Greenheart Gold starts first Tosso Creek drilling after 56m trench interval opens Suriname test

Greenheart Gold Inc. (TSXV: GHRT; OTCQX: GHRTF) has begun the first diamond drilling programme at its Tosso Creek gold project in Suriname, moving a property previously evaluated through soil sampling, trenching, mapping and geophysics into its first direct test of mineralization at depth. The initial 2,000-metre campaign has started at the Walaba target and will subsequently move to Swalanga, with drilling intended to determine structural controls, test continuity beneath surface mineralization and provide data for possible follow-up programmes.

The programme follows trench results that have defined broad mineralized intervals at Walaba, including 56 metres grading 0.97 grams per tonne of gold in one trench and 52 metres grading 0.77 grams per tonne in another. A separate trench returned 7 metres grading 4.57 grams per tonne, including 4 metres at 7.89 grams per tonne, indicating that narrower higher-grade zones may occur within or alongside the broader lower-grade mineralized system.

Those results make Tosso Creek worthy of drilling, but they do not yet establish a mineral resource or demonstrate an economic deposit. Surface trench widths do not automatically translate into mineable thicknesses at depth, and the current programme is specifically designed to determine whether the structures observed close to surface continue vertically and laterally.

What exactly is Greenheart Gold testing beneath the Walaba trenches?

Exploration to date has identified four principal target areas at Tosso Creek: Walaba, Swalanga, Maconia and Sevil. Greenheart Gold has combined soil geochemistry, trenching, geological mapping, LiDAR interpretation and drone magnetics to refine those targets, with Walaba selected as the starting point for the maiden drill campaign.

The wider project covers approximately 96 square kilometres in southern Suriname, about 180 kilometres south of Paramaribo. It lies within the Parakama Formation, a mineralized sequence of metavolcanic and metasedimentary rocks extending for more than 100 kilometres and hosting numerous artisanal mining areas. Greenheart Gold has said there is no record of previous modern hard-rock exploration at Tosso Creek aimed at identifying the bedrock source of historic alluvial and artisanal gold activity.

That gives the 2,000-metre programme a different risk profile from infill drilling at an established deposit. Rather than converting an existing resource into a higher-confidence category, Greenheart Gold is testing whether encouraging surface evidence can be developed into a coherent subsurface mineralized system.

Walaba is particularly important because trenching has returned both broad lower-grade intervals and narrower higher-grade zones. If drilling confirms that those zones persist at depth and can be linked structurally, the company would have a stronger basis for expanding the drill grid. If mineralization proves discontinuous or structurally complex, the current programme should also provide the geological information needed to redirect subsequent drilling.

How much financial capacity does Greenheart Gold have for exploration?

Greenheart Gold enters the Tosso Creek programme after completing a C$59.85 million non-brokered private placement in April. The company issued 59.85 million shares at C$1 each, with La Mancha Investments acquiring 35.5 million shares and increasing its ownership to 19.9%, while G Mining Ventures participated through its G Mining Guyana subsidiary.

The financing was earmarked for exploration across Greenheart Gold’s Suriname and Guyana portfolio, potential acquisitions in the Guiana Shield and general working capital rather than Tosso Creek alone. Even so, the capital raise materially changed the financial context around programmes such as the current 2,000-metre campaign because the company is no longer attempting to fund early-stage regional exploration from a minimal treasury.

Greenheart Gold is not yet the outright owner of Tosso Creek. The company entered an option agreement allowing it to acquire a 100% interest through required payments totalling US$675,000 over six years, with additional contingent consideration linked to completion of a feasibility study and potential future gold production.

That structure limits the upfront acquisition cost while allowing Greenheart Gold to determine whether the project justifies substantially greater exploration spending.

What would make the Tosso Creek drill programme materially important?

The first threshold is geological continuity. Greenheart Gold needs drilling to show that the broad gold-bearing zones exposed in trenches are not isolated surface features and that their geometry can eventually support systematic resource drilling.

Grade distribution is the second issue. A 56-metre surface interval averaging below 1 gram per tonne can be meaningful in the right geological and economic setting, while the 7-metre interval at 4.57 grams per tonne suggests possible higher-grade shoots. The relative frequency, orientation and continuity of those different styles of mineralization will matter much more than the strongest individual trench assay.

Tosso Creek also sits within a wider Greenheart Gold exploration strategy across the Guiana Shield. The company has already been drilling other Suriname projects including Majorodam and Igab, meaning management can compare exploration results and allocate capital toward targets generating the strongest evidence of scale and continuity.

For Tosso Creek, the August 20 milestone is therefore straightforward but important: the project has moved beyond surface targeting into the first test that can establish whether gold mineralization continues beneath the trenches. The 2,000 metres now being drilled are unlikely to define the final size of the opportunity, but they should determine whether Walaba and Swalanga warrant a substantially larger second campaign.