Tanzanian HMS Projects
- Strandline holds 2,000km2 of highly-prospective tenure along the coast of Tanzania
- Strategically positioned within one of the world’s major zircon and titanium producing corridors (see Figure 1)
- Over 40% of global mineral sands production is from Africa
- Strandline has a product quality advantage with high-value zircon, rutile and ilmenite deposits
- Tanzania is a mature mining jurisdiction, strong regulatory system, with existing coastal infrastructure to support mine development and mineral exports
Figure 1: Map of Africa showing major mineral sands deposit locations
Strandline has recognised that there is a large gap in HMS resources between the countries of Mozambique and Kenya where several large to very large mines and resources have been previously discovered and developed. Strandline was first to move and pegged what it considered to be the best mineral sands ground in Tanzania close to infrastructure.
The Company, through rapid systematic exploration, has been hugely successful in discovering multiple major mineral deposits, that are at various stages of project development, including:
- Fungoni Project: 25km south-east of Dar es Salaam with DFS completed and ready for development
- Tanga South Project” comprising the Tajiri JORC resources and prospective Pangani tenements, 40km south of the Tanga port in Northern Tanzania, undergoing scoping level assessment
- Bagamoyo Project, 40km north of Dar es Salaam, where a large-scale discovery shows significant resource potential from surface
- Sudi Project, in southern Tanzanian 30km from the port of Mtwara, in JV with Rio Tinto, where mineral sands intersection of 30 meters thick provide a strong target for resource growth
Figure 2: Strandline holds a dominant tenure position down the coastline of Tanzania. Including 268Mt Resource @ 3.3% THM at Tajiri Project. Tajiri project hosts 8.8Mt of contained heavy mineral, underpinning Strandline’s outstanding long-term production outlook.
With the 2015 acquisition of Jacana Resources, Strandline controls a highly prospective exploration tenure position along the coast of Tanzania, within a major world class mineral sands corridor (see Figure 2). These projects are surrounded by some of the world’s major world-class mineral sands mines, located in neighbouring Kenya, Mozambique, Madagascar and South Africa (see Figure 1).
- A series of 100% held projects spread along 350km of the Tanzanian coastline
- Exclusive access to only detailed country-wide mineral sands database & specialist team
- Focus on High Value Mineral Assemblages – proven through drilling of key projects to date
- Rapid, low cost delineation of JORC resources – two high grade Resources already delineated at Fungoni and Tajiri prospects
- Major infrastructure advantage with Key Projects close to infrastructure hubs of port and power
- Envious position for majors wanting entry into the last underexplored piece of southeast African coastline assemblages (Ilmenite, Rutile, Zircon) close to infrastructure that have potential to be rapidly brought into production.
TANGA SOUTH PROJECT:
TAJIRI PROSPECT – delineated mineral resources to develop a step-change project in Tanzania
- With 8.8Mt of contained heavy mineral, Tajiri underpins Strandline’s outstanding long-term production outlook in Tanzania
- Tajiri JORC-compliant Mineral Resource Estimate increases to 268Mt @ 3.3% Total Heavy Minerals (THM), up +80% from 147Mt at 3.1% THM released to ASX on 9 July 2019
- All Tajiri resources start from surface, with no overburden and contain large coherent high-grade domains comprising mostly high-value titanium-dominated mineral assemblage
- Contained Heavy Mineral (HM) content rises to 8.8Mt, up from 4.6Mt, with in-situ rutile (580,000t), zircon (335,000t), ilmenite (5,206,000t) and almandine garnet (1,477,000t)
- Tajiri project is likely to continue to grow over time with high grade resources remaining open
- Outstanding result significantly enhances the strategic value of Strandline’s mineral sands portfolio, with Tajiri advancing strongly behind the Company’s construction ready projects – the Fungoni project in Tanzania and Coburn project in Western Australia
- In light of this substantial Tajiri Resource, Strandline has initiated strategic project reviews and partnering discussions in order to advance feasibility evaluation and project permitting activities
- Strandline is ideally placed to capitalise on the growing demand for new mineral sands supplies, with debt funding now secured for the Fungoni project, Tajiri confirmed as a world-scale deposit and Coburn established as a technically and economically robust Australian project.
- The new Resource of 268Mt at 3.3% THM (from 147Mt @ 3.1%THM), with contained HM of 8.8Mt (up from 4.6Mt, see ASX announcement dated 18 February 2019 and 28 March 2019), confirms Tajiri as a world-scale deposit which will underpin Strandline’s strong production outlook in Tanzania for many years.
- The outstanding result also means that Tajiri now has the geological critical mass, robustness and market appeal to advance project feasibility, development approvals/permitting and partnering activities.
- The northern tip of the Tajiri Mineral Resource is situated just 35km south of the established Tanga port facilities - refer Figures 1 and 2.
- The Tajiri resources have been defined through a series of air core drilling campaigns. All resources start from surface, with no overburden and contain large coherent higher-grade domains comprising mostly high-value titanium-dominated mineral assemblage, with elevated zones of zircon and almandine garnet. Furthermore, several resources remain open along or across strike providing significant opportunities to grow resources further over time.
- The Tajiri resource upgrade significantly enhances the strategic value of Strandline’s mineral sands portfolio and further strengthens the economic outlook for the project.
- Tajiri comprises a world-scale series of coherent high-grade titanium-dominated deposits which all start from surface and are situated favourably to the existing infrastructure at Tanga.
- The last phase of drilling has also confirmed large upside to resources with several deposits remaining open, as well as Strandline recently acquiring new prospective tenure along strike to the south of Tajiri.
- Tajiri’s valuable mineral mix and scalability provides Strandline with a range of development pathways and options for project feasibility, which are now under strategic review.
- Overall the Company is ideally placed to capitalise on the growing demand for new mineral sands supplies, with debt funding now secured for the Fungoni project, Tajiri confirmed as a world-scale deposit, and Coburn established as a technically and economically robust Australian project.
Figure 1 Strandline suite of tenements in Tanzania, with the northern projects, including Tajiri, situated in proximity to Tanga infrastructure (plan view)
Figure 2 Tajiri Project Mineral Resources, showing a series of high value deposits from surface (plan view)
FUNGONI PROJECT – Poised for development
The Fungoni DFS confirms the project will deliver strong financial returns, has a high unit value product suite, is capital-efficient and demonstrates the strategic potential of the Company’s portfolio of mineral sands assets in Tanzania.
The project is favourably located ~25km from the Dar es Salaam port in a growing commercial/industrial district and will benefit from existing infrastructure in the region.
Following an extensive due diligence process, Nedbank CIB has obtained credit approval to underwrite Fungoni’s debt funding:
- Nedbank CIB has signed a Credit-Approved Term Sheet to underwrite a US$26 million Project Finance Facility (the “Facility”) to part fund the development of the Fungoni Project in Tanzania
- Fungoni has an estimated capital cost of US$35 million (excluding financing costs), meaning the Facility will meet most of the project’s capital requirement
- The Facility contains standard commercial terms which the Company considers favourable
- Fungoni is a highly robust project that is projected to generate strong financial returns for Strandline based on low capital and operating costs and a high-value product suite
- Nedbank CIB has extensive experience in mining project financing in Africa
- On 1 November 2018, an updated DFS was released to ASX which resulted in significant increases in forecast project financial returns and reduced implementation risk:
- Project pre-tax NPV10 of US$48.7m (A$64.9m at USD:AUD 0.75, up from US$42.9m)
- Project post-tax NPV8 of US$34.8m (A$46.4m) and NPV10 of US$30.8m (A$41.1m)
- Project pre-tax IRR of 61% (up from 56%) and project post-tax IRR of 42%
- Project-only cashflows would support a payback period from first production of 1.7 years
- Life-of-Mine (LOM) Revenue of US$184m (up from US$168m)
- LOM EBITDA of US$115m (up from US$98m)
- Binding offtake agreements secured covering 100% of Fungoni production and revenue
- Fixed-price EPC contract awarded; equivalent development capital US$32m (up from US$30m) (excluding applicable taxes and levies)
- Key highlights of the Fungoni DFS include (Refer to the ASX Announcement dated 06 October 2017 for full details of the material assumptions underpinning the production target and financial results for the Fungoni Project):
- High Grade Mineral Resource: Measured and Indicated – 22Mt @ 2.8% THM
- Maiden ore reserve of 12.3 Mt @ 3.9% Total Heavy Mineral (THM), with opportunities to grow reserves and mine life, further increasing financial returns
- Ore Reserve underpins an initial 6.2 years of operations at a planned 2Mtpa mining rate
- Orebody at surface, free-dig unconsolidated sands well suited to conventional open pit dry mining using excavator and truck; resulting in low operating costs
- Environmental Certificate and Mining Licence Application granted. The Tanzanian Government’s decision also paves the way for Strandline to advance its other Tanzanian mineral sands projects, which are globally-significant in scale and valuable mineral
- Nominal 12 month design, construction and commissioning period and 2.7 year payback period from start of construction
- Modular relocatable infrastructure with state-of-the-art processing technology which can be re-used at Strandline’s other mineral sands assets in Tanzania
- “Low impact” mining philosophy with progressive backfill and rehabilitation of the mined area; returning the land to pre-mining state.
Figure 1 Fungoni deposit location map
Figure 2 Preliminary 3D image of Fungoni Project (Feasibility level design)
BAGAMOYO PROJECT – Strong drilling results highlight growing potential of Bagamoyo mineral sands project
- Bagamoyo is emerging as a significant new Tanzanian mineral sands province following strong assays from maiden auger drilling program
- Auger holes completed over soil, radiometric and topographic anomalies confirm a series of higher grade zones from surface; Remaining open at depth
- More outstanding assays with high grades of zircon and titanium from the Bagamoyo Project in central Tanzania , see ASX release dated 17 September 2018.
- Assay results, which come from air core (AC) and infill auger drilling, confirm extensive high-grade mineralisation from surface, with thickness of 3m to 10.5m
- Significant drill results include:
- 7m @ 5.6% total heavy mineral (THM) and 18% slimes from surface (Auger)
- 5m @ 5.6% THM and 8% slimes from surface (Auger)
- 7m @ 4.7% THM and 10% slimes from surface – ended in mineralisation (Auger)
- 10.5m @ 4.4% THM and 9% slimes from surface (AC)
- 7.5m @ 3.9% THM and 20% slimes from surface (AC)
- Mineral assemblage test work from composite samples confirm a high unit-value assemblage for the upper zone of BG-2, averaging 8.2% zircon, 5.7% rutile, 0.5% leucoxene and 67% Ilmenite
- The BG-2 anomaly has received relatively wide spaced AC drilling along its 4.5km length, and remains open across and along the strike, which confirms the potential scale of the system. The drilling of additional auger holes into the BG-4 anomaly has established the potential for north-west trending high-grade strands parallel to the current coast.
- In light of these results, the Company has estimated an Exploration Target comprising 78 to 156Mt at 3% to 4.5% THM. A further drill program is required to test the veracity of the Exploration Target
- The Company believes the Bagamoyo area is highly prospective and represents a significant new mineral sands province in Tanzania.
- Bagamoyo is on track to be one of four major mineral sands projects we aim to evaluate and potentially develop in Tanzania over time.
Summary of Drill Results
Strandline’s 100%-owned Bagamoyo tenements are located approximately 40km north of Dar es Salaam and close to the proposed Bagamoyo port development in Tanzania. The Company completed the AC and Auger drill programs in early in 2018 and recently received the final laboratory assay analysis data relating to THM, mineral assemblage and chemistry testwork.
The shallow auger drill program was completed across BG-2 and BG-4 using ~50m drill centres along variably spaced drill lines which confirmed the cross-strike continuity of the high-grade zones.
The 19 hole, 373 drill metre AC program was designed to test the thickness of mineralisation across the large BG-2 anomaly. The program identified higher-grade zones ranging from 3m to 10.5m thick from surface, with a cross-strike width ranging between 100 to 250m, which is encouraging. The BG-2 drill holes were planned on an irregular pattern with wide spaced drill lines varying between from 400 to 800m apart and 200m spaced holes along the 4,500m long BG-2 mineralised trend. No AC was completed at BG-4.
The AC drill program also confirms broad, high background heavy mineral content averaging approximately 1.5% THM that contains several high-grade strandlines with THM grades ranging between 4% and 6% THM.
Mineral assemblage data has been received from 15 heavy mineral concentrate composites selected across geologic domains from the auger and AC drill programs The result show a high-value average assemblage, comprising 6.4% zircon, 4.6% rutile, 0.7% leucoxene and 60% Ilmenite with combined rutile and zircon of 11.1%.
The mineral assemblage from across all of the zones and grade ranges at BG-2 comprises 7.4% zircon, 5.2% rutile, 0.5% leucoxene and 63% ilmenite. Five representative upper zone from BG-2 have a combined zircon-rutile content of 14.4% comprising 8.2% zircon and 5.7% rutile with a total VHM of 82%. The mineral assemblage from BG-4 comprises 5.5% zircon, 3.9% rutile, 0.8% leucoxene and 57% ilmenite across a range of THM grades.
Figure 1 Bagamoyo Project anomalies with significant THM intersects from BG-2 and 4 showing the AC (black boxes and text) and Auger drill holes (blue holes and text) significant results.
BAGAMOYO MAIDEN EXPLORATION TARGET
With the completion of the auger and AC drilling program, the Company has been able to estimate a maiden Exploration Target for the anomalies at Bagamoyo. The Exploration Target is an estimate of potential heavy mineral sands tonnage where there has been insufficient exploration for Mineral Resource Estimation.
The Company has now defined an Exploration Target of 78 to 156Mt at 3% to 4.5% THM.
The Exploration Target has been determined based on the following:
- AC and auger drill database for width, depth and grade ranges at a number of localities along and adjacent to the main anomalies;
- Topographic features using a detailed digital terrain model generated from the detailed (100m flight line and 30m sensor height) aeromagnetic survey; and
- Geological model with the recent drilling showing grade and geological continuity.
The following assumptions have been used to estimate the Exploration Target:
- Bulk density value of 1.8g/cm³ has been used for the Exploration Target;
- The width of mineralisation is based on drilling across the BG-2 and BG-4 anomalies and is considered conservative with exploration drilling indicating the mineralisation has not been closed off;
- Grade ranges used for the Exploration Target are based on the averaged grades achieved using a lower and upper cut-off grade across the datasets, which is considered appropriate at this level of exploration; and
- Thickness ranges used for the Exploration Target are based on downhole thickness that are thought to represent true thickness of the various grade mineral envelopes showing reasonable geological and grade continuity.
The surface expression of the Exploration Target was generated in GIS software integrating the above datasets. The surface areas were calculated for each zone and multiplied by the average bulk density. The outlines were then multiplied by the depth ranges as defined by auger and AC drilling in the various zones. The results are presented in Table 1 and the locations and data distribution is presented in Figure 2 and a cross-section in Figure 3.
Table 1 Maiden Exploration Target for the Bagamoyo Project
||Lower Thickness (m)
||Upper Thickness (m)
||Lower Tonnage (Mt)
||Upper Tonnage (Mt)
|BG2 - a
|BG2 - b
|BG4 - a
|BG4 - b
The drill programs performed to date have been highly effective in terms of mineral sands discovery and enhancing the Company’s understanding of the Bagamoyo anomalies. In light of these assay results and the large-scale Exploration Target, the Company will continue to define the prospects over time, with the aim to delineate Mineral Resources suitable for project feasibility assessment.
Figure 2 Bagamoyo Project – Exploration Target outlines for the BG-2 and BG-4 anomalies
Figure 3 Cross section line looking northwest from BG-2 that is open to the north east
SOUTHERN EXPLORATION REGION:
SUDI PROJECT – Assays reveal thick intervals of heavy mineral sands along the 8km anomaly defined at Sudi
The Sudi Project forms part of the Earn-in and Joint Venture Agreement with Rio Tinto Mining & Exploration Limited (Rio Tinto) across the Company’s suite of HMS tenements located in the southern region of Tanzania. The Joint Venture has enabled Strandline to accelerate exploration activities on the Project Area, with Rio Tinto contributing expertise and funding.
Exploration activities to date have outlined minerals sands anomalies with elevated grades and high-value assemblage from surface with the next phase of drilling to commence across priority targets at Sudi and other areas of interest in Southern Tanzania (see ASX release dated 14 March 2018).
MADIMBA PROSPECT – opportunity for multiple high grade mineralised zones
- First phase aircore drilling defined continuous mineralised zone at least 2000m along strike and 250m wide with thickness of 9m (see Figure 1)
- High grade intersections from drilling include 9m @ 4.1% THM and 7.5m @ 5.4% THM (see Figure 2)
- Mineralisation begins from surface and is open at depth
- Potential for series of deposits over >12km strike defined by radiometric geophysical data
- High unit value mineral assemblage
- VHM in the total heavy mineral concentrate up to 98% (ave 81%)
- Zircon + Rutile in VHM is up to 16.4% (ave 12%)
- Ilmenite in VHM averages 67.4%
- Infrastructure – Close to Mtwara Port & Power.
Figure 1: Map of Madimba prospect drillhole locations and mineralised zones
Figure 2: Madimba prospect drillhole cross section highlighting high grade mineralisation from surface to 9m depth