Nickel Creek Platinum announces results on Wellgreen Deposit

By Nickel Creek Platinum | December 19, 2022

Nickel Creek Platinum Corp. (TSX: NCP) ("Nickel Creek" or the "Company") announced further results from work being conducted on behalf of the Company by Dr. Gregory Dipple at CarbMinLab, University of British Columbia. This ongoing work indicates significant uptake of COfrom a composite sample in bench-top testing. The results indicate a carbon sequestration capability of approximately 34.4 kt CO2 per year (2.1 kt CO2 per Mt tailings).

"We are very excited to announce that we have demonstrated substantial carbon capture from the Wellgreen deposit," commented Stuart Harshaw, President and Chief Executive Officer of Nickel Creek. "This represents an opportunity to capture carbon in the form of COthat will significantly reduce Nickel Creek's overall carbon footprint.  This will provide a value to the downstream processors of our nickel, in particular the EV battery market, where reducing the carbon footprint is a critical part of the green economy."

A summary of the results is presented below with a detailed summary also available on the Nickel Creek Platinum website.

Summary

The Wellgreen deposit, which forms part of the Company's Nickel Shäw Project, contains extensive Ni-Cu-Platinum-Group Elements (PGE) mineralization dominantly hosted in ultramafic rocks. It is being assessed for its potential for carbon capture and storage based on samples provided by Nickel Creek. Previous work at CarbMinLab confirmed the presence of brucite (a magnesium-rich mineral known to react quickly with CO2 in air) in subset of samples with concentrations ranging from 1 to 3% based on thermogravimetric analysis (TGA) and leach tests. The mineralogy and Total Inorganic Carbon (TIC) content of the composite sample used in the current test work is listed below in Table 1.

Table 1. Composite mineralogy and initial Total Inorganic Carbon (TIC) characterization results. (CNW Group/Nickel Creek Platinum Corp.)

The passive reactivity of brucite-bearing processed mine waste from the Wellgreen Deposit of the Nickel Shaw Ni-Cu-PGM Project (YT, Canada) was measured from the influx of CO2 into solution and the increase in inorganic carbon from carbonate mineralization. A composite of Wellgreen pulps captured 2.1 g CO2 per kg over 28 days.  A survey chamber was used to measure CO2 influx into the composite sample every four hours for 2 to 3 days at a time. Deionized water was added to account for evaporative losses daily, five days a week. The composite was also churned to homogenize the material and bring brucite to the surface five days a week. After 28 days, the experiment was completed, and TIC was measured (as a check on the CO2 influx measurements) on carbonated subsamples to assess the increase due to mineralized CO2. Passive sequestration on the scale of kilotonnes of CO2 per year is possible and could have a significant impact on reducing the carbon footprint from mining the Wellgreen deposit.

Internal desktop evaluations approximate the generation of 9 to 16.4 Mt of tailings generated per year. On a mass basis, from the achieved reactivity in this study, this would enable maximum sequestration of approximately 34.4 kt CO2 per year (2.1 kt CO2 per Mt tailings). Passive rates are also limited by the rate of tailings deposition, the processed tailings water content, the type of tailings storage (subaerial versus subaqueous), and the local climate. See Figure 1 below for a general schematic of tailings-based carbon capture. 

Figure 1. General schematic of carbon capture in ultramafic mine tailings. (CNW Group/Nickel Creek Platinum Corp.)

It should be noted that the composite sample used in the current study is not necessarily representative of the overall Wellgreen deposit. The company is evaluating further work which will include the creation of a mineralogy model based on the project's geochemical database to assess the spatial distribution of rocks within the Wellgreen deposit that have high potential to sequester carbon.

Scientific and Technical Information

The scientific and technical information disclosed in this news release was reviewed and approved by Cameron Bell, P.Geo., a "Qualified Person" as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects ("NI 43-101").