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Australia
Lake Way Project

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 Location:
15 Km S from Wiluna, Western Australia, Australia

  Project Contacts:
Ground Floor 239 Adelaide Terrace
Perth
Western Australia, Australia
6000
Phone  ...  Subscription required
Fax+61-8-6559-5820
EmailEmail
WebsiteWeb
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  • Filings & News

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Overview

StageConstruction
Mine TypeIn-Situ
Commodities
  • Sulfate of potash (SOP)
  • Potassium
Mining Method
  • Brine mining
Mine Life20 years (as of Jan 1, 2019)
A drilling campaign commenced in March 2020 to install test production bores into the paleochannel basal sand unit. A total of 111 bores have been installed and include 32 in the paleochannel basal sands (19 monitoring bores and 13 production bores) and 79 in the intermediate lakebed sediments unit (18 monitoring bores and 61 production bores). This program is still underway as of December 2021. Brine production commenced in September 2020 and the borefield has been operating continuously with 52 production bores pumping as of December 2021.


Owners

Source: p. 71
CompanyInterestOwnership
Salt Lake Potash Ltd. 100 % Indirect

Contractors

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Deposit Type

  • Brine


Summary:

The deposit is a salt-lake brine deposit. The lake setting is typical of a Western Australian palaeovalley environment. Ancient hydrological systems have incised palaeovalleys into Archaean basement rocks, which were then infilled by Tertiary-aged sediments typically comprising a coarse- grained fluvial basal sand overlaid by palaeovalley clay with some coarser grained interbeds. The clay is overlaid by recent Cainozoic material including lacustrine sediment, calcrete, evaporite and aeolian deposits.

The province is characterised by granite–greenstone rocks that exhibit a prominent northwest tectonic trend and low to medium-grade metamorphism. The Archaean rocks are intruded by East– West dolerite dykes of Proterozoic age, and in the eastern area there are small, flat-lying outliers of Proterozoic and Permian sedimentary rocks. The basement rocks are generally poorly exposed owing to low relief, extensive superficial cover, and widespread deep weathering. A key characteristic of the goldfields is the occurrence of paleochannel aquifers. These paleodrainages are incised into the Archean basement and in-filled with a mixed Tertiary and Quaternary sedimentary sequence.

The paleochannel sediments of Lake Way are characterised by a mixed sedimentary sequence including sand, silts and clays of lacustrine, aeolian, fluvial and colluvial depositional origins. These near-surface deposits also include chemically-derived sediments of calcrete, silcrete and ferricre ........


Mining Methods

  • Brine mining


Summary:

It is assumed that the Brine resource will be mined by gravity drainage to a network of trenches excavated into the Playa Surface and an array of production bores completed in the paleochannel basal sand.


Crushing and Grinding


Processing

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Summary:

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Projected Production:

CommodityUnitsAvg. Annual
Sulfate of potash (SOP) t 245,000
All production numbers are expressed as crystals.

Operational Metrics:

Metrics
Plant annual capacity 2.27 Mt *
Annual brine extraction 18.2 GL *
* According to 2019 study.

Reserves at October 11, 2019:

CategoryTonnage CommodityGradeContained Metal
Probable 474 GL Potassium 5 kg/cu.m 2.4 Mt
Measured 135 M cu.m Sulfate of potash (SOP) 2 Mt
Indicated 147 M cu.m Sulfate of potash (SOP) 2 Mt
Inferred 491 M cu.m Sulfate of potash (SOP) 7.4 Mt
Total Resource 773 M cu.m Sulfate of potash (SOP) 11.4 Mt

Commodity Production Costs:

CommodityUnitsAverage
Site cash costs (produced) Sulfate of potash (SOP) USD  ......  Subscription required
Total cash costs Sulfate of potash (SOP) USD  ......  Subscription required
C1 cash costs Sulfate of potash (SOP) USD  ......  Subscription required
Assumed price Sulfate of potash (SOP) USD  ......  Subscription required
* According to 2019 study / presentation.

2019 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $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 TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 11, 2019
....................... Subscription required ....................... Subscription required Subscription required Apr 18, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Preliminary Economic Assessment 2016
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