Arca scientist Eric Wynands works with rover on ultramafic mine waste at a mining site in Western Australia in 2025
Arca Climate Technologies Inc. (“Arca”), an industrial mineralization company, and Giga Metals Corporation (“Giga Metals”) (TSX-V: GIGA; OTCQB: GIGGF; FSE: BRR2), a Canadian mining company advancing the Turnagain Nickel Project in British Columbia in partnership with Mitsubishi Corporation, today announced a 10-year Tailings Access and Waste Rock Access Agreement signed on January 9, 2026.
The agreement grants Arca the exclusive right to evaluate the potential of the ultramafic tailings and mine tailings at the Turnagain Project to permanently remove carbon dioxide from the atmosphere. Arca will conduct sampling, analysis, pilot-scale testing and techno-economic studies using its proprietary industrial mineralization technology.
Giga Metals estimates that approximately 1.3 billion tonnes of ultramafic material will be generated at the site once mining begins. Arca’s technologies activate minerals found in ultramafic rocks, accelerating a natural geochemical process called carbon mineralization: the transformation of atmospheric CO2 into a stable solid mineral form. Co-benefits are also generated related to the valorization of waste and the sustainability of mining sites. Arca estimates that deploying its technologies on site will create the lifetime potential to remove up to 220 million tons of carbon dioxide from the atmosphere.
The Canadian government Critical Minerals Strategy 2022 identified nickel production as a national priority to meet the demands of the energy transition, with the goal of making Canada a global supplier of choice for critical minerals. The pursuit of this goal has recently been strengthened by new investments and policies from the Canadian federal government, such as the State Fund for Critical Mineralsthe Defense Industrial Strategy and the Office for Major Projects.
“As Canada looks to strengthen our economy and our position as a leading producer of critical minerals, Turnagain stands out as one of the largest undeveloped nickel resources in the country,” said Paul Needham, CEO of Arca. “By linking the development of critical minerals to the permanent removal of carbon dioxide, Giga Metals and Arca will demonstrate a new mining paradigm with improved project economics and broader societal benefit.”
“At Giga Metals we have been working with Arca Principals on carbon sequestration for over a decade,” said Scott Lendrum, CEO of Giga Metals. “We are pleased to formalize our agreement so that both companies can focus on what they do best: producing nickel concentrate with high ESG credentials, and maximizing permanent carbon dioxide storage by converting mine waste into reactive storage minerals. By working with Arca, we can evaluate emerging technologies that can improve the environmental and economic performance of the Turnagain project while supporting innovation in the mining sector.”“
About Gigametalen
Giga Metals Corporation’s key asset is the Turnagain Project, located in northern British Columbia, which contains one of the few significant undeveloped sulfide nickel and cobalt resources in the world. Turnagain is held at Hard Creek Nickel, a subsidiary jointly owned by Giga Metals Corporation and Mitsubishi Corporation.
The Turnagain ultramafic complex also has potential for copper, platinum and palladium mineralization in the Attic Zone, an area adjacent to the known nickel resource.
Contact:
Scott Lendrum, CEO
info@gigametals.com
Phone: +1 (604) 681-2300
About Arca
Arca is an industrial mineralization company that uses pre-existing industrial infrastructure and alkaline waste to accelerate the natural process of carbon mineralization and permanently remove carbon dioxide from the atmosphere.
Arca was founded on 20 years of groundbreaking research at the University of British Columbia by Dr. Greg Dipple and is backed by some of the world’s leading climate technology investors. Arca is supported by several Canadian government departments and private philanthropies and was a Milestone Award winner and Top 20 finalist in the globally prestigious XPRIZE Carbon Removal competition.
Arca’s cost-efficient system ensures highly durable (over 10,000 years) relocations, supported by robust third-party verification. By working with heavy industries such as mining and steelmaking, Arca is laying the foundation for carbon removal on a gigatonne scale.
Contact:
Sean Lowrie, head of external affairs
sean@arcaclimate.com
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
Suite 604 – 700 West Pender St., Vancouver, BC, Canada V6C 1G8
A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/417da35e-3b51-47ae-8c6e-70f60c3fd8cb
#Arca #Giga #Metals #sign #exclusive #agreement #explore #carbon #removal #nickel #project #potential #remove #million #tonnes #carbon #dioxide #atmosphere