Mandalay Resources Corporation Announces Significant Grades and Depth Extension to the Lake Zone Veining of the Björkdal Deposit

TORONTO, Feb. 17, 2021 (GLOBE NEWSWIRE) -- Mandalay Resources Corporation ("Mandalay" or the "Company") (TSX: MND, OTCQB: MNDJF) is pleased to provide an update on the encouraging results from the Björkdal Depth Testing drilling program.

Björkdal Depth Testing Highlights

• 15 veins containing significant grades have been intercepted with inferred strike extensions of up to and over 300 meters (“m”)
• Standout intercepts identified:
  ○ 92.2 g/t gold over a true width of 0.40 m in MU20-021;
  ○ 32.5 g/t gold over a true width of 1.1 m in MU20-021;
  ○ 16.4 g/t gold over a true width of 1.11 m in MU20-022;
  ○ 119.2 g/t gold over a true width of 0.44 m in MU20-023; and
  ○ 58.5 g/t gold over a true width of 0.32 m in MU20-025.
• Identified skarnified marble lens:
  ○ 3.4 g/t gold over a true width of 5.01 m in MU20-024
  

Note: Significant drill composites are provided in Table 1 in the Appendix to this document.

Dominic Duffy, President and Chief Executive Officer of Mandalay, commented, “Given Björkdal’s long mine life of over 10 years, our exploration focus there has shifted away from incremental additions to existing resources and reserves to identifying and drilling more prospective areas with higher-grade mineralization possibilities. These exciting initial high-grade intercepts from the depth extension drilling have demonstrated significant continuation within the Lake Zone area. Follow up infill drilling will be ongoing as we endeavour to define the breadth of veining and bring these areas to production in the short term.”

Mr. Duffy continued, “Delivering an additional high-grade mining area for the operations will further enhance our ability to be selective in ore scheduling and ultimately lift production grade.”

Mr. Duffy concluded, “Alongside this exploration release, a video has been prepared by Mr. Chris Davis, Vice President of Operational Geology and Exploration to further illustrate the detail in this press release, I would like to invite everyone to view the posted video here.”

Björkdal Depth Extension

Since September 2020, a major focus of exploration at Björkdal has been on the depth and eastern extension of the Lake Zone veining. This veining sits beneath the marble unit, below and to the south of the Aurora Zone. This initial phase of drilling encompasses nine drillholes and has intercepted 15 veins containing some of the best grades seen at Björkdal. Interpretation of the drilling indicates that the veining is continuous though all holes drilled which is supported by our understanding of Lake Zone veining. Grades along these veins vary, however, for a 100 m strike along veining at 1600N three drillholes average a grade of 4.7 g/t gold over nominal mining width of 3 m.

Figure 1: Drill core from hole MU20-023 showing veining from a composited grade of 119.3 g/t gold over a true width of 0.44 m:
https://www.globenewswire.com/NewsRoom/AttachmentNg/210f1810-04b7-45da-a596-a07fc80512af

As well as the vein intercepts themselves, skarnified marble was intercepted in two of the drill holes indicating either a depth continuation to the previously mined Lake Zone Skarn or a discreet alterations lens. Veining within these lenses has been proven to be enriched and skarnified areas have predominantly delivered high grade ore so the presence of the alteration is highly encouraging.

The results of drilling in this area suggest the possibility of a significant increase in the development life of the Björkdal mine by providing a new mining area beyond the current workings on Main Zone and Aurora.

The drilling undertaken on this program to date marks the initial phase of exploration and an infill program has begun and is expected to be completed in Q2 2021.

Figure 2: Plan section of Björkdal mine illustrating the location of drilling and results from the Björkdal Deeps program. Newly extended veining it interpreted in red. Marble contact is interpreted in blue:
https://www.globenewswire.com/NewsRoom/AttachmentNg/0399fdd4-7e29-4468-9b53-7e7c7ad9daa3

Figure 3: North-South Cross Section illustrating the location and orientation of the new intercepts extending the Lake Zone veining down and to the east. Veining and interpreted lithology is displayed at 1780E with off-section holes projected onto the plain:
https://www.globenewswire.com/NewsRoom/AttachmentNg/40bedda3-53c6-4f7e-95b7-81ca59167142

Drilling and Assaying

All diamond drill core was logged and sampled by Björkdal geologists. Exploration drill hole samples were sent to CRS Laboratories Oy (“CRS”) in Kempele, Finland for sample preparation and assaying.

Assaying was conducted utilizing the Pal1000 cyanide leaching processes. Mandalay’s rigorous QA/QC program included the use of standard reference samples, blanks, duplicates, repeats, and internal laboratory quality assurance procedures. See March 30, 2020, Technical Report entitled “Technical Report on the Björkdal Gold Mine, Sweden”, available on SEDAR (www.sedar.com), for a complete description of drilling, sampling, and assaying procedures.

Qualified Person:

Chris Davis, Vice President of Operational Geology and Exploration at Mandalay Resources, is a Chartered Professional of the Australasian Institute of Mining and Metallurgy (MAusIMM CP(Geo)), and a Qualified Person as defined by NI 43-101. He has reviewed and approved the technical and scientific information provided in this release.

For Further Information

Dominic Duffy
President and Chief Executive Officer

Edison Nguyen
Manager, Analytics and Investor Relations

Contact:
647.260.1566

About Mandalay Resources Corporation

Mandalay Resources is a Canadian-based natural resource company with producing assets in Australia and Sweden, and care and maintenance and development projects in Chile. The Company is focused on growing production at its gold and antimony operation in Australia, and gold production from its operation in Sweden to generate near term cash flow.

Forward-Looking Statements:

This news release contains "forward-looking statements" within the meaning of applicable securitieslaws,includingstatementsregardingtheexplorationanddevelopmentpotentialof the Lake Zone extension (Björkdal).Readersarecautionednotto place undue reliance on forward-looking statements. Actual results and developments may differ materially from those contemplated by these statements depending on, among other things,changesincommoditypricesandgeneralmarketandeconomicconditions.Thefactors identifiedabovearenotintendedtorepresentacompletelistofthefactorsthatcouldaffect Mandalay.Adescriptionofadditionalrisksthatcouldresultinactualresultsanddevelopments differingfromthosecontemplatedbyforward-lookingstatementsinthisnewsreleasecanbe foundundertheheading“RiskFactors”inMandalay’sannualinformationformdatedMarch 30, 2020, a copy of which is available under Mandalay’s profile at www.sedar.com. In addition, there can be no assurance that any inferred resources that are discovered as a result of additionaldrillingwilleverbeupgradedtoprovenorprobablereserves.AlthoughMandalayhas attempted to identify important factors that could cause actual actions, events or results to differmateriallyfromthosedescribedinforward-lookingstatements,theremaybeotherfactors thatcauseactions,eventsorresultsnottobeasanticipated,estimatedorintended.Therecan be no assurance that forward-looking statements will prove to be accurate, as actual results andfutureeventscoulddiffermateriallyfromthoseanticipatedinsuchstatements.Accordingly, readersshouldnotplaceunduerelianceonforward-lookingstatements.

Appendix

Table 1. Björkdal Deeps Significant Drilling Composites

Drill Hole ID		From (m)	To (m)	Drill Width (m)	True Width (m)	Au Grade (g/t)	Au (g/t) over min. 3m mining width
MU20-019		65.70	66.40	0.70	0.50	5.4	0.9
MU20-019		392.00	393.60	1.60	1.42	1.5	0.7
MU20-020A		39.45	39.80	0.35	0.25	8.8	0.7
MU20-020A		49.50	50.50	1.00	0.66	1.9	0.4
MU20-020A		62.40	63.00	0.60	0.26	2.9	0.3
MU20-020A		137.80	138.15	0.35	0.29	2.4	0.2
MU20-020A		155.95	156.25	0.30	0.14	9.3	0.4
MU20-020A		225.65	227.00	1.35	1.07	11.3	4.0
MU20-020A		271.50	271.80	0.30	0.17	4.1	0.2
MU20-020A		339.60	346.05	6.45	2.77	1.7	1.6
MU20-020A		351.60	352.10	0.50	0.23	5.7	0.4
MU20-021		56.00	56.70	0.70	0.54	1.8	0.3
MU20-021		70.00	71.20	1.20	1.06	2.4	0.9
MU20-021		186.60	187.30	0.70	0.50	16.7	2.8
MU20-021		201.45	204.00	2.55	2.28	5.4	4.1
MU20-021		248.20	250.00	1.80	1.10	32.5	11.9
MU20-021		283.65	284.00	0.35	0.27	2.8	0.3
MU20-021		293.55	297.70	4.15	4.08	5.2	5.2
MU20-021		314.20	316.00	1.80	1.23	3.1	1.3
MU20-021		354.60	355.10	0.50	0.40	92.2	12.3
MU20-021		396.95	397.30	0.35	0.23	17.4	1.3
MU20-022		62.20	63.40	1.20	0.72	6.3	1.5
MU20-022		149.50	149.90	0.40	0.15	4.8	0.2
MU20-022		208.30	209.80	1.50	1.11	16.4	6.1
MU20-022		243.40	244.00	0.60	0.22	2.9	0.2
MU20-022		286.40	286.70	0.30	0.19	4.4	0.3
MU20-022		369.80	370.50	0.70	0.45	8.0	1.2
MU20-023		12.55	13.25	0.70	0.45	4.4	0.7
MU20-023		54.10	54.75	0.65	0.27	6.8	0.6
MU20-023		106.55	107.65	1.10	0.73	10.9	2.7
MU20-023		114.05	114.70	0.65	0.44	119.2	17.5
MU20-023		129.30	129.70	0.40	0.29	45.6	4.4
MU20-023		175.65	175.95	0.30	0.19	4.2	0.3
MU20-023		241.90	242.30	0.40	0.21	7.6	0.5
MU20-024		29.90	30.65	0.75	0.51	25.3	4.3
MU20-024		54.50	54.85	0.35	0.18	9.6	0.6
MU20-024		61.75	62.35	0.60	0.25	36.7	3.1
MU20-024		188.60	195.30	6.70	5.01	3.4	3.4
MU20-025		106.55	107.25	0.70	0.32	58.5	6.2
MU20-025		122.60	122.90	0.30	0.23	3.2	0.2
MU20-025		326.40	326.80	0.40	0.24	17.4	1.4
MU20-037		161.90	162.20	0.30	0.21	4.4	0.3
MU20-037		203.35	203.70	0.35	0.23	2.6	0.2
MU20-037		326.50	326.90	0.40	0.24	4.6	0.4
MU20-038		93.10	94.90	1.80	1.23	2.9	1.2
MU20-038		99.40	99.80	0.40	0.25	5.5	0.5
MU20-038		131.00	131.60	0.60	0.42	1.6	0.2
MU20-038		175.00	176.00	1.00	0.73	14.6	3.6
MU20-038		321.40	321.70	0.30	0.14	18.6	0.9

Notes

1. Where True widths are greater than 3 m, grades are not diluted and are presented as the grade over the composite true width.
2. Composites that are below 0.2 g/t Au when diluted to 3 m are not reported in this table.

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