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Australia
Kumpupintil Lake Project

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 Location:
340 km E from Newman, Western Australia, Australia

  Project Contacts:
159 Stirling Highway
Nedlands
Western Australia, Australia
6009
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Fax08-9386-9473
EmailEmail
WebsiteWeb
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  • Overview
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  • Geology
  • Mining
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  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Potash
  • Sulfate of potash (SOP)
Mining Method
  • Brine mining
Mine Life22.75 years (as of Jan 1, 2018)
The Kumpupintil Lake Potash Project (KP) is the world’s largest SOP brine project outside of China.

State environmental approval was achieved in June 2020.

Commonwealth environmental approval under the EPBC Act is entering its final phase.


Owners

Source: p. 14
CompanyInterestOwnership
Reward Minerals Ltd. 100 % Indirect
Reward’s flagship project is its 100% owned LD SOP Project, located 340 km east of Newman in the Little Sandy Desert of north-western Western Australia.

Contractors

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Deposit Type

  • Sedimentary
  • Brine


Summary:

The Little Sandy Desert region, within which the LD Project is located, is underlain by the Savory Basin.

The shallow sediments of the Savory and southwestern Yeneena Basins generally comprise gently eastdipping medium to coarse-grained sandstone and pebbly conglomerate. The underlying bedrock outcrops infrequently: more than 90% of the basin is covered by unconsolidated or semi-consolidated Cainozoic deposits, consisting largely of windblown sands in the form of dunes and sandplains (Williams, 1992). The sand is composed of medium to medium-coarse quartz grains, with occasional ferruginised grains or ironstone pebbles. The wide-spread longitudinal dunes that occur throughout the Savory Basin are thought to have formed during the intensely arid conditions that prevailed during the last glacial maximum. Colluvial deposits occur to a limited extent in the Basin and are mostly located adjacent to infrequent rocky outcrops. Alluvial deposits of unconsolidated silt, sand and gravel are also relatively uncommon and are restricted mostly to drainage lines and to the terminal Lake Disappointment playa.

The superficial sequences are underlain at variable depth by members of the Neoproterozoic Tarcunyah Group, which comprises an interbedded sequence of sandstone, siltstone and shale deposited around 800 Ma. These bedrock materials outcrop locally to the east and the south-west of LD.

The stratigraphy beneath and adjacent to LD reported in published lit ........


Mining Methods

  • Brine mining


Summary:

The project will extract brine from the surface of the playa via infiltration trenches and then be moved from the infiltration trenches to the main feed channel and then into a series of evaporation ponds.

The total length of the initial trench system will be approximately 133 km including 116 km of infiltration trenches. These will be relatively shallow at around 1.8 m which is 0.5 m below the nominal base of the gypsum sand layer, although further tests are being conducted on deeper trenches.

Excavators (30 t machines with 15 m reach and amphibious tracks) will operate on a permanent basis for ongoing trench maintenance to ensure that they remain in an open, free flowing condition. The material from trench excavation will be used to construct road bunds and flood protection bunds alongside the trenches.

The brine from the infiltration trenches will flow into the plant feed channel and then onto the halite ponds at the start of the brine evaporation system. The feed channel will be 6 m wide and 2.5 m deep at the start in the infiltration area and gradually increase in depth along the 16.3 km distance from the trenches to the corner of the halite pond area.


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Potash Mt 0.49
All production numbers are expressed as sulphate.

Operational Metrics:

Metrics
Annual brine extraction 63 GL *
* According to 2018 study.

Reserves at May 1, 2018:

CategoryTonnage CommodityGradeContained Metal
Indicated 6,826 M cu.m Sulfate of potash (SOP) 13.4 kg/cu.m 12.39 Mt
Inferred 98,821 M cu.m Sulfate of potash (SOP) 11.2 kg/cu.m 140.62 Mt
Total Resource 105,647 M cu.m Sulfate of potash (SOP) 11.35 kg/cu.m 153.1 Mt

Commodity Production Costs:

CommodityAverage
All-in sustaining costs (AISC) Potash 394 / t *  
C1 cash costs Potash 362 / t *  
C2 total cash costs Potash 408 / t *  
C3 fully allocated costs Potash 433 / t *  
Assumed price Potash 500 / t *  USD
* According to 2018 study / presentation.

2018 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
Total CapEx $M AUD  ......  Subscription required
Total OpEx $M AUD  ......  Subscription required
Total Taxes $M AUD  ......  Subscription required
Gross revenue (LOM) $M AUD  ......  Subscription required
EBITDA (LOM) $M AUD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscription required
After-tax Cash Flow (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 8% $M AUD  ......  Subscription required
After-tax NPV @ 8% $M AUD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Sep 16, 2021
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
Pre-Feasibility Study Report 2018
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