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Tanzania
Ngualla Project

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 Location:
150 km NW from Mbeya, Tanzania

  Project Contacts:
Level 9, 190 St Georges Terrace
Perth
Western Australia, Australia
Phone  ...  Subscription required
Fax+61-8-9226-3831
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • REE
  • Nd2O3+Pr6O11
Mining Method
  • Truck & Shovel / Loader
Mine Life24 years (as of Jan 1, 2022)
Ngualla is Large scale, high-grade deposit with a long mine life and low opex and capex intensity.


Owners

Source: p. 31
CompanyInterestOwnership
Peak Resources Ltd. 100 % Indirect

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Magmatic
  • Carbonatite hosted


Summary:

Rare earth and barite mineralisation at Ngualla is magmatic in origin and hosted within the core of the Ngualla Carbonatite. Mineralisation has been residually enriched in the oxide zone at surface through weathering and the removal of carbonate minerals to variable depths of up to 140 m vertically.

High-grade rare earth mineralisation is hosted within the iron oxide and barite-rich weathered zone and above an irregular karstic surface, referred to as the Weathered Bastnaesite Zone. For modelling purposes, upper grade thresholds of 0.69% P2O5 and 13.99% CaO have been used to assist with the definition of Weathered Bastnaesite Zone Mineral Resource subset reported, which has been found through test work to be most amenable to the current metallurgical extraction process.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining is based on conventional selective mining methods, utilising hydraulic excavators, dump trucks and drill-and-blast, coupled to a ROM stockpile. All the ore is oxidised material categorised as “free dig”, so only the fresh waste rock requires blasting.

Both ore and waste will be excavated in 2.5 m flitches following mark-out by grade control. Ore will be hauled to either the ROM pad skyway and tipped onto a designated ore finger or a designated low-grade stockpile. All mine waste will be hauled directly from the pit and placed onto a designated location of the tailings storage facility (TSF) dam wall; there are no other external waste dumps.

The mining fleet comprises 41-tonne articulated dump trucks (Caterpillar 745) loaded by a 90- tonne excavator (Caterpillar 395). A 30-tonne front-end loader (Caterpillar 980M), which is capable of loading the 41-tonne dump trucks, will be used as back-up for the primary loading unit and also to make up shortfalls in periods where additional material movement is required. Other ancillary support will be supplied by a Cat D9R dozer, Cat 14M grader, and Cat 745 watercart. Maintenance will be conducted on site.

Owner-operated mining was selected as the operating strategy at Ngualla, with the intent of further reviewing potential contract mining offerings during the Front-End Engineering Design (FEED) phase.

The pit and stage designs were based on the slope parameters: Saprolite (21.3°), Mixed ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. Annual
Total Rare Earth Oxides kt 16
All production numbers are expressed as concentrate.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Annual milling capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at October 31, 2022:
Cut-off grade 1% TREO.

CategoryTonnage CommodityGradeContained Metal
Proven 17 Mt Total Rare Earth Oxides 4.78 % 813 kt
Probable 1.5 Mt Total Rare Earth Oxides 5.1 % 74 kt
Proven & Probable 18.5 Mt Total Rare Earth Oxides 4.8 % 887 kt
Measured 86.1 Mt Total Rare Earth Oxides 2.61 % 2,250 kt
Indicated 112.6 Mt Total Rare Earth Oxides 1.81 % 2,040 kt
Inferred 15.7 Mt Total Rare Earth Oxides 2.15 % 340 kt
Total Resource 214.4 Mt Total Rare Earth Oxides 2.15 % 4,620 kt

Commodity Production Costs:

CommodityAverageAverage
Cash costs Nd2O3+Pr6O11  ......  Subscription required&nbs
Assumed price Nd2O3+Pr6O11  ......  Subscription required *
* According to 2022 study / presentation.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Closure costs $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of October 24, 2022:
HME TypeModelSizeQuantityLeased or
Contractor
Bulldozer ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 19, 2023
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 2022
Feasibility Study Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Feasibility Study Report 2017
Press Release 2017
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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