# Marc Twining General Manager Exploration ## Career chronology - **Earlier career; exact dates not disclosed: Normandy Mining / Newmont** — Exploration geologist. [Barton Gold initiation report]() (Issuer biography or dated appointment record; see source notes) - **Earlier career; exact employers and dates not fully disclosed: Junior exploration companies** — Exploration Manager. [Barton Gold initiation report]() (Issuer biography or dated appointment record; see source notes) - **Prior to Barton; dates not disclosed: Geological Survey of South Australia** — Senior Principal Geoscientist. [Barton Gold initiation report]() (Issuer biography or dated appointment record; see source notes) - **Employee by 15 November 2021; current at roster date 2026-09-26: Barton Gold Holdings Limited** — General Manager Exploration. [Management and Technical Team]() (Management and Technical Team biography; current exploration leadership title); [Appointment of Chief Financial Officer]() (Competent Person table, printed p.2; Twining named as Barton employee for exploration results after 15 November 2021) - **Earlier career, before joining Rex Minerals in 2010; dates not disclosed: Iluka Resources Limited** — Exploration role; exact title not stated. [Rex Minerals Annual Report 2011]() (Rex Minerals FY2011 Annual Report; Twining biography, prior Iluka experience) ## Personal achievements ### Prior-employer biography credits Twining with exploration discoveries in South Australia [bgd_marc_iluka_success] Earlier career, before 2010 · issuer reported · low materiality Rex Minerals’ FY2011 annual report says that before joining Rex in 2010, Twining had worked at Normandy/Newmont and Iluka and had played a lead role in discovering several new deposits and advancing prospects in South Australia’s Eucla Basin. The biography names no deposits, reports no attributable resources or production, and is a prior-employer statement rather than independent technical verification. **Attribution:** Individual involvement documented. The prior-employer annual-report biography directly credits Twining with a lead discovery role, but does not quantify or identify the projects. **Relevance:** Relevant historical exploration experience for the current General Manager Exploration role; evidence is qualitative. [Rex Minerals Annual Report 2011]() (FY2011 Annual Report; Marc Twining biography, printed p.4) ## Contributions and company outcomes ### Tunkillia resource growth and Tolmer gold-silver discoveries [bgd_marc_success] FY2025 · issuer reported · medium materiality Barton’s 2025 annual report attributes resource growth at Tunkillia and dual high-grade gold/silver discoveries at Tolmer to company programs. Marc Twining held the exploration leadership role, but the report does not individually credit him for discovery decisions or assays. Results are exploration achievements rather than reserves or production. **Attribution:** Role overlaps event; causation unproven. Twining led exploration; individual technical authorship/responsibility is not established by the cited annual report. **Relevance:** Directly relevant to exploration leadership; geological results have not yet been translated into operating cash flow. [Annual Report 2025]() (Chair’s Letter, printed pp. 3–4; Directors’ Report, printed pp. 7–9); [Barton Gold initiation report]() (Company management biography, Marc Twining section); [Final Tunkillia Phase 2 assays]() (Issuer release dated 6 October 2026; Phase 2 final assays, update pending and PFS target) ## Suitability for the current role ### Role fit remains only partly evidenced [bgd_marc_twining_rolefit] Current appointment through 2026-10-09 · analyst inference · low materiality Issuer states BSc Geology (Honours), University of Adelaide; Graduate Certificate of Finance, Macquarie University; AusIMM, Australian Institute of Geoscientists and Society of Economic Geologists memberships. Institution/member-register confirmation was not completed. Role-fit inference: the documented background is relevant to the current role, but the evidence does not establish a full attributable performance record. **Attribution:** Responsibility not applicable. This is an analytical role-fit assessment; it does not allege responsibility for outcomes. **Relevance:** Relevant to current General Manager Exploration duties at Barton Gold Holdings Limited. [Management and Technical Team]() (Management and Technical Team biography, education and career credentials) ## Evidence gaps - Exact dates and independent corroboration for several prior-employer roles are not disclosed in the cited public biographies. - Degrees, professional memberships and licences are issuer-reported; direct awarding-institution and register verification was not completed. - The documented name/employer searches and reviewed filings are not exhaustive criminal, sanctions, litigation, safety, environmental or regulatory record checks; no clearance is implied. - Company exploration, finance and project milestones are not personally attributable absent the role limits stated in each finding. - The FY2026 annual report was announced as released on 29 September 2026, but the full report could not be retrieved and read by the cutoff; no claim is based on its contents. - No individual adverse finding was established in the documented searches; the open-web review is not an exhaustive criminal, sanctions, litigation, safety, environmental or regulatory check.