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    G Mining’s new Gurupi gold discovery: resource growth and pit design notes for engineers

    September 17, 2026|

    Reviewed by Tom Sullivan

    G Mining’s new Gurupi gold discovery: resource growth and pit design notes for engineers

    First reported on MINING.com

    30 Second Briefing

    G Mining Ventures has reported a new near-surface gold discovery at the Grodiocal target within its 2,100 sq. km Gurupi project in Maranhão, where maiden drilling of 17,667 metres in 127 holes has defined multiple mineralised zones along a 5 km by 1 km corridor on the Chega Tudo trend. Key intercepts include 23 metres grading 1.97 g/t gold from 51 metres at Grodiocal, 79.6 metres at 1.78 g/t from 146 metres at Blanket, and 48.4 metres at 1.32 g/t from 277 metres at Mandiocal. Gurupi currently hosts 1.83 Moz indicated and 0.77 Moz inferred, with an updated resource and PEA due by year-end and 65,000 metres of 2026 drilling planned.

    Technical Brief

    • Hole GUR-26-068 at Grodiocal includes 9 m at 4.24 g/t Au from 55 m depth.
    • Follow-up hole GUR-26-066 intersected 10 m at 3.42 g/t Au from 23 m downhole.
    • Grodiocal lies on the undrilled Chega Tudo trend, now tested by 17,667 m in 127 holes.
    • Gurupi drilling to date in 2026 totals ~33,600 m of a planned 65,000 m programme.
    • At Blanket, hole GUD-26-026 cut 79.6 m at 1.78 g/t Au from 146 m depth.
    • Blanket hole GUD-26-021 returned 63.5 m at 1.28 g/t Au from 170 m downhole.
    • Mandiocal hole GUD-26-028 intersected 48.4 m at 1.32 g/t Au from 277 m, including 5 m at 3.55 g/t.
    • Tocantinzinho deep hole BRZ-26-134 cut 7.8 m at 6.42 g/t Au within 51 m at 1.31 g/t from 382 m.
    • Additional Tocantinzinho hole BRZ-25-121 delivered 10.5 m at 4.62 g/t Au from 503 m depth.
    • Regional work at Tocantinzinho has outlined a 15 km by 3 km mineralised corridor hosting main and satellite targets.

    Our Take

    The Gurupi and Tocantinzinho gold results come as G Mining Ventures has already flagged higher 2026 total cash costs and AISC at Tocantinzinho, so additional near-mine ounces in the 1.3–1.9 g/t range could be important for offsetting margin pressure highlighted in the 13 Aug 2026 cost-guidance piece.

    La Mancha Resource Capital’s move earlier in 2026 to lift its stake in G Mining Ventures to 19.9% for the Tocantinzinho ramp-up suggests there is already institutional backing for district-scale growth in Pará, making the 80 km mineralised trend at Gurupi more likely to be funded and advanced aggressively if follow-up drilling holds up.

    Within our 1266 Mining stories, G Mining Ventures now appears frequently in both Brazil and Guyana coverage, and the combination of the Gurupi discovery with the Oko/Oko West consolidation in Guyana positions the company as a multi-jurisdictional gold district developer rather than a single-asset Brazilian producer.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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