Project Overview

Sayona’s Authier Lithium Project in Québec, Canada is a hard rock spodumene lithium deposit set to play a key role in the Company’s planned multi-project Abitibi lithium hub, as a source of supplementary ore for processing at NAL when production restarts.

Following the acquisition of the NAL mine and concentrator in August 2021, the Authier project’s operating strategy was revised to include only mining operations and waste and water management on-site.

The project is set to become a supplier of ore to Sayona’s nearby North American Lithium operation , which has an established concentrator, thereby minimising the need for mining infrastructure and related environmental impacts at Authier.

Sayona Mining acquired 100% of the Authier project in July 2016. The project’s key attractions include its near-term development potential, access to world-class infrastructure and labour, economical hydroelectric power and its strategic location near North American battery markets.

The Authier project is situated 45 kilometres northwest of the city of Val d’Or, a major mining service centre in Québec. Val d’Or is located approximately 466 kilometres north-east of Montreal. The project is easily accessed by a rural road network connecting to a national highway a few kilometres east of the project site.

The project area comprises 19 mineral claims totalling 653 hectares, and extends 3.4 kilometres in an east-west, and 3.1 kilometres in a north-south direction, respectively. The mineral claims are located over Crown Lands.

The deposit is hosted in a spodumene-bearing pegmatite intrusion. The deposit is 825 metres long, striking east-west, with an average thickness of 25 metres, minimum 4 metres and maximum 55 metres, dipping at 40 degrees to the north. The current pit optimisation has the mineralisation extending down to 200 metres depth but the deposit remains open in all directions.

(Above) Isometric views of the Authier pit with the mineralised envelope on the left from the February 2017 PFS

In November 2019, Sayona completed a revised Definitive Feasibility Study confirming the project’s viability as a profitable and sustainable new lithium mine that will provide new jobs, investment and strong returns for all stakeholders.

Historical Drilling

The Authier project has been subject to more than 31,000 metres of drilling. Between 2010 and 2012 Glen Eagle, the previous tenement holder, completed 8,990 metres of diamond drilling in 69 diamond drill holes (DDH) of which 7,959 metres were drilled on the Authier deposit; 609 metres (five DDH) were drilled on the northwest and 422 metres on the south-southwest of the property.

Sayona has completed three phases of drilling totalling more than 11,000 metres in 81 DDH. All the holes completed by Sayona and included in the Mineral Resource Estimate have used standard DDH, HQ or NQ core diameter size, using a standard tube and bit. The drilling programmes have been subject to very robust QA/QC procedures.

The Company believes there is further potential to optimise the main resource area including:

  • Infill drilling within the main deposit where there is no resource due to lack of drilling density (shown as block circles on Figure 1), especially in the east and west, and to add the resource base; and
  • Converting inferred resources into a higher resource classifications by further higher density drilling (shown as blue on the diagram).

Black circles represent areas where further density of drilling is required to increase the resource. Additionally, some of the blue Inferred Resource areas have the potential to be converted to higher resource categories with further drilling

The mineralisation remains open in all directions.

Environmental, Community and First Nations

Sayona continues to engage closely concerning Authier’s development with all stakeholders, including holding information sessions and consultations with local municipalities, landowners, First Nations communities, non‐governmental organisations and other stakeholders.

In December 2019, Sayona announced an agreement with First Nation Abitibiwinni for the works during the exploration phase of the Authier Lithium Project. This agreement is aimed at ensuring a collaborative and mutually beneficial partnership for the development of the project.

In parallel with the DFS, Sayona progressed a revised Environmental Impact Study (EIS) in accordance with Québec’s regulatory requirements. The EIS is a rigorous scientific study containing all the necessary documentation to satisfy the necessary legal and regulatory requirements.

The revised EIS was submitted to Québec’s Ministry of the Environment and the Fight against Climate Change (MELCC) in January 2020.

The plan to process Authier ore at NAL may impact on the requirements for approvals under the BAPE process. Regardless, the Company will continue the development of the Authier project under strict guidelines to minimise impacts on the environment, including reducing wind and water erosion, promoting revegetation and optimising water management practices.

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