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Frontier Intersects 330.7 Metres of High-Grade Lithium Averaging 1.79% LI2O over a Horizontal Distance of 120 Metres

Drill Results

FRONTIER INTERSECTS 330.7 METRES OF

HIGH-GRADE LITHIUM AVERAGING 1.79%

LI2O OVER A HORIZONTAL DISTANCE OF 120

METRES

SUDBURY, ON

,

Sept. 20, 2022

/CNW/ - Frontier Lithium Inc. (TSXV: FL) (FRA: HL2) (OTCQX:

LITOF) ("Frontier" or "the Company") is pleased to announce the results for five additional drill holes

completed during the Phase XII drill program on the Spark pegmatite which began in

May 2022

and

is currently in progress. The initial drill holes were designed to convert inferred material to the

indicated category for the planned open pit. The Spark pegmatite is one of the two delineated

premium spodumene-bearing lithium deposits on the PAK Lithium Project.

Howard and Sam from Sandy Lake First Nation in front of drill core from Spark deposit. (CNW

Group/Frontier Lithium Inc.)

Highlights

Phase XII delineation and infill drilling with two drill rigs is currently being conducted, whereby,

the Company has completed

11,150m

of drilling in 34 holes as of

September 11, 2022

.

Analysis from 5 of the holes have been received and reported herein.

DDH PL-062-22 Intersected a total of

180.8m

of pegmatite averaging 1.55% Li

2

O with thin

sheets of mafic rafts within the pegmatite as expected. Collared north of the Spark Pegmatite

in mafic volcanic, hole was drilled to convert inferred material at depth and to provide a northern

contact of the Spark Pegmatite. Hole was terminated in pegmatite due to time constraints and

will extended later in the program.

Includes

16.9m

from

178.0m

to

194.9m

of 2.19% Li

2

O

DDH PL-066-22 intersected

338.0m

of continuous pegmatite averaging 1.79% Li

2

O. Collared in

pegmatite on the southern end of the Spark orebody, the hole was drilled to convert inferred

material at depth

Includes

14m

zone from

89.0m

to

103.0m

of 2.73% Li

2

O

Includes

14m

zone from

159.0m

to

173.0m

of 2.58% Li

2

O

Includes

24m

zone from

191.0m

to

215.0m

of 2.52% Li

2

O

DDH PL-070-22, PL-071-22 and PL-073-22 were collared proximal to each other and fanned

out to test both the northern upper and southern lower contacts with the mafic host rock. As

expected, they intersected diminishing proportions of pegmatite from west to east with an

increase in mafic rafts towards the east.

PL-070-22 intersected a total of

181.1m

of pegmatite averaging 1.53% Li

2

O

PL-071-22 intersected a total of

107.7m

of pegmatite averaging 1.40% Li

2

O

Includes

5.4m

from 242.6 to

248.0m

averaging 663 ppm Ta

2

O

5

and 1.3% Li

2

O

PL-073-22 intersected a total of

124.5m

of pegmatite averaging 1.38% Li

2

O

Includes

16.0m

from 92.2 to 108.1 averaging 521 ppm Ta

2

O

5

and 1.02% Li

2

O

"We are extremely pleased with the drilling results to date." states

Garth Drever

, V.P. Exploration.

"The infill-drilling continues to be predictable, the pegmatite remains open in all directions and zones

of elevated tantalum and cesium along with lithium are being delineated."

The initial objective for the Phase XII drill program was to focus on converting the inferred resource

within the central portion of the Spark deposit at depth. DDH's PL-062-22 was terminated in

pegmatite and PL-066-22 was ended in mafic volcanics due to PFS time constraints requiring quick

turn-around of analysis. With one month of drilling remaining in the current program, Frontier will

focus on defining the limits of the pegmatite and deepening many of the initial holes that had been

terminated earlier in the program.

Figure 1 is a location map showing the project area including Frontier's land tenure and location of

the three lithium-cesium-tantalum pegmatites.

Figure 1: Location Map showing land tenure and geology

Figure 2 is a plan view showing all drilling with analytical data completed to date with emphasis on

drill hole traces reported in this release.

Figure 2: Planview map of the Spark pegmatite showing drillhole traces

Table 1 details the drill holes with mineralized intersections while Table 2 summarizes all the Phase

XII drill holes reported within and completed up to

September 11, 2022

.

Drill Hole

PL-062-22

Collared north of the Spark Pegmatite in mafic volcanic, PL-062-22 was drilled to convert inferred material at

depth and to provide a northern contact of the Spark Pegmatite. Intersected a total of 180.8m of 1.55%

of Li

2

O and thin sheets of mafic rafts within the pegmatite as expected. Hole was terminated in pegmatite due

to time constraints and will be extended later in the program

Zone

From

(m)

To

(m)

Width

(m)

Li

2

O

(%)

Cs

2

O

(%)

Ta

2

O

5

(ppm)

Nb

2

O

5

(ppm)

SnO

2

(ppm)

Rb

2

O

(%)

Unit

Li-Enriched

120.5

208.9

88.4

1.59

0.03

150

104

64

0.24

Pegmatite, minor mafics

including

178.0

194.9

16.9

2.19

0.02

114

104

33

0.21

Pegmatite

Li-Enriched

222.5

249.0

26.5

1.46

0.02

76

78

116

0.29

Pegmatite

Li-Enriched

294.0

360.0

66.0

1.54

0.02

74

84

38

Aplite, minor mafics

Table 1: Details of Mineralized Intersections

Drill Hole

PL-066-22

Collared in pegmatite on the southern end of the Spark orebody, PL-066-22 was drilled to convert inferred

material at depth. Intersected 330.7m of continuous pegmatite at 1.79% Li

2

O (120m horizontal distance)

Zone

From

(m)

To

(m)

Width

(m)

Li

2

O

(%)

Cs

2

O

(%)

Ta

2

O

5

(ppm)

Nb

2

O

5

(ppm)

SnO

2

(ppm)

Rb

2

O

(%)

Unit

Li-Enriched

12.0

342.7

330.7

1.79

0.02

67

90

38

0.25

Aplite-Pegmatite

including

89.0

103.0

14.0

2.73

0.01

60

83

35

0.20

Aplite, minor pegmatite

including

159.0

173.0

14.0

2.58

0.01

36

75

19

0.19

Aplite, minor pegmatite

including

191.0

215.0

24.0

2.52

0.03

71

73

52

0.28

Aplite, minor pegmatite

Drill Hole

PL-070-22

Was drilled to test both the northern upper and southern lower contacts with the mafic host rock. Intersected

several pegmatitic zones ranging from a few metres to 94m. PL-070-22 intersected a total of 181.1m

of pegmatite averaging 1.53% Li2O

Zone

From

(m)

To

(m)

Width

(m)

Li

2

O

(%)

Cs

2

O

(%)

Ta

2

O

5

(ppm)

Nb

2

O

5

(ppm)

SnO

2

(ppm)

Rb

2

O

(%)

Unit

Li-Enriched

27.7

31.7

4.0

2.24

0.01

98

59

34

0.16

Aplite

Li-Enriched

65.5

69.3

3.8

2.19

0.02

160

63

22

0.24

Pegmatite-aplite

Li-Enriched

112.0

132.4

20.4

1.65

0.03

129

96

69

0.25

Aplite-pegmatite

Li-Enriched

164.4

258.3

93.9

1.57

0.02

151

88

54

0.29

Aplite, minor

mafics

Li-Enriched

323.5

382.5

59.0

1.35

0.01

63

93

49

0.22

Aplite

Drill Hole

PL-071-22

Was collared proximal to PL-070-22 and fanned out to the east to test both the northern upper and southern

lower contacts with the mafic host rock. As expected, intersected diminishing proportions of pegmatite from

west to east with an increase in mafic rafts towards the east. intersected a total of 107.7m of pegmatite

averaging 1.40% Li2O. Includes 5.4m from 242.6 to 248.0m averaging 663 ppm Ta2O5 and 1.3% Li2O

Zone

From

(m)

To

(m)

Width

(m)

Li

2

O

(%)

Cs

2

O

(%)

Ta

2

O

5

(ppm)

Nb

2

O

5

(ppm)

SnO

2

(ppm)

Rb

2

O

(%)

Unit

Li-Enriched

34.4

41.7

7.4

1.89

0.01

159

80

36

0.19

Pegmatite-aplite

Li-Enriched

98.6

132.6

34.0

1.31

0.02

140

55

65

0.18

Pegmatite, minor

mafics

Li-Enriched

153.5

184.0

30.5

1.18

0.02

107

57

70

0.23

Aplite, minor mafics

Li-Enriched

191.0

221.6

30.6

1.62

0.02

118

69

62

0.21

Aplite

Li-Ta-Enriched

242.6

248.0

5.4

1.30

0.02

663

233

151

0.31

Aplite

Drill Hole

PL-073-22

Was collared proximal to PL-070-22 and PL-071-22 and fanned out to the east to test both the northern upper and

southern lower contacts with the mafic host rock. As expected, intersected diminishing proportions of pegmatite

from west to east with an increase in mafic rafts towards the east. intersected a total of 124.5m of pegmatite

averaging 1.38% Li2O

Zone

From

(m)

To

(m)

Width

(m)

Li

2

O

(%)

Cs

2

O

(%)

Ta

2

O

5

(ppm)

Nb

2

O

5

(ppm)

SnO

2

(ppm)

Rb

2

O

(%)

Unit

Li-Enriched

49.2

50.6

1.4

1.58

0.03

154

57

52

0.14

Pegmatite

Li-Ta-Enriched

92.2

108.1

16.0

1.02

0.05

521

92

62

0.22

Aplite-minor mafics

Li-Enriched

116.4

142.4

26.0

1.15

0.04

218

62

64

0.18

Aplite-minor mafics

Li-Enriched

187.3

250.7

63.5

1.65

0.02

193

73

83

0.27

Aplite-minor mafics

Li-Enriched

329.7

347.4

17.7

1.06

0.01

76

38

45

0.19

Aplite-minor mafics

DDHNo

Date Drilled

UTM Zone 15N (NAD83)

Collar

Orient

Metres Drilled

Start

End

Easting

Northing

(mASL)

Azim

Dip

Start

End

Phase XII

PL-057-22

1

2022-05-15

2022-05-17

472,733

5,829,489

355.9

358

-55

0

172.5

PL-058-22

1

2022-05-17

2022-05-23

472,733

5,829,489

355.9

177

-70

0

297.4

PL-059-22

2

2022-05-24

2022-05-28

472,698

5,829,535

356.0

165

-78

0

316

PL-060-22

2

2022-05-27

2022-06-04

472,749

5,829,559

360.0

180

-73

0

360

PL-061-22

2

2022-05-20

2022-05-27

472,773

5,829,561

360.2

178

-65

0

327

PL-062-22

2022-05-28

2022-06-05

472,712

5,829,596

356.2

176

-65

0

360

PL-063-22

1

2022-06-05

2022-06-10

472,746

5,829,539

360.0

187

-70

0

348.5

PL-064-22

1

2022-06-05

2022-06-10

472,712

5,829,596

356.2

141

-65

0

352.5

PL-065-22

2022-06-10

2022-06-22

472,686

5,829,583

354.0

173

-72

0

330.86

PL-066-22

2022-06-12

2022-06-27

472,732

5,829,371

325.0

323

-70

0

365.67

PL-067-22

2022-06-29

2022-07-04

472,778

5,829,383

327.0

315

-70

0

352.5

PL-068-22

2

2022-06-22

2022-06-27

472,790

5,829,540

360.0

171

-55

0

343.5

PL-069-22

2022-07-06

2022-07-15

472,814

5,829,385

326.0

324

-61

0

412.3

PL-070-22

2022-06-28

2022-07-04

472,805

5,829,588

360.0

184

-54

0

405

PL-071-22

2022-07-04

2022-07-15

472,805

5,829,588

360.0

160

-52

0

384.6

PL-072-22

2022-07-15

2022-07-21

472,847

5,829,384

326.0

349

-61

0

386.2

PL-073-22

2022-07-16

2022-07-23

472,816

5,829,589

360.0

146

-52

0

392

PL-074-22

2022-07-28

2022-08-02

472,584

5,829,497

354.0

162

-47

0

403.5

PL-075-22

2022-08-01

2022-08-06

472,571

5,829,490

354.0

177

-47

0

408

PL-076-22

2022-07-25

2022-08-05

472,846

5,829,384

326.0

314

-63

0

438

PL-077-22

2022-08-08

2022-08-24

472,864

5,829,390

326.0

354

-56

0

433.38

PL-077A-22

2022-08-06

2022-08-07

472,871

5,829,377

324.0

335

-65

0

24.6

PL-078-22

2022-08-25

2022-09-01

472,939

5,829,369

326.0

341

-55

0

339.7

PL-079-22

2022-08-06

2022-08-15

472,538

5,829,480

357.0

177

-48

0

417

PL-080-22

2022-08-16

2022-08-23

472,687

5,829,511

354.0

193

-55

0

418.5

PL-081-22

2022-08-24

2022-08-30

472,689

5,829,499

354.0

177

-46

0

367.7

PL-082-22

2022-08-30

2022-09-02

472,718

5,829,455

355.0

6

-61

0

241.5

PL-083-22

2022-09-02

2022-09-06

472,971

5,829,367

326.0

343

-57

0

377.3

PL-084-22

2022-09-07

2022-09-11

472,983

5,829,380

325.0

358

-42

0

327

PL-085-22

2022-09-02

2022-09-05

472,731

5,829,472

354.0

309

-57

0

232

PL-086-22

2022-09-05

2022-09-08

472,731

5,829,472

354.0

162

-46

0

201

PL-087-22

2022-09-08

2022-09-11

472,701

5,829,451

354.0

318

-50

0

213.4

PL-GDH-11-22

2022-07-22

2022-07-24

473,046

5,829,379

325.0

285

-47

0

173.5

Table 2: Summary of Phase XII Drill Program (May to July 4, 2022)

PL-GDH-12-22

2022-07-23

2022-07-25

472,456

5,829,470

358.0

119

-45

0

228

Phase XII is ongoing and scheduled to be completed in September 2022

Total metres drilled

11,150.6

Notes:

1: Reported on Release July 25, 2022

2: Reported on Release August 17 ,2022

Due Diligence

All scientific and technical information in this release has been reviewed and approved by

Garth Drever, P.Geo., the qualified person (QP) under the definitions established by National

Instrument 43-101. Under Frontier's QA/QC procedures, all drilling was completed by Chenier

Drilling Ltd. of

Val Caron, ON

using thin walled BTW drill rods (4.2 cm core diameter) and a Reflex

ACT III oriented core system. Using the Reflex system, the drill core was oriented and marked as it

was retrieved at the drill. The core was boxed and delivered to the Frontier core shack where it was

examined, geologically logged, and marked for sampling. The core was photographed prior to

sampling. Using a rock saw, the marked sample intervals were halved with one-half bagged for

analysis. Sample blanks along with lithium, rubidium and cesium certified reference material was

routinely inserted into the sample stream in accordance with industry recommended practices. Field

duplicate samples were also taken in accordance with industry recommended practices. The

samples were placed in poly sample bags and transported to

Red Lake

by float plane and then

shipped to AGAT Laboratories Ltd. (AGAT) in

Thunder Bay

for sample preparation and to

Mississauga, Ontario

for processing and quantitative multi-element analysis. AGAT is an ISO

accredited laboratory. The core is stored on site at the Pakeagama Lake exploration camp.

About Frontier Lithium

Frontier Lithium is a preproduction business with an objective to become a strategic domestic

supplier of spodumene concentrates for industrial users as well as battery-grade lithium hydroxide

and other chemicals to the growing electric vehicle and energy storage markets in

North America

.

The Company maintains the largest land position and resource in a new premium lithium mineral

district located in

Ontario's

Great Lakes region.

About PAK Lithium Project

The PAK Lithium Project is one of the highest quality known lithium mineral resource in

North

America

due to its high-grade and low impurity properties in the pegmatite ore material and the

spodumene mineral. The Company published a Preliminary Economic Assessment ("PEA") in

April

2021

that indicated an after-tax Net Present Value ("NPV") at an 8% discount rate of US

$974 million

and a 21% after-tax Internal Rate of Return ("IRR") through a fully-integrated lithium operation

utilizing spodumene concentrate generated from the PAK Lithium Project to achieve downstream

conversion for production of battery-quality lithium chemicals and concentrate for the glass and

glass-ceramics market. For details, please refer to the NI 43-101 Technical report by BBA

Engineering Ltd. issued on

April 9, 2021

and filed under the Company's profile on SEDAR on

April

14, 2021

.

Forward-looking Statements

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in

the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of

this release. This release includes certain statements that may be deemed "forward-looking

statements". All statements in this release, other than statements of historical facts, that address

future production, reserve potential, exploration drilling, exploitation activities and events or

developments that the Company expects are forward-looking statements. Although the Company

believes the expectations expressed in such forward-looking statements are based on reasonable

assumptions, such statements are not guarantees of future performance and actual results or

developments may differ materially from those in the forward-looking statements. Factors that could

cause actual results to differ materially from those in forward looking statements include market

prices, exploitation and exploration successes, continued availability of capital and financing, and

general economic, market or business conditions. Investors are cautioned that any such statements

are not guarantees of future performance and those actual results or developments may differ

materially from those projected in the forward-looking statements. For more information on the

Company, Investors should review the Company's registered filings available at

sedar.com

.

SOURCE

Frontier Lithium Inc.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/September2022/20/c5560.html

%SEDAR: 00008434E

For further information:

Bora Ugurgel, Manager, Investor Relations, 2736 Belisle Drive Val Caron,

ON. P3N 1B3 CANADA, T. +001 705.897.7622, F. +001 705.897.7618

CO: Frontier Lithium Inc.

CNW 08:00e 20-SEP-22