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United States
Clayton Valley (Cypress) Project

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 Location:
279 km SE from Reno, Nevada, United States

  Project Contacts:
Suite 1610, 777 Dunsmuir Street
Vancouver
British Columbia, Canada
V7Y 1K4
Phone  ...  Subscription required
Fax1-(604)-687-3119
WebsiteWeb
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  • Overview
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  • Mining
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  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Lithium
Mining Method
  • Truck & Shovel / Loader
Mine Life40 years (as of Jan 1, 2020)
Latest NewsCypress Development Provides Progress Update On Feasibility Study And Lithium Extraction Facility     January 23, 2023


Owners

Source: p. 14
CompanyInterestOwnership
Cypress Development Corp. 100 % Indirect
Cypress’ property consists of 5,430 acres (2,197 hectares) of U.S. Federal mining claims. The claims are held 100% by Cypress and subject to an underlying net smelter return (NSR) agreement.

Contractors

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Deposit Type

  • Sedimentary


Summary:

The western portion of the project area is dominated by the uplifted basement rocks of Angel Island which consist of metavolcanic and clastic rocks, and colluvium. The southern and eastern portions are dominated by uplifted, lacustrine sedimentary units of the Esmeralda Formation. Locally the Esmeralda Formation is comprised of fine grained sedimentary and tuffaceous units, with some occasionally pronounced local undulation and minor faulting. The resulting topography consists of elongate, rounded ridges of exposed Esmeralda Formation separated by washes and gullies filled with alluvial cobble, gravel and fine sediment. The ridge tops are commonly mantled weathered fragments of rock (desert pavement) sourced from the surrounding highlands. Cypress provides the following description of the stratigraphic units of the Esmeralda Formation in the project area, which form a laterally and vertically continuous stratigraphic section which underlies the south and eastern portions of the project area.

Elevated lithium concentrations, generally > 600 ppm, are encountered in the local sedimentary units of the Esmeralda Formation from surface to at least 142 meters below surface grade (bsg). The lithium-bearing sediments primarily occur as silica-rich, moderately calcareous, interbedded tuffaceous mudstone, claystone and siltstone. The overall mineralized sedimentary suite is a laterally and vertically extensive, roughly tabular zone with at least two prominent oxidation horizo ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

All materials within the project’s resource area are relatively flat lying soft sediments. The deposit is covered by a thin veneer of alluvial gravels and extends to a depth of 100 to 140 meters.

Mining will be carried out using conventional surface methods. Excavation will use a single Caterpillar 6020B or equivalent shovel (hydraulic excavator configuration) with a 12 m³ bucket capacity. The material is very soft, so drilling and blasting will not be required.

Truck haulage was studied as an alternative. Conveyor transport to the mill is preferred due to reduced traffic and water for dust control. Conveyors should also result in lower operating cost due to the consumption of electric power instead of diesel.

Material at the mining face will be fed directly to a mobile feeder-breaker and then moved out of the pit using a series of jump conveyors. The material will then be transferred to over-land conveyors and transported to a radial stacker and run-of-mine (ROM) stockpile located at the processing plant.

An ultimate pit shell was used to limit the mine plan and was generated using the variable pit slope.

The bench height and width were set at 7.5 meters and 6 meters, respectively, based on operating equipment reach and minimum road width.


Within the ultimate pit shell, 16 pit phases were generated. The first eight of these were used to design a production schedule with uniform mill feed and minimal wa ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsDailyAvg. Annual
LCE t  ......  Subscription required27,400
Subscription required - Subscription is required.

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Annual production capacity  ......  Subscription required
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
* According to 2020 study.
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Reserves at May 19, 2020:
The cutoff of 900 ppm is an optimized cutoff selected for the mine production schedule.

CategoryTonnage CommodityGradeContained Metal
Probable 222.8 Mt Lithium 1141 ppm 254.3 kt
Probable 222.8 Mt LCE 1,353 kt
Measured 432.4 Mt Lithium 1088 ppm 470.4 kt
Indicated 160.9 Mt Lithium 1032 ppm 166 kt
Measured & Indicated 593.3 Mt Lithium 1073 ppm 636.4 kt
Measured & Indicated 593.3 Mt LCE 3,387 kt
Inferred 2.3 Mt Lithium 1005 ppm 2.3 kt

Commodity Production Costs:

CommodityUnitsAverage
Cash costs LCE USD  ......  Subscription required&nbs
Assumed price LCE USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2020
OP mining costs ($/t milled) USD 1.83 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2020 study.
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2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx  ......  Subscription required
After-tax NPV @ 8%  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of May 19, 2020:
HME TypeModelSizeQuantity
Compactor ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 19, 2020
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required May 19, 2020
....................... Subscription required ....................... Subscription required Subscription required Aug 27, 2021
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
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News:

NewsDate
Cypress Development Provides Progress Update On Feasibility Study And Lithium Extraction Facility January 23, 2023

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