RJK’s Receives 12.2 Tonne Sample Results, Yields Similarities to Lherzolitic Kimberlite Diamond Mines Hosting Large Diamonds

P.O. Box 1053, 4 Al Wende Avenue, Kirkland Lake, ON P2N 3L1 Tel: (705) 568-7956

“Searching for the Source of the 800 Carat Nipissing Diamond”

RJK’s Receives 12.2 Tonne Sample Results, Yields Similarities to Lherzolitic Kimberlite Diamond Mines

Hosting Large Diamonds

Kirkland Lake, Ontario – November 3, 2021 – RJK Explorations Ltd (“RJK” or “the Company'') (TSX-V: RJX.A,

US OTC: RJKAF) has received results from CF Mineral Research in Kelowna BC, from seven large-tonnage, on-

surface kimberlite discoveries. Kimberlite samples totalling 12.2 tonnes combined were tested to determine

the variability of the geochemistry, to develop preliminary comparisons to other kimberlite fields, and to

determine the most promising locations suitable for excavating large tonnage bulk samples. RJK is pleased to

report that CF Mineral Research confirms t he Lorrain Twp. kimberlite discoveries host lherzolite -type

kimberlite where large diamonds (50 carats+) are typically found. The unique geological setting presents the

availability of unconsolidated near -surface kimberlite material that is amenable to ex ceptional low cost

processing wherein minimum 50 tonne bulk samples, from multiple locations, can be used to determine the

large diamond potential.

Synopsis

The indicator mineral geochemistry from all 7 kimberlite bodies indicates the kimberlite magma ha s

incorporated lherzolitic peridotite enriched in olivine, orthopyroxene along with chromium and aluminum

spinels and garnets. This region at the base of the lithosphere and upper mantle is conducive for the growth

of large diamonds in the diamond stability field at depths of 150 km to 200 km. The high temperature ilmenite

peridotites contain megacrysts favouring larger diamond overgrowths forming at temperatures ranging from

1200 Co to 1400 Co. The proto-kimberlite magma indicates an origin of deeper levels in the upper mantle as

down to the Transition Zone, from 200 km to 400+ km, based on preliminary whole rock analysis . Samples

taken from RC 4 RC drill holes from the Paradis, Robin’s Place, Gleeson and HSM kimberlites returned average

“Searching for the Source of the 800 Carat Nipissing Diamond”

Web Site: http://www.rjkexplorations.com

compositions as follows: SiO 2: 46.8%, CaO: 16.9%, Al 2O3: 8.8%, Fe 2O3: 3.2%, K 2O: 1.9%, MgO: 4.3%. Na 2O:

1.9%, Cr2O3: .04%, Mn2O3: .06%, TiO2: .29%.

Visual Model Explanation:

Source: Oceanic and super‑deep continental diamonds share a transition zone origin and mantle plume

transportation; Luc S. Doucet, Zheng‑Xiang Li & Hamed Gamal El Dien; www.nature.com/scientificreports/

published on-line: Aug 20,2021; modified by RJK Expl Geology

Oceanic and super-deep continental diamonds form in the mantle transition zone using subducted carbon,

and brought to the lithospheric levels by mantle plumes. Lithospheric Diamonds and Diamonds of Mixed

Origin (as rims over the super-deep diamonds) develop in the continental lithosphere. Geochemistry of RJK’s

KIMs suggest possible origins as deep as the transition zone, based on temperature and pressure lab

determinations. High quantities of olivine silicates suggest a very deep magma source, arguably where large

diamonds originate.

Comparisons

Dr. Charles E. Fipke previously stated RJK’s Paradis Kimberlite hosts diamond inclusion lherzolite indicators

such as those contained at the Victor diamond mine in Ontario and other diamond mines in Lesotho and

elsewhere. This statement was also true for surrounding kimberlites, with emphasis on the Nicol Kimberlite

body. The picro-ilmenite plots show similarities to the Yakutia Kimberlite Fields in Siberia showing peridotite

magma affinity. Cr-poor ilmenites (0.04 to 0.23 wt%Cr2O3; 9.7 to 11.3 wt% MgO) occur as intergrowths with

type II diamonds, and the Lorrain Kimberlite Field ilmenite plots display these same ranges. Comparisons

P.O. Box 1053, 4 Al Wende Avenue, Kirkland Lake, ON P2N 3L1 Tel: (705) 568-7956

“Searching for the Source of the 800 Carat Nipissing Diamond”

were also made to De Beers Victor Lherzolite Diamond Mine, which was unique in its che mistry, yielding

exceptional quality diamonds, but also hosting very few microdiamonds. Victor lherzolitic garnet inclusions

have unusually high MnO contents, with 88% exceeding the MnO cut -off >.36 weight% MnO for diamond

facies garnets. (Refer to following histograms). The Lorrain Twp. kimberlite results suggest a certain level of

diamond resorption (especially for any smaller stones), the kimberlite magma also has experienced a

reducing environment conducive for diamond preservation based on picro-ilmenite geochemistry. The picro-

ilmenite plots from the Lorrain Twp. kimberlites compare favourably with the Yakutia kimberlite field plots

depicted in the Geotechnical Discussion.

Source: RJK Expl Geology

“Searching for the Source of the 800 Carat Nipissing Diamond”

Web Site: http://www.rjkexplorations.com

Source: The Victor Mine (Superior Craton, Canada): Neoproterozoic lherzolitic diamonds from a thermally -

modified cratonic root; T. Stachel et al; Article in Mineralogy and Petrology · May 2018

Geotechnical Discussion

Dr Charles Fipke's lab, CF Mineral Research in Kelowna BC and Microlithics in Thunder Bay Ontario processed

12.2 tonnes of kimberlite recovered by bulk sampling, diamond drill coring and reverse circulation drilling

methods from 7 kimberlite bodies over 10 months. A summary of kimberlite indicator mineral and diamond

results are presented below:

Paradis Pond and Beaver Dam

From 156 kgs of drill core, samples were selected from 4 drill holes (PP-20-03,04,08,09) and were processed

by CFM for a concentrate weight of 341 g from which 179g were picked. A total of 1,914 grains were picked

and 283 grains probed and classified into 6 diamond indicator minerals: 18 we re diamond inclusion

olivine/forsterite; 2 were G9 eclogitic garnets believed to originate between 150 km to 200 km depths; 8

were diamond inclusion clinopyroxenes; 17 kimberlite chromites including 7 high titanium chromites, 10

were G10 peridotitic garnet s; 2 were diamond inclusion G11 garnets, Of importance is that 18

P.O. Box 1053, 4 Al Wende Avenue, Kirkland Lake, ON P2N 3L1 Tel: (705) 568-7956

“Searching for the Source of the 800 Carat Nipissing Diamond”

olivine/forsterite grains classify in all diamond inclusion fields and 2 G9 eclogitic and 16 high pressure

megacrystic garnets are associated with diamond formation at depths of about 200 km or more. A total of 5

microdiamonds were recovered and all stones are described as: natural, white, chip with adamantine lustre,

very strong colour emission with no inclusions. One diamond from holes PP -20-03/04 is described as an

irregular crystal with fractured surface, weakly yellow with adamantine lustre, very strong colour emission

with no inclusions. Of particular significance is the diamond bearing Paradis kimberlite may have originated

in the upper mantle passing through both group 1 and group 2 e clogitic magma fields and therefore can

assimilate both group 1 and group 2 eclogitic clinopyroxenes and garnets.

A 16 hole RC drilling campaign was initiated in the vicinity of drill hole PP -20-04 using a 16 m x 16 m testing

array. RC drilling using 3.5” rod diameter recovered 1,070 kg which was processed by Microlithics using their

DMS plant. A 36 kg concentrate was produced and then fired in a caustic fusion process to recover diamonds.

No diamonds were recovered but note, that given the size of the micr odiamonds discovered in the

Company’s diamond drill core, the possibility exists that microdiamonds were lost in the RC drilling process

which extracts the cuttings through a 1” annulus inside the rods.

Paradis Dam

From A 864 kg RC samples, 717 g of heavy mineral concentrates were then picked for a weight of 179 g , of

which 1,311 grains were picked and 243 grains probed and classified into 6 diamond indicator minerals: 2

were diamond inclusion olivine forsterites, 3 were G9 eclogitic garne ts, 1 was a diamond inclusion G11 -1

garnet, and 1 was a diamond inclusion chromite, all formed in the diamond stability field along with the

diamonds. There were no microdiamonds recovered from the 864 kg RC drilling sample. Analysis of the 1,267

picro-ilmenite microcrysts indicate reducing conditions suitable for diamond preservation in the magmas of

kimberlite and lamproite affinity with crystallization temperatures ranging from 669 Co to 1411 Co.

“Searching for the Source of the 800 Carat Nipissing Diamond”

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Nicol

From a 56 kg RC sample, a picking weight from 670 g of heavy mineral concentrates, 3,386 grains were picked

and 171 grains probed and classified into 6 diamond indicator minerals: 14 were diamond inclusion olivine

forsterites, 5 were G10-2 peridotitic garnets, 1 was a diamond inclusion G11 garnet, 4 were diamond inclusion

clinopyroxenes and 5 were diamond inclusion chromites, all formed in the diamond stability field along with

the diamonds. There were no microdiamonds recovered from the 56 kg RC drilling sample.

Nicol’s Forsterite megacrysts suggest a very deep source, based on the Mg vs. Fe content of the olivine.

Analysis of the 102 picro-ilmenite microcrysts indicate reducing conditions suitable for diamond preservation

in the magmas of kimberlite and lamproite affinity with crystallization temperatures ranging from 1174 Co to

1318 Co. Refer to attached Cr2O3 / MgO plot

Source: CFM Mineral Research

P.O. Box 1053, 4 Al Wende Avenue, Kirkland Lake, ON P2N 3L1 Tel: (705) 568-7956

“Searching for the Source of the 800 Carat Nipissing Diamond”

Gleeson

A 1,536 kg RC sample was processebd by Microlithics and a 54 kg core sample by CFM, for a a picking weight

from 157 g of heavy mineral concentrates, 1,412 grains were picked and 193 probed and classified into 6

diamond indicator minerals: 8 were diamond inclusion olivine forsterites, 3 were G9 eclogitic garnets, 4 were

diamond inclusion clinopyroxenes and 2 were diamond inclusion chromites, all formed in the diamond

stability field along with the diamonds. There were 3 (.106 microns} microdiamonds recovered from the 54

kg drill core sample. Analysis of the 64 picro -ilmenite microcrysts indicate reducing conditio ns suitable for

diamond preservation in the magmas of kimberlite and lamproite affinity with crystallization temperatures

ranging from 669 Co.to 1411 Co. Refer to attached Cr2O3 / MgO plot.

A 20 hole RC drilling campaign was initiated over the Gleeson cond uctance anomaly utilizing a N/S and E/W

drill fence array with 200 m spacing between holes. RC drilling using 3.5” rod diameter recovered 1,509 kg

which was processed by Microlithics using their DMS plant. A 31 kg concentrate was produced and then fired

in a caustic fusion process to recover diamonds. No diamonds were recovered.

“Searching for the Source of the 800 Carat Nipissing Diamond”

Web Site: http://www.rjkexplorations.com

Source: CFM Mineral Research

Robin’s Place

A 1,119.7 kg RC sample was processed at Microlithics to a concentrate along with a 26 kg core sample by

CFM for a picking weight of 104 g of heavy mineral concentrates. 1,673 grains were picked and 142 grains

probed and classified into 6 diamond indicator minerals, 1 was a G9 eclogitic garnet, 10 were diamo nd

inclusion clinopyroxenes, all formed in the diamond stability field along with the diamonds. There were 2

(.106 microns} microdiamonds recovered from the 26 kg drill core sample. Analysis of the 48 picro-ilmenite

microcrysts indicate reducing conditions suitable for diamond preservation in the magmas of kimberlite and

lamproite affinity with crystallization temperatures ranging from 788 Co.to 1098 Co. Refer to attached Cr2O3

/ MgO plot.

A 6 hole RC drilling campaign was initiated over the Robin’s Place conductance anomaly utilizing a N/S and

E/W drill fence array with 200 m spacing between holes. RC drilling using 3.5” rod diameter recovered 1,131