Spearmint More than Doubles its Resource Estimate on the McGee Lithium Clay Deposit in Clayton Valley, Nevada

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Algemeen advies 18/06/2022 07:00
June 17, 2022 – Spearmint Resources Inc. (CSE: SPMT) (OTC Pink: SPMTF) (FSE: A2AHL5) (the “Company” or “Spearmint”) is pleased to announce that it has received the updated Technical Report and Mineral Resource estimate for the 100-per-cent-owned McGee Lithium Clay Deposit in Clayton Valley, Nevada. The Technical Report includes an updated Mineral Resource estimate of 1,369,000 indicated tonnes and 723,000 inferred tonnes of lithium carbonate equivalent (LCE) for a total of 2,092,000 tonnes of LCE. The Technical Report and Mineral Resource Estimate has been prepared by Derek Loveday, P.Geo. and Mariea Kartick, P.Geo. of Stantec Consulting Services Ltd. (“Stantec”) in conformity with CIM “Estimation of Mineral Resource and Mineral Reserves Best Practices” guidelines and are reported in accordance with the Canadian Securities Administrators NI 43-101. The Stantec Qualified Persons (Derek Loveday, P.Geo. and Mariea Kartick, P.Geo.), have direct experience in lithium clay exploration projects in Nevada. Derek Loveday was the Qualified Person for the American Lithium Corp. (LI-TSX.v, LIACF-USA) TLC Lithium Project Technical Report.

To view the 43-101 Technical Report click here.

James Nelson, President of Spearmint Resources stated, “We are very pleased to have increased our mineral resource estimate by more than double that of our maiden resource estimate. We foresee continued consolidation within the lithium space and this updated report adds significant value to Spearmint. Our goal is to develop this deposit with the hope to secure a domestic source of lithium right in the heart of the Clayton Valley, Nevada, one of the top lithium districts in the world. The four holes drilled in 2022 allowed us to significantly expand the resource to the west and based on this report, further potential increases to this resource estimate are possible. Lithium prices and demand remain near all-time highs, up over 900 percent since the start of 2021. In addition, announced on March 31, 2022, President Joe Biden enacted the Defense Production Act to increase domestic production of strategic and critical materials, such as lithium and cobalt, needed to build batteries for electric vehicles and other types of energy technologies. This could provide a major catalyst and sector momentum for developing domestic sources of battery metals.”

Spearmint’s McGee Lithium Clay Deposit is located 55 kilometres (34 miles) west of the town of Tonopah. The Deposit is accessed off paved State Highway 265, which terminates at the Silver Peak Mine, and then by well-maintained county gravel roads. The Deposit consists of 26 contiguous unpatented placer claims that span from McGee 30 to McGee 55 and cover 890 acres (~360 hectares).

Exploration drilling in the Deposit has identified three main geological units, a zone of mixed sediments (tuffaceous mudstone) overlying a green clay that in turn overlies a brown sandstone. The mixed sediments gradationally overly the green clays and are positively weathering relative to the green clay below. Lithium mineralization is present in the green clays with some, though minor, elevated lithium concentrations in the mixed sediments above. Lithium mineralization at depth is limited to the green clay-brown sandstone contact that ranges from near surface to maximum depth of approximately 900 ft (274 m) below surface.

The dimensions of the mineralized claystone on the Deposit have expanded significantly with the inclusion of four new drillholes in 2022 since the prior Loveday and Turner (2021) Technical Report. Mineralize claystone aerial footprint has expanded from 0.87 to 1.22 square miles (2.2 to 3.16 km2). This increase is the result of the placement of four new drillholes in the west of the Property in 2022 that sampled lithium claystone in a region previously interpreted as not containing lithium mineralization due to lack of supporting data.

The geologic model from which lithium resources are reported is an update of the 3D block model originally compiled by Loveday and Turner (2021). The resource estimates are contained within an economic pit shell at constant 45° pit slope to a maximum vertical depth of 885 ft (270 m) below surface using a base case cutoff grade of 300 ppm lithium to produce an eventual battery grade lithium carbonate product.

The following costs, recoveries and revenue, in metric units and US$, were used to derive a base case cutoff grade for an eventual lithium carbonate (Li2CO3) product:

Mining costs US$2.50/tonne;
Processing costs US$15/tonne;
Processing recovery 80%; and
US$14,000/tonne revenue for Li2CO3
The lithium mineral resource estimates are presented in Table 25.1 in U.S. customary units and Table 25.2 in metric units. Lithium resources are presented for a range of cutoff grades to a maximum of 900 ppm lithium. The base case lithium resource estimates are highlighted in bold type in Table 25.1 and Table 25.2. All lithium resources on the Deposit are surface mineable at a stripping ratio of 0.30 waste yd3/ton (0.25 m3/tonne) at the base case cutoff grade of 300 ppm lithium. The effective date of the lithium resource estimate is June 8, 2022.

The mineral resource estimates represent as an increase from the prior Loveday and Turner (2021) estimates with base case lithium carbonate (Li2CO3) equivalent tonnes increasing from 0.815 to 1.369 million tonnes at an Indicated level of assurance. Base case inferred Li2CO3 equivalent tonnes increase from 0.191 to 0.723 million tonnes. The increase is attributed to further expansion of the mineral resource extent to towards the west and improvements in the market price of battery grade Li2CO3 reducing the base case resource cutoff grade from a minimum of 400 ppm Li to 300 ppm Li.

Table 25.1
Lithium Resource Estimates – U.S. Customary Units

Cutoff Volume Tons Li Tons (‘000 st)

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