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Exploration Targets & Plan

The Arabian-Nubian Shield in Sudan and underlying the Nubian desert is one of Africa’s most prospective but least explored terrains. It has also seen a large-scale artisanal mining gold rush that clearly demonstrates the gold endowment of the region.

The regional setting of Block 14 is dominated by the Keraf Suture, a regional scale structural zone that hosts more than 8Moz in gold resources in addition to innumerable artisanal workings.

Exploration between 2013 and the completion of the Feasibility Study in late 2018 were largely focused on the Galat Sufar South (“GSS”) and Wadi Doum Resource areas with over 100,000m drilled with little drilling completed in the wider 1,000km2 Exploration Permit.

Exploration Programme map

The 2021 Exploration Programme in Block 14 announced in July 2021 is focused in two areas:

  1. Resource development at GSS where the high grade +2g/t core of the orebody is open at depth and on strike;
  2. The resumption of exploration throughout the exploration permit continuing evaluation of more than 300 artisanal workings and in the development of a structural model for mineralisation in the District.

The Eastern part of the Exploration Permit is dominated by the Eastern Gabgaba Shear Zone, an anastomosing system of reginal scale structures that has been traced over a strike length of 50km within a sequence of predominantly andesitic volcanics. Outside Wadi Doum, only two targets in this area have received any drilling:

Liseiwi Target

Drilling at the Liseiwi target located 20km north of the Wadi Doum resource area has intersected 10m at 15.32g/t, 8m at 12.18g/t, 9m at 9.84g/t and 24m grading 3.89g/t from several mineralised structures forming the basis for a large-scale artisanal working.

Mineralisation at Liseiwi is structurally controlled forming at or near to the contact between an andesite volcanic sequence and a Diorite intrusion. Gold mineralisation is hosted with intensely silicicified and sulphide rich andesite.

The high-grade nature of the mineralisation makes Liseiwi a priority target and a programme of detailed geological and structural mapping is mapping is planned.

EG2.2 Target

The EG2.2 Target is located 23km south-west of the Wadi Doum resource area and lies on the Eastern Gabgaba Shear Zone. andesites grading to microdiorite. 8 holes were drilled in 2016 with all 8 holes intersecting and returning best intercepts of 13m at 2.03g/t and 11m at 2.54g/t hosted in quartz-sericite-pyrite altered schist with minor quartz veining. Mineralisation hosted by a shallow dipping shear/thrust within a broader zone of carbonate altered, weakly to moderately sheared diorite and is present over a 2km strike length.

Planned exploration includes geological mapping and ground geophysics to map out the extent of mineralisation before a second programme of drilling. The Western portion of the Block 14 Exploration lies within the Keraf Suture and is characterised by shallow marine sediments and the Western Gabgaba Andesite domain which hosts the GSS Resource. Outside the GSS resource several areas have been targeted with initial drill programmes that now require follow up:

Area 3A

Area 3A is located 4km north of the planned process plant at GSS. Early drilling at this target in 2013 intersected up to 20m grading 9.90g/t, 7m at 3.18g/t and 5m at 8.61g/t in a quartz vein stock work within a north trending zone of quartz sericite pyrite schist. Since that time this area has been a focus of artisanal mining which has opened up new workings and a full re-evaluation of the prospect is now required.

Galat Sufar North (GSN)

4km north of GSS and the first discovery of significant mineralisation in Block 14 which led exploration southwards to the discovery of Galat Surfer South (GSN). Similar lithological setting to GSS with intense sericite alteration and hydrothermal carbonates often accounting for more than 50% of the rock mass. Mineralisation is associated with high grade discrete veins developed in carbonate altered schist.  Previously drilling intersected 3m at 15.89g/t and 7m at 8.55g/t. as with most of the older targets in Block 14 this area has been expanded by artisanal mining since the last exploration work and re-evaluation is needed prior to further drilling.

Galat Azurag

Galat Azurag located 15km south-east of Galat Sufar South. Drilling in 2014 intersected 22m at 0.98g/t, 7m at 2.98g/t and 8m at 5.33g/t. The geology is dominated by a shallow dipping, ductile thrust/shear which has been traced by mapping and artisanal workings over 8km at the contact between a carbonate sediment sequence and a diorite intrusive to the south.  The mineralisation is hosted with the sheared diorite. Given the extensive strike length defined, further exploration will target flexures on the main structure which have the potential to host significant mineralisation.

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