2008

Balance Of Assay Results From 2007 Program 24.54 Meters Grading 13.25% Zinc, 2.24% Lead, 17.04 G/T Silver From 100% Owned Akie Property, B.C.


February 21, 2008

Vancouver , B.C. – February 21, 2008 – Mantle Resources Inc. (TSX Venture: MTS; Frankfurt : AOF7E1) (the “Company”) is pleased to announce that the balance of the assay results from the 2007 drill program have been received.  Highlights include: hole A-07-47 (27.07 metres grading 11.46% Zn+Pb); hole A-07-51 (24.54 metres grading 15.49% Zn+Pb) and hole A-07-53 (16.23 metres grading 15.15% Zn+Pb).  With these results, all assays have now been received from the 2007 exploration program on the zinc-lead bearing Cardiac Creek deposit (the “CC Deposit”) at its 100% owned Akie property, in northeastern British Columbia, approximately 260 kilometers north-northwest of the town of Mackenzie.

The tables below summarize the data for the balance of the drill holes at the Cardiac Creek Deposit:

Hole No.

From (m)

To (m)

Interval (m)

Zinc (%)

Lead (%)

Silver (g/t)

Zn+Pb %

A-07-53*

389.50

417.35

27.85

9.70

1.84

16.01

11.54

including

401.12

417.35

16.23

12.72

2.43

19.45

15.15

A-07-52

741.00

744.00

3.00

2.20

0.15

5.70

2.35

A-07-51

463.37

498.98

35.61

10.60

1.80

15.10

12.40

including

472.46

497.00

24.54

13.25

2.24

17.04

15.49

A-07-48

384.57

419.71

35.14

5.86

1.13

9.16

6.99

including

387.37

394.41

7.04

9.10

1.04

7.45

10.14

and

405.26

414.11

8.85

8.07

1.60

14.31

9.67

A-07-47**

353.13

380.20

27.07

9.63

1.83

13.69

11.46

including

360.20

380.20

20.00

11.61

2.25

15.71

13.86

including

368.88

380.20

11.32

13.45

2.48

17.81

15.93

or

356.64

365.70

9.06

10.33

2.06

15.76

12.39

notes
*  A-07-53: there is a 3.14 m wide band of barren shale included in the reported mineralization
** A-07-47: there is a 3.00 m wide band of barren shale included in the reported mineralization


Hole No.

Azimuth (deg)

Dip (deg)

TD (m)

Grid (S)

Grid (W)

Elev (m)

A-07-53

060

-79

460.08

3135

75

1424.0

A-07-52

205

-63

852.00

2941

345 (E)

1424.0

A-07-51

063

-80

513.90

2928

75

1540.0

A-07-48

060

-68

446.84

2928

75

1540.0

A-07-47

055

-72

401.12

3275

55

1433.0

note: A-07-52 was collared from the footwall

For all but hole A-07-52, the true width of the mineralization varies between approximately 66% and 71% of the reported interval, but is subject to revision.

Of the holes reported, two key holes -- A-07-47 and A-07-48 (combined with previously reported hole A-07-49 grading 13.65% Zn+Pb over 20.19 metres) -- further indicate that the CC Deposit remains open up dip over a strike length of 400 metres.  By including two previous holes drilled by Inmet, this up dip potential covers a minimum strike length of 600 metres.  In addition, holes A-07-53 and A-07-51 confirm the central axis of higher grade and thicker mineralization.  Hole A-07-52, the deepest hole drilled by Mantle in 2007, encountered a fault zone just below the mineralization, indicating a possible fault displacement of the target horizon.  Hole A-07-51, a step out of approximately 100 metres from A-05-32 (14.69% Zn+Pb over 26.7 metres), also provides additional confirmation that the deposit remains open to the northwest and down plunge. Not reported in the above table for A-07-51 was an intersection of massive sulphides from 503.55 to 507.80 grading 11.91% Zn+Pb – this footwall interval may indicate a new and separate lens of mineralization that will require further drilling to define.

“We are extremely pleased with the high grades and thicknesses we have consistently encountered at the CC Deposit.  These are the kinds of results that will provide Mantle a solid platform for growth.  Given the open ended nature of the deposit and the better understanding we now have of the trends of mineralization, our 2008 drilling program will be focused on expanding the zone of mineralization,” commented Jim Mustard, President of Mantle.

“With the CC Deposit continuing to deliver these elevated grades and widths and with the potential to further increase the size of the deposit, without a doubt the Akie property now takes on a strategic role in our future.  Combined with our dominant land package, Mantle is very well positioned to further unlock the value of this world class zinc-lead district.”

Plans are already well underway for the upcoming 2008 exploration season.  The Company looks forward to providing further details in this regard in the coming weeks.

Assay Samples and Procedures

All core selected for analysis is split by diamond saw and sampled, with a maximum of 1.5 metres of core in each sample.  These are placed in plastic bags, shipped in secure containers to Acme Analytical Laboratories Ltd., Vancouver, B.C., and there subjected to aqua regia digestion followed by ICP-ES and ICP-MS analysis (Acme Group 7AX Multi-Element Assay) to determine zinc, lead and silver content. Standards and blanks are inserted into the assay stream at a rate of about one of each for every 25 core samples.  Check assays are regularly carried out as necessary by Global Discovery Labs, also in Vancouver , employing aqua regia digestion followed by atomic absorption finish (Group 4).

About the Akie Property 

The Akie zinc-lead property is situated within the southern-most part (Kechika Trough) of the regionally extensive Paleozoic Selwyn Basin, one of the most prolific sedimentary basins in the world for the occurrence of SEDEX zinc-lead-silver and stratiform barite deposits.

Drilling on the Akie property by Inmet Mining Corporation during the period 1994 to 1996 and by Mantle in 2005, 2006 and 2007 has identified a significant body of baritic-zinc-lead SEDEX mineralization (Cardiac Creek Deposit).  The deposit is hosted by variably siliceous, fine grained clastic rocks of the Middle to Late Devonian ‘Gunsteel’ formation.

Two similar deposits, Cirque and South Cirque, located some 20 kilometers northwest of Akie and owned under a joint venture by Teck Cominco and Korea Zinc, are also hosted by Gunsteel rocks and have a combined geologic inventory in excess of 50 million tonnes averaging approximately 10% combined zinc+lead.

Qualified Person

John R. Fraser , P.Geo. (B.C.) is the Qualified Person for the Company, as defined by NI 43-101, and is responsible for the technical information contained in this release.

The TSX Venture Exchange has neither approved nor disapproved the contents of this press release.

MANTLE RESOURCES INC.

ON BEHALF OF THE BOARD OF DIRECTORS

Peeyush Varshney

Peeyush Varshney , LLB

CEO and Chairman

©2008 Canada Zinc Metals Corp.
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