Highlights: 

  • AVZ holds 60% of the Manono Project, funding expenditure to completion of a feasibility study

  • Project covers about 188km2 in southern Democratic Republic of Congo (DRC)

  • Hosts lithium pegmatites with a strike length of 13km+

  • Outstanding results received from AVZ’s initial drilling program at Manono in 2017, including 235.0m @ 1.66% Li2O, 202.8m @ 1.57% Li2O and 250.9m @ 1.48% Li2O.

The Manono Project is owned by AVZ (60%), La Congolaise D’exploitation Miniere SA (30%) (Cominiere, a State-owned enterprise) and Dathomir Mining Resources SARL (10%) (Dathomir, a privately owned company). AVZ is responsible for funding expenditure to completion of a feasibility study.

Tenure, location and infrastructure

The Manono Project comprises PR13359, which covers approximately 188km2. The Manono Project is located approximately 500km due north of Lubumbashi in the south of the Democratic Republic of Congo (DRC) in central Africa. The project area can be accessed from Lubumbashi by a 1.5 hour flight or by road.

Infrastructure in Manono and the surrounding areas is limited. Power is currently generated at the Manono township using diesel generators and a recently commissioned solar power system. Dathomir has agreed to facilitate the rehabilitation of Piana Mwanga hydroelectric power station and the road from Lubumbashi to Manono.

There is an abundance of good water supply for both local consumption and any potential mining operation at Manono. Other consumables are bought locally and supplemented by goods brought in from Lubumbashi and Kalemie to the North.

 

Regional Geology

The Manono Project lays within the mid-Proterozoic Kibaran Belt, an intracratonic domain stretching for over 1,000km through Katanga and into southwest Uganda. The belt strikes predominantly SW-NE and is truncated by the N-S to NNW-SSE trending Western Rift system. The Kibaran is underlain in the east by Archaean rocks of the Tanzanian Craton and in the west and south by Lower Proterozoic metamorphic rocks.

The Kibaran belt comprises a sedimentary and volcanic sequence that has been folded, metamorphosed and intruded by at least three separate phases of granite. The latest granite phase (900 to 950MA) is assigned to the Katangan cycle and is associated with widespread vein and pegmatite mineralization containing tin, tungsten, tantalum, niobium, lithium and beryllium. Deposits of this type occur as clusters and are widespread throughout the Kibaran terrain. In the DRC, the Katanga Tin Belt stretches over 500km from near Kolwezi in the southwest to Kalemie in the northeast comprising numerous occurrences and deposits of which the Manono deposit is the largest known.

 

Historic activities

The historic Manono Mine was mined for its tin content between 1919 and 1982, during which time a total of 100Mm3 (million cubic metres) of ore were processed to produce 185,000 tonnes of cassiterite concentrate, sourced mainly from eluvial and weathered pegmatite from which was recovered an average of 1,850gm of cassiterite concentrate per cubic metre (g/m3) or approximately 1,330g/m3 tin.

With the exception of some exploration work carried out on the old mine dumps, aimed at determining cassiterite and spodumene grades, little prospection has taken place since 1960.3

 

Manono Mineralisation

The presence of lithium mineralisation in pegmatites at Manono has been confirmed to extend along strike of for more than 13km.

Two large areas of pegmatite have been identified, with the northeast area, referred to as the Manono sector and the southwest area, referred to as the Kitotolo sector. Mapping within the two sectors has established that there are many pegmatites, representing separate intrusions, including six large pegmatites.

The large pegmatites all contain spodumene mineralisation. The majority of the smaller pegmatites also contain spodumene and in some cases other lithium minerals. The two largest pegmatites (known as the Carriere de L’est Pegmatite and the Roche Dure Pegmatite) are each of similar size or larger than the famous Greenbushes Pegmatite in Western Australia.

In addition to geological mapping and trenching, AVZ has completed an initial phase of drilling, comprising seven diamond drill holes for a total of 1,739m and testing four of the large pegmatites. In all cases, thick intervals of pegmatite were intersected and spodumene was present within all the pegmatites. The drill results include: 

PegmatiteMain Pegmatite IntersectionDrill-hole ID
Roche Dure235.0m @ 1.66% Li2O, 1001ppm SnMO17DD001
Roche Dure202.8m @ 1.57% Li2O, 1078ppm SnMO17DD002
Mpete45.7m @ 1.59% Li2O, 1230ppm SnMO17DD005
Tempete65.9m @ 1.51% Li2OMO17DD006
Carriere De L’Est250.9m @ 1.48% Li2O, 913ppm SnMO17DD007

The Roche Dure Pegmatite has a proven length of at least 2,100m. Drill-holes MO17DD001 and MO17DD002 are centrally located within an 800m long interval in which the Roche Dure Pegmatite’s average true thickness is interpreted to be 200m and drilling has proven the pegmatite extends down-dip more than 250m and remains open. Secondary mineralisation in the form of tin and tantalum should not be discounted either.

The Mpete Pegmatite is estimated to have a strike length of 1km and the Tempete Pegmatite is estimated to have a strike length of 1.5kms. Both pegmatites are potentially large sources of lithium mineralisation within the Kitotolo sector.

The Carriere de L’Est Pegmatite, with a length of about 5,500m, is the largest pegmatite in the Manono Project. Assay results from drill-hole MO17DD007 confirmed the mineralisation distribution and tenor evident from the spodumene present in the drill-core. Sampling commenced at 1.9m from which depth the pegmatite is unweathered. The thickness of intersected pegmatite and the geometric relationship between the location of the drill hole and mapped pegmatite boundaries suggests the thickness of the pegmatite may be 280m.  

The initial drilling program has confirmed the immense size and potential of the Manono Lithium project.

Based on detailed prospect scale mapping, trenching and drill results and given the size and mineralised nature of the pegmatites at Manono, AVZ has generated an exploration target of between 1Bt to 1.2Bt of 1.25% to 1.5% Li2O for the entire Manono Project, including between 300 and 400Mt of 1.25% to 1.5% Li2O for the Roche Dure Pegmatite alone.

The potential quantity and grade of the exploration target as stated, is conceptual in nature as there has been insufficient exploration to estimate a Mineral Resource and it is uncertain if further exploration will result in the estimation of a Mineral Resource.

AVZ’s next phase of work which will focus on resource definition, extension drilling and initial mineralogical test-work.