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Tres-Or Announces Findings of Guigues Pipe Historical Work Re-Examination, Details of Proposed 2019 Drilling and Modern Microdiamond Testing Programs, and Reports that it is in Discussions Regarding the Optioning of its Fontana Gold Project

Exploration Programs

Tres-Or Announces Findings of Guigues Pipe

Historical Work Re-Examination, Details of

Proposed 2019 Drilling and Modern

Microdiamond Testing Programs, and Reports

that it is in Discussions Regarding the

Optioning of its Fontana Gold Project

VANCOUVER

,

May 28, 2019

/CNW/ - Tres-Or Resources Ltd. ("

Tres-Or

" or the "

Company

")

(

TSXV: TRS, OTCPK: TRSFF

) is pleased to announce that an extensive re-examination was

recently conducted regarding the nature and extent of historical work on the Company's 100%

owned

Guigues

kimberlite pipe near

Notre-Dame-du-Nord

, Québec (the "

Guigues Pipe

"). As

detailed in this news release, a re-examination of the historical work from the early 1990s has

concluded that work performed by a previous operator should be considered either fatally flawed or

be heavily-discounted. This work comprised a 2 to 3 tonne RC sample at a time in 1992 just after

the first discovery of diamonds in northern

Canada

, when no consistent methods, procedures and

protocols were widely known for use in the rapidly developing diamond exploration industry in

Canada

. The Company is also providing a comprehensive summary of its proposed 2019 Guigues

Pipe exploration program.

The Company also reports that it is currently in confidential discussions with an exploration company

to option its gold project near

Amos

, Québec (the "

Fontana Gold Project

"). There are no

assurances that these discussions will result in a final agreement and updates on the discussions will

be reported as required. All dollar amounts are in Canadian dollars.

A re-examination of the Guigues Pipe has concluded that the work completed in the early 1990s

by a previous operator has been reported incorrectly in numerous published sources including

the

Northern Miner

and government publications as detailed below. No reports by the operator

were made public.

No industry-accepted methods were used for drilling or sampling at the Guigues Pipe as

consistent methods, procedures and protocols did not yet exist in the rapidly developing

diamond exploration industry in

Canada

in 1992.

No samples from this work were processed or analyzed at an independent microdiamond

testing facility.

Accordingly, the results of the previous operator should be considered either fatally flawed or

be heavily-discounted.

The next logical step is to properly assess the Guigues Pipe.

$440,000

proposed 2019 exploration program for the purpose of collecting core samples for

modern microdiamond testing of the Guigues Pipe, which has never been done.

Additional

$239,000

proposed exploration expenditures to develop two other high-priority

kimberlite pipe targets to collect core samples for microdiamond testing.

The Company is also in confidential discussions to option its Fontana Gold Project; however,

there are no assurances that these discussions will result in a final agreement.

The Company has posted a new investor presentation regarding the Guigues Pipe on its website's

landing page (

www.tres-or.com

).

Why is the Work on the Guigues Pipe from the Early 1990s Fatally Flawed?

The Guigues Pipe was discovered in 1983 by De Beers before their discovery of the Victor

kimberlite pipe near

Attawapiskat

in northern

Ontario

in 1987, and before DiaMet Minerals Ltd.'s

1991 discovery of what is now the Ekati Diamond Mine in the

Northwest Territories; Canada's

first

diamond mine. The discovery of economic diamond concentrations in northern

Canada

helped

promote the previously under-recognized importance of eclogite garnets with diamond inclusion

compositions for diamond exploration; an importance that has received industry-wide recognition

over the past decade.

De Beers' claims lapsed in 1989 on the Guigues Pipe and the area was staked by another operator.

At that point in time, the appropriate methods for drilling, collecting samples, processing samples,

and analyzing samples for microdiamonds were generally closely guarded industry secrets. This

operator drilled three reverse-circulation ("

RC

") drill holes into the northern lobe of the Guigues Pipe.

None of this historical test work has been officially reported, and no assessment work reports were

filed. Based upon new information recently reported to the Company, descriptions of the test work

that have made it into the public record are now confirmed to have been incorrect. For example, only

2 to 3 tonnes were collected from the three RC drill holes, rather than the erroneously reported 23

tonnes as printed in the

Northern Miner

on

April 5, 1993

, and later cited in Dr.

Ron Sage's

seminal

1996 report for the Ontario Geological Survey.

In addition, RC drilling is not the industry-accepted method to collect samples for microdiamond

testing and no microdiamond tests were made. Independent modern microdiamond testing facilities

were not readily available in

Canada

at the time.

Despite not yet having industry-accepted drilling, sampling, and processing methods to apply, the

fact that the

Northern Miner

also reported the 1992 test did recover a colourless 2mm x 1mm x

0.5mm macrodiamond from the Guigues Pipe, in the same

April 5, 1993

article, is encouraging. If

correct, the recovery of a macrodiamond would be a positive indicator for the project as it would

support the view that the Guigues Pipe may be diamondiferous.

Furthermore, the RC drill holes were limited to the northern lobe of the Guigues Pipe, which is less

prospective relative to the central and southern portions of the pipe as suggested by Dr.

Cookenboo's 2010 analysis, which is described in detail in the section below titled, "Why are the

Guigues Pipe and Surrounding Targets Prospective?". For context, the Guigues Pipe covers an area

of approximately seven hectares based upon ground magnetics, which is equivalent to the surface

area of about 15 football fields.

Consistent with its prior disclosure, Tres-Or strongly believes that historic work on the Guigues Pipe

from the early 1990s is fundamentally flawed and should therefore be either disregarded or heavily

discounted, and the Company continues to hold the opinion that the Guigues Pipe is highly

prospective for diamonds.

As a result, the Company intends to use industry-standard drilling and sampling techniques to collect

core samples from the most prospective areas of the Guigues Pipe for the first microdiamond

testing at an independent and modern microdiamond testing facility.

Proposed 2019 Guigues Project Exploration Program

The Company plans to drill its 100% owned Guigues Pipe in 2019. The primary purpose of the drill

program is to collect core samples for modern microdiamond testing, which has never been done on

the property before. The Company also plans to conduct targeted exploration activities in the vicinity

of the Guigues Pipe and also expects to drill two of these suspected kimberlite pipes to collect

samples for microdiamond and indicator mineral testing.

Given the recovery of encouraging quantities of eclogite garnets with diamond inclusion

compositions, and the potential for high-quality diamonds as suggested by production from the Victor

Mine within the same geological trend, Tres-Or strongly believes the Guigues Pipe merits direct

testing for microdiamonds at a modern independent Canadian microdiamond laboratory. The budget

for this part of the 2019 Guigues Pipe exploration program is approximately

$440,000

, including a

10% contingency. The Company anticipates that this drilling program will commence near the end of

the third quarter and that the microdiamond testing results will be available near the end of the year.

This summer, the Company also plans to commence a comprehensive exploration program at its

Guigues Project. The goal of this phase of the exploration program is to quickly conduct a regional

surface till sampling program for indicator minerals over the high-priority anomalies near the Guigues

Pipe that were identified from the Company's 2015 helicopter-borne Mag-EM survey. The results of

this work will be used to prioritize targets for follow-up sampling to confirm the presence of

kimberlite, and to provide core samples for indicator mineral compositions by electron microprobe

analysis. The budget for this first phase of the 2019 exploration program is approximately

$63,000

,

including a 10% contingency.

Near the end of the third calendar quarter, the Company also plans to drill 150-metre core drill holes

into the two high-priority exploration targets generated from the summer exploration program

described above, which will provide samples for modern microdiamond testing. The budget for this

second phase of the 2019 exploration program is approximately

$176,000

, including a 10%

contingency. The Company plans to drill-test additional high-priority exploration targets in 2020.

The total 2019 Guigues Project exploration program budget is approximately

$679,000

, including a

10% contingency. It is expected that these expenditures will be classified as eligible expenditures for

Québec flow-through.

Please refer to the Company website (

www.tres-or.com

) for an updated presentation on its Guigues

Project.

Why are the Guigues Pipe and Surrounding Targets Prospective?

The Guigues Pipe is part of Tres-Or's 100% owned Guigues Project and is only subject to a 2%

royalty. The Guigues Pipe is located approximately 10 kilometres east of

Notre-Dame-du-Nord

,

Québec.

Notre-Dame-du-Nord

is located where the Ontario River feeds into the northern limits of

Lake Timiskaming, a large lake that straddles the provincial boundary between

Ontario

and Québec.

The Guigues Project is in close proximity to infrastructure, including paved roads, electrical power

lines, a hydroelectric power dam, and modern telecommunications. The infrastructure near the

Guigues Project site contrasts significantly with most other diamond project sites in

Canada

, which

are principally remote fly-in/fly-out sites. As a result of being in close proximity to infrastructure,

exploration costs are relatively lower and the investment economic hurdles for a potential mine

development in the

Notre-Dame-du-Nord

region is expected to be substantially lower relative to fly-

in/fly-out mines.

The Lake Timiskaming region has a long history of mining. Exploration for diamonds in the vicinity

began when the legendary 800-carat Nipissing Yellow Diamond was found during the development

of the silver mines in

Cobalt, Ontario

, sometime between 1903 and 1905. The Nipissing Yellow

Diamond was cut into eight smaller diamonds, but the source of this goose egg-sized diamond has

not yet been determined.

The Guigues Pipe was discovered in 1983 by De Beers before their 1987 discovery of the Victor

kimberlite pipe near

Attawapiskat

in northern

Ontario

(the "

Victor Pipe

"), and before DiaMet

Minerals Ltd.'s 1991 discovery of what is now the Ekati Diamond Mine in the

Northwest Territories;

Canada's

first diamond mine. The discovery of economic diamond concentrations in northern

Canada

helped promote the previously under-recognized importance of eclogite garnets with diamond

inclusion compositions for diamond exploration; an importance that has only received industry-wide

recognition over the past decade.

The

Guigues

claims lapsed on De Beers in 1989, well before De Beers decided to reassess the

Victor Pipe in the late 1990s following the recognition of the importance of eclogite garnets with

diamond inclusion compositions. After more intense testing, including assessment for eclogite

garnets and modern microdiamond testing, De Beers eventually developed the Victor Pipe into

Ontario's

first and only diamond mine.

In 2003, Tres-Or acquired the Guigues Pipe's encompassing claims as part of a strategic 147-claim

package transaction. Tres-Or systematically explored its extensive land package, which it believed

was prospective for diamondiferous kimberlite pipes. Within a few short years, Tres-Or discovered

several kimberlite pipes, including the massive 21-hectare Lapointe kimberlite pipe in 2005, which

sparked a large staking rush in the area. The Lapointe kimberlite pipe led to a flurry of exploration

deals with several partners exploring Tres-Or's land package under option agreements, but the

Company never optioned the Guigues Pipe as field work has always pointed back to it.

In the wake of the 2008 Great Financial Crisis, the Company's plans to properly test the Guigues

Pipe with modern microdiamond testing methods were put on hold as the interests of exploration-

orientated investors shifted to gold projects at that time. As a result, Tres-Or added gold exploration

properties in the Abitibi region of Québec to its portfolio but continued to slowly advance the Guigues

Pipe when it was afforded the opportunity.

In late 2009, Tres-Or and Dr.

Harrison Cookenboo

, a globally-recognized diamond exploration

expert and a Senior Associate Geologist at Watts, Griffis and McOuat Ltd. ("

WGM

"), collected

small samples from five locations near the top of the Guigues Pipe for kimberlite indicator mineral

analyses. Dr. Cookenboo and Tres-Or completed electron microprobe analyses at the

University of

British Columbia

("

UBC

") that characterized and quantified the presence of kimberlite and diamond

indicator minerals.

Dr. Cookenboo's work identified the presence of diamond inclusion composition eclogite garnets,

chromite and chrome diopside, as well as other important kimberlite indicator minerals such as

chromium-pyrope ("Cr-pyrope"), forsteritic olivine, and magnesium-ilmenite ("Mg-ilmenite"). The

eclogite garnets with diamond inclusion compositions are of especially high priority and point to

important diamond potential in kimberlite pipes; an importance that has received industry-wide

recognition over the past decade (Duffett and Cookenboo, 2010; Assessment Report on the RC Drill

Program for Recovery and Analysis of Kimberlite Indicator Minerals, Guigues Kimberlite Pipe, for

Tres-Or Resources Ltd.; filed with, and available from, the Québec government).

Further, the recovery of eclogite garnets with diamond inclusion compositions from the Guigues Pipe

highlights the potential for high-quality diamonds. It is especially encouraging as it points to potential

similarities to eclogite and lherzolite garnets from De Beer's Victor diamond mine and Metalex's U2

pipe (60 km west of Victor), both located within the same Superior Craton and along the same Mid-

Continent Rift, as detailed recently in Stachel

et al.,

2017 ("The Victor Diamond Mine"; 11

th

IKC

Extended Abstracts; and Metalex Ventures Ltd. news release dated

April 1, 2009

as available on

www.sedar.com

.)

In early 2015, the results of Dr. Cookenboo's and UBC's analyses on the Guigues Pipe were re-

analyzed by Dr.

Charles Fipke's

C.F. Minerals Research Ltd. ("

CFM

") laboratory. CFM provided the

Company with a diamond indicator classification that affirmed the presence of highly encouraging

quantities and classifications of numerous eclogite garnets with diamond inclusion ("

DI

"), probable DI

compositions, and

possible

DI compositions, as well as other important diamond indicator minerals.

A summary of the CFM diamond indicator classification results is presented in the following table:

CFM Laboratory Classification

(1)

Diamond Associated Compositions

EG: 7 DI + 12 prob. DI + 18

possible

DI

PY G-11: 5 DI

OLV: 23 of 74 DI or DI overlap

CHR: 1 DI

(1)

DI = Diamond Inclusions

Historical results discussed above regarding Tres-Or's sampling and subsequent microprobe

indicator mineral analysis on the Guigues Kimberlite in 2009 were verified by the use of appropriate

standards and procedures at the independent laboratory Overburden Drilling Management ("

ODM

")

and UBC, under the supervision of H. Cookenboo, Qualified Person as defined in NI43-101, who also

approved this news release. Interpretations of diamond prospectivity were further verified by re-

classification of the microprobe data at CFM, and by comparison to published data regarding the

Victor Diamond Mine and U2 kimberlite pipe, as described in the text.

Verification that the results of the 2 to 3 tonne test at

Guigues

in 1992 were erroneously reported in

the

Northern Miner

and elsewhere is based upon recent conversations by Tres-Or (including L.

Duffett, President and P.Geo, who approved this news release) with a participant in the work during

1992 and the lack of apparent residue at the site that would be consistent with a 23-tonne sample

being extracted. Tres-Or cannot verify this information more confidently, given the limits imposed by

length of time passed, except by completing work as in the recommended 2019 drilling and

microdiamond testing program.

Fontana Gold Project Update

With respect to Tres-Or's gold projects, which encompass about 200 contiguous claims on the

Québec side of the Abitibi Greenstone Belt (the "

Fontana Gold Project

"), the Company believes

that it has sufficiently advanced these properties to attract a strong option partner with the

necessary technical skills to develop them further.

Tres-Or is currently in confidential discussions with a technically-strong private exploration company

to option the Fontana Gold Project. Although Tres-Or is optimistic, there are no assurances that

these discussions will result in an option agreement. The Company will provide an update on the

discussions as required.

About Tres-Or Resources Ltd.

Tres-Or Resources Ltd. is a Canadian resource company focused on exploring for diamonds and

gold resources in the Témiscamingue and Abitibi regions of Québec that is listed on the TSX Venture

Exchange under the trading symbol "TRS". Additional information related to the Company is available

on SEDAR and on the Company's website (

www.tres-or.com

).

On behalf of the Board of Directors

"Laura Lee Duffett"

Laura Lee Duffett

, P.Geo.

President and CEO

Neither the TSX Venture Exchange nor its Regulation Service Provider (as the term is

defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy

or accuracy of this news release.

Qualified Persons

Disclosure of a scientific or technical nature related to the Company's projects and exploration

activities in this news release was prepared under the supervision of Dr.

Harrison O. Cookenboo

,

B.Sc., M.Sc., Ph.D., P.Geo., the Company's independent Qualified Person (as such term is defined

in

National Instrument 43-101

), and Ms.

Laura Lee Duffett

, P.Geo., the Company's President and

CEO, who is a non-independent Qualified Person, both of whom have reviewed and approved the

technical and scientific portions of this presentation. Portions of the information are based on

assumptions, qualifications, and procedures that may not be fully described herein and for which

there may be no supporting technical report prepared in accordance with

National Instrument 43-

101.

Forward-Looking Statements

This news release contains projections and forward-looking information that involve various risks and

uncertainties, including, without limitation, statements regarding the potential extent of mineralization,

resources, reserves, exploration results and plans and objectives of the Company. These risks and

uncertainties include, but are not restricted to, the early stage development of the Company and its

projects; general business, economic, competitive, political and social uncertainties; capital market

conditions and market prices for securities, junior market securities and mining exploration company

securities; commodity prices, the amount of geological data available, the uncertain reliability of

drilling results and geophysical and geological data and the interpretation thereof and the need for

adequate financing for future exploration and development efforts. There can be no assurance that

such statements will prove to be accurate. Actual results and future events could differ materially

from those anticipated in such statements. These and all subsequent written and oral forward-

looking statements are based on the estimates and opinions of management on the dates they are

made and are expressly qualified in their entirety by this notice. The Company assumes no obligation

to update forward-looking statements should circumstances or management's estimates or opinions

change.

SOURCE

Tres-Or Resources Ltd.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/May2019/28/c9705.html

%SEDAR: 00008208E

For further information:

Laura Lee Duffett, President & CEO: +1 (604) 541-8376 - info@tres-

or.com; David Vinokurov, Sniper Capital Corp: +1 (416) 716-9281 - [email protected],

Website: www.tres-or.com

CO: Tres-Or Resources Ltd.

CNW 09:05e 28-MAY-19