Rockcliff Completes 100% Earn-in on Bur Property

October 21, 2020

Rockcliff Metals Corporation (“Rockcliff” or the “Company”) (CSE: RCLF) (FRANKFURT: RO0, WKN: A2H60G) is pleased to announce that is has completed the required expenditures necessary for the Company to earn a 100% ownership interest in the Bur Property pursuant to the Company’s option agreement with Hudbay Minerals Inc. (“Hudbay”) dated September 20, 2016 (the “Option Agreement”). Rockcliff has delivered written notice to Hudbay advising the achievement of this milestone.

Rockcliff’s 100% Interest in the Bur Property

  • The Bur Property hosts the Bur Zinc-Copper deposit. A NI 43-101 compliant technical report was prepared on the Bur Property in 2007. Rockcliff is treating the estimate of mineral resources as an “historical estimate” under NI 43-101 and not as a current mineral resource. 
  • Recent drilling intercepted near surface high grade zinc-copper mineralization including 13.51% ZnEq across 3.26 metres and 15.64% ZnEq across 1.94 metres, as disclosed in the Rockcliff press release dated May 7, 2020.
  • Historic and recent drilling throughout the Bur Property has encountered near surface, disseminated, semi-massive and massive sulphide mineralization below shallow overburden.
  • Rockcliff has incurred +$3.0 million in expenditures required to earn its 100% interest in the property.
  • Hudbay has a 12 month back-in right which expires in August of 2021. The back-in right gives Hudbay the right to reacquire a 70% ownership interest in the property, by making cash payments to Rockcliff totalling $3,000,000 plus two times the amount of expenditures incurred by Rockcliff during the back-in waiting period to a maximum of $1,500,000. If Hudbay does not exercise its back-in right, Rockcliff as the operator, shall pay 2% of Net Smelter Return Royalty from the date of the Commencement of Commercial Production.

Rockcliff is the largest junior development and exploration landholder in the Flin Flon-Snow Lake greenstone belt, a region Rockcliff believes is the most extensive Paleoproterozoic Volcanogenic Massive Sulphide (“VMS”) district (copper, gold, zinc, silver) in the world. 

Bur Drill Results includes 13.51% ZnEq across 3.26 Metres and 15.64% ZnEq across 1.94 Metres

The completion of the phase four drill program in May 2020 was successful in identifying additional shallow, near surface, high-grade zinc-copper mineralization along strike of the historical Bur Zinc-Copper Deposit (pressed released May 7, 2020).

Significant down the hole assays from Rockcliff’s phase four drill program are included in the following table: 

Figure1: Partial Longitudinal Projection of Bur Zinc-Copper Deposit (dark red), Surrounding Mineralized Envelope (pale red) and 2020 Drill Hole Pierce Points with Assay Intervals

A report was prepared on the Bur Property in 2007. Rockcliff is treating the estimate of mineral resources on the Bur Zinc-Copper Deposit Report as an “historical estimate” under NI 43-101 and not as a current mineral resource. 

Historical estimates of grade and tonnage disclosed in this press release are viewed as reliable and relevant based on the information and methods used at the time. The 2007 NI 43-101 Bur Deposit Report was prepared in compliance with resource definitions under NI 43-101 but must be considered only as historic resources as neither Rockcliff nor its Qualified Persons have done sufficient work to classify the historic estimate as a current mineral resource under current mineral resource or mineral reserve terminology. The historic resource should not be relied upon.  Additional work including surface geophysics, drilling and bore hole geophysics will need to be completed to upgrade the historical resource to current.

The historical Bur Zinc-Copper Deposit is a narrow stratiform, distal, VMS deposit that occurs within a turbidite assemblage of interbedded metagreywacke, metasiltstone and graphitic meta-argillite in a basinal area situated between two granitic intrusions. The northeast striking deposit dips 60-70 degrees northwest, ranges from <0.3metres up to 5 metres thick and to date has a known lateral extent of approximately 4,500 metres.  Historic and recent drilling throughout the Bur Property has encountered near surface, disseminated, semi-massive and massive sulphide mineralization below shallow overburden along a strike length of over 8,000 metres and to a vertical depth of 950 metres. Mineralization consists of sphalerite, chalcopyrite, pyrrhotite, pyrite, galena and arsenopyrite. The Bur Zinc-Copper Deposit is open in all directions and contains up to 20% felsic or cherty nodules consisting of wall-rock and late quartz fragments displaying a brecciated texture to the mineralization. 

Image 1: Bur site is accessible by road leading to a previously constructed box-cut and portal.

Quality Control and Quality Assurance 

Samples of half core were packaged and shipped directly from Rockcliff’s field office to TSL Laboratories (TSL), in Saskatoon, Saskatchewan.  TSL is a Canadian assay laboratory and is accredited under ISO/IEC 17025.  Each bagged core sample was dried, crushed to 70% passing 10 mesh and a 250g pulp is pulverized to 95% passing 150 mesh for assaying.  A 0.5g cut is taken from each pulp for base metal analyses and leached in a multi acid (total) digestion and then analyzed for copper, lead, zinc and silver by atomic absorption.  Gold concentrations are determined by fire assay using a 30g charge followed by an atomic absorption finish.  Samples greater than the upper detection limit (3000 ppb) are reanalyzed using fire assay gravimetric using a 1 AT charge.  Rockcliff inserted certified blanks and standards in the sample stream to ensure lab integrity. Rockcliff has no relationship with TSL other than TSL being a service provider to the Company. 

Ken Lapierre P.Geo., Vice-President, Exploration of Rockcliff, a Qualified Person in accordance with Canadian regulatory requirements as set out in NI 43-101, has reviewed and approved the scientific and technical information that forms the basis for the disclosure contained in this press release.

About Rockcliff Metals Corporation

Rockcliff is a well-funded Canadian resource development and exploration company, with a fully functional +1,000 tonne per day leased processing and tailings facility as well as several advanced-stage, high-grade copper and zinc dominant VMS deposits in the Snow Lake area of central Manitoba. The Company is a major landholder in the Flin Flon-Snow Lake Greenstone Belt (“Belt”) which is home to the largest Paleoproterozoic VMS district in the world, hosting mines and deposits containing copper, zinc, gold and silver. The Company’s extensive portfolio of properties totals approximately 4,500 square kilometres and includes eight of the highest-grade, undeveloped VMS deposits in the Belt. 

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