protection Agreements with the Ngurra Kayanta and Parna Ngururrpa Aboriginal Corporations, and a Heritage Survey was completed in July 2024. Provision for Buxton personnel and contractors to pass through lands of the Kiwirrkurra People is provided by a third access agreement. Buxton has also received permits from the Aboriginal Lands Trust to complete statutory requirements to access the Project. In May 2024, Buxton was awarded a WA Government Exploration Incentive Scheme grant to offset up to $220,000 of the cost of drilling the planned maiden drill hole at Centurion. PO Box 661 Nedlands WA 6009 15 Robinson Av Belmont WA 6104 T: 08-9380 6063 E: info@buxtonresources.com.au W: www.buxtonresources.com.au View online: https://buxtonresources.com.au/link/4PKJ9r Figure 5: Location of Buxton’s Centurion Project showing nearby projects Competent Persons Statement The information in this report that relates to Exploration Results is based on information compiled by Mr Martin Moloney. Mr. Moloney, (B. App Sc. Hons) is a Member of the Australian Institute of Geoscientists and Society of Economic Geologists. Mr Moloney is a full-time employee of Buxton Resources Ltd. Mr Moloney has sufficient experience which is relevant to the activity being undertaken to qualify as a “Competent Person” as defined in the 2012 edition of the Joint Ore Reserves Committee (JORC) Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Moloney consents to the inclusion in this report of the matters based on the information in the form and context in which it appears. Previously Reported Information There is information in this announcement relating to exploration results previously announced on: 1. 23rd May 2024 – Centurion Project (100% BUX) – Exploration Update 2. 10th October 2024 - Centurion Project, West Arunta (100% BUX) - Heritage Clearance Surveys Received Validity of Referenced Results Buxton confirms that it is not aware of any new information or data that materially affects the information from previous ASX Announcements which has been referenced in this Announcement. PO Box 661 Nedlands WA 6009 15 Robinson Av Belmont WA 6104 T: 08-9380 6063 E: info@buxtonresources.com.au W: www.buxtonresources.com.au View online: https://buxtonresources.com.au/link/4PKJ9r