Sukumaland Greenstone Belt · Tanzania

Nine shear zones,
one staged programme.

The Isonda Gold Project sits on the same folded-BIF architecture that hosts Geita and Nyanzaga. We're funding the surface mapping, sampling and geophysics SRK Exploration needs to de-risk the Rank 1 zones before any drilling decision.

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Peak assay
14.95 g/t Au

License footprint
3.41 km²

Core log key

Banded iron fm.

Chert ridge

Volcaniclastic tuff

Shear / gouge

Au-bearing vein

100%

Licence Held, JV Partnership

Ranked Shear Zones

14.95 g/t

Peak Gold Assay

Samples >1 g/t Au

Geochemical Footprint

What's already at surface.

Fire assay results from selective rock-chip sampling, verified against SGS Mwanza lab certificates, returned 14 samples above 1 g/t Au. The five highest are logged here.

ISOG-104

14.95 g/t

ISOG-092

9.25 g/t

Grab sample

8.05 g/t

ISOG-100

7.72 g/t

ISOG-102

6.31 g/t

Ranked Shear Zones

Nine structures. Six carry Rank 1 priority.

SRK Exploration mapped nine main shear zones and ranked each by combined shearing intensity, alteration, arsenic response and radiometric signature.

          Rank 1
          Rank 2
          Rank 3
        

R1

Zones G, K, L, M, N & P
Strongest combination of shearing, hematite/limonite and sericite/kaolinite alteration, elevated arsenic, and high-intensity radiometric potassic response.
R2

Zone S
High-intensity potassic response and elevated soil arsenic, within the same structural corridor as the Rank 1 zones.
R3

Zones O, R & Q
No clear radiometric association yet — flagged for revisiting once the Rank 1 and 2 zones are better constrained.
Au

Pathfinder correlation
Within mineralised shears, gold shows a strong positive correlation with arsenic, cadmium and yttrium. Gridded soil surveys show silver anomalies coincide with the same structures.

Complementary Dataset

A 2024 DDIP survey found five chargeability anomalies in the same corridor.

Libra Geophysics' Dipole-Dipole IP survey independently mapped five targets, T1 through T5, folded and widening at fault intersections below 20 m depth. T4 sits closest to the artisanal workings that returned the rock-chip grades above. SRK's independent review found the case for drilling any of them premature ahead of surface confirmation — the phase-one programme is what determines which, if any, get drilled.

Location & Regional Setting

70 to 220 kilometres from three producing districts.

Isonda sits in the outer arc of the Sukumaland Greenstone Belt, the same belt hosting Geita, Bulyanhulu and Nyanzaga.

Map of the Sukumaland Greenstone Belt showing the Isonda Gold Project relative to the Geita, Bulyanhulu and Nyanzaga gold projects in northern Tanzania

Fig. — Major gold projects of the Sukumaland Greenstone Belt, northern Tanzania.

Prospecting Licence PL 11679/2021, Nyangw'ale District, Geita Region — granted 20 Aug 2021, current to 19 Aug 2028.

Nearest town

Geita, ~67 km NW

Nearest city

Mwanza, ~137 km NNE

Elevation

1,200–1,420 m a.s.l.

Access

Sealed road to Nyang'wale, dirt road on

Nearest airport

Mwanza International

Licence size

3.41 km², 100% held

Structural Setting

Bedrock built like the region's biggest mines.

Isonda sits within the highly structural outer arc of the Sukumaland Greenstone Belt. The bedrock framework is dominated by interlayered Banded Iron Formation, chemical chert ridges, and volcaniclastic tuffs, cut by northwest–southeast regional ductile shear zones.

SRK Exploration's technical review classifies regional Sukumaland gold deposits into two structural families: folded BIF units — the style at Geita and Nyanzaga, and Isonda's own host rock — and quartz veins within shear zones, the style at Bulyanhulu. SRK considers Isonda's deposit model robust enough to justify a focused, staged exploration programme, while noting the project remains greenfield stage with no guarantee of an economic discovery.

Geita · folded BIF

Nyanzaga · folded BIF

Golden Ridge · folded BIF

Tulawaka · folded BIF

Bulyanhulu · shear-hosted vein

BIF
Banded Iron Formation — the dominant host lithology, iron-oxide banding interlayered with chert.
TUF
Volcaniclastic tuffs bound the sequence, marking the outer-arc volcanic contribution.
SHR
Regional NW–SE ductile shear zones provided the fluid pathways that concentrated gold at structural intersections.

Phase One Program

De-risking the Rank 1 zones before any drill bit turns.

SRK Exploration's own review calls immediate drilling premature. Capital raised funds the surface programme that has to happen first — the sequence below, run end to end by SRK.

Surface exposure & mapping

Hand/mechanical stripping over Rank 1 and 2 zones to expose the full shear corridor, with detailed lithological and structural mapping.

Channel sampling & assay

Systematic channel sampling across every exposed shear, fire-assayed at an accredited lab, with pXRF arsenic screening in the field.

Ground geophysics

High-resolution radiometric and magnetic survey over the Rank 1/2 corridor to refine shear positions ahead of any drill planning.

Targeted drilling, if warranted

Oriented diamond drilling of confirmed ore shoots — contingent on positive surface results — as the basis for any future resource estimate.

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Reach out and a member of the Isonda team will follow up with the details relevant to your interest.

This page summarises early-stage exploration results for information purposes only. Mineral exploration is speculative: assay results, geophysical targets and stated grades are indicative of sampled material only and do not guarantee the presence of an economic gold deposit. No mineral resource or reserve has been estimated for this project. Statements about future drilling, resource estimation, or partner engagements are forward-looking and subject to change. This material is not an offer to sell, or a solicitation of an offer to buy, any security, and is not investment, legal, or financial advice.

Nine shear zones,one staged programme.