News

ITH Expands Mayflower Deposit at North Bullfrog Project, Nevada

May 28, 2008

Highlights include:

12.2 metres of 2.13g/t gold

52 metres of 0.85 g/t gold

35 metres of 0.75 g/t gold


Vancouver, B.C........International Tower Hill Mines Ltd. ("ITH" or "the Company") - (TSXV: ITH, AMEX: THM, Frankfurt: IW9) is pleased to announce the results from the remainder of the drill holes from its first phase drilling program at its new Mayflower deposit, Nevada. The latest intersections include 12.2 metres of 2.13g/t gold; 52 metres of 0.85 g/t gold, and 35 metres of 0.75 g/t gold (Table 1). The results highlight the bulk tonnage potential of the Mayflower deposit while confirming the potential for higher grade zones within the larger target (such as 9.1 metres of 7.18 g/t gold).

The data from Mayflower is being prepared for use in the preparation of an initial resource estimate, and samples have been selected for initial metallurgical testing. The Company will utilize the knowledge gained from this program to begin the systematic exploration of its large land package, and intends to focus on the definition of a series of deposits which could be developed together. The latest results continue to expand the broad zones of mineralization defined earlier by ITH and Barrick Gold Corporation, where the mineralized structure has now been defined in drilling for over 600 metres of strike and down to a depth of 300 metres and remains open. The Company has now completed 24 holes into the deposit.

Table 1
Mayflower Deposit Assay Highlights
(inclusive of those announced in NR08-09)

Hole ID

From

To

Intercept (metres)

Gold (g/t)

NB-08-07

44.2

51.8

7.6

0.80

NB-08-09

96.0

103.6

7.6

0.81

108.2

118.9

10.7

0.49

NB-08-10

65.5

117.4

51.8

2.02

Including

83.8

93.0

9.1

7.18

NB-08-11

111.3

125.0

13.7

0.79

131.1

137.2

6.1

0.79

NB-08-12

70.1

77.7

7.6

0.88

80.8

118.9

38.1

1.43

Including

88.4

103.6

15.2

2.87

NB-08-13

0.0

9.1

9.1

0.51

NB-08-14

157.0

169.2

12.2

1.06

178.3

204.2

25.9

0.75

NB-08-15

77.7

105.2

27.4

0.80

NB-08-16

99.1

103.6

4.6

1.53

NB-08-17

74.7

99.1

24.4

0.63

Including

91.4

96.0

4.6

1.90

NB-08-30

146.3

155.5

9.1

0.49

NB-08-35

59.4

100.6

41.1

0.63

Including

88.4

99.1

10.7

1.15

NB-08-36

86.9

138.7

51.8

0.85

including

105.2

112.8

7.6

1.84

including

117.4

132.6

15.2

0.93

NB-08-38

61.0

68.6

7.6

1.55

73.2

85.3

12.2

2.13

114.3

128.0

13.7

0.60

NB-08-40

68.6

103.6

35.1

0.75


Analysis of Results

The results from the 2008 drilling program have shown that Mayflower mineralization is hosted in a steep 50-60 metre wide northwest trending structural zone, where broad zones of low-grade mineralization are associated with silicification and adularia alteration and high-grade mineralization is associated with quartz-calcite filled veinlets and fault breccias. These broad, well-mineralized intercepts in both the historic and recent drilling are primarily developed within favourable volcanoclastic units along a well-developed structural zone forming the large bulk-tonnage target. The high-grade mineralization is well exposed in the David Adit, where native gold was observed in silicified clasts coated with calcite. Most of the high grade intersections to the west of the David Adit occur below tunnel level and were never developed in the past.

The mineralization is low-sulphide in character with deep pervasive oxidation. The bulk-tonnage potential of the deposit is highlighted by the broad continuous zones of mineralization found in many holes (Table 1) and the fact that 16 of the 24 holes drilled have greater than 20 metres of mineralization (Table 2). The deposit remains open to the north and at depth.

Table 2
Summary of all mineralized drill holes in the Mayflower Deposit

Hole ID

Total Length
(metres)

Length Mineralized
(metres)*

Average Grade of Mineralized Section (g/t gold)

% of hole Mineralized

NB-08-10

182.88

54.86

1.95

30%

NB-08-12

213.36

57.90

1.13

27%

NB-08-36

213.36

64.02

0.79

30%

NB-08-38

300.23

33.53

1.37

11%

NB-08-40

208.79

54.86

0.63

26%

NB-08-14

365.76

41.15

0.82

11%

NB-08-35

184.40

56.39

0.56

31%

NB-08-11

207.3

42.68

0.60

21%

NB-08-15

346.25

36.59

0.69

11%

NB-08-26

304.80

41.15

0.56

14%

NB-08-17

304.80

44.19

0.51

14%

NB-08-18

213.40

16.77

1.01

8%

NB-08-41

300.23

41.16

0.37

14%

NB-08-16

147.80

21.33

0.59

14%

NB-08-09

182.88

18.29

0.62

10%

NB-08-07

153.92

22.85

0.49

15%

NB-08-30

304.80

21.35

0.40

7%

NB-08-08

182.88

16.77

0.37

9%

NB-08-13

304.80

10.66

0.55

3%

NB-08-39

147.83

10.66

0.39

7%

(* Intercepts included in these sums have greater than 0.25g/t gold with less than 3 metres of internal waste.)

Click to enlarge
Figure 1: Geological/drill hole plan map of the Mayflower deposit (historic Barrick drill hole traces in white).
Tdf=debris flow deposits; TrT2=Rhyolite tuff; Trri=Rhyolite intrusive; Qac=Quaternary alluvium.

In addition to the Mayflower deposit, there is considerable potential to develop other bulk mineable deposits in the surrounding area (Figure 2). Broad zones of mineralization have been found at Air Track Hill (ATH), Sierra Blanca and the Pioneer Prospect (Table 3). In addition, the Jolly Jane, Connection and Yellow Jacket areas have the potential to host significant mineralization.

The Company has retained an independent contractor to complete an initial NI 43-101 compliant resource estimate for the Mayflower Deposit, which is scheduled for completion in Q3 of 2008. In addition, the Company is currently conducting an integrated structural/mineralization analysis of the North Bullfrog District using the knowledge gained at Mayflower to better define follow-up drill targets in the other large mineralized zones defined to date. The Company is planning a follow-up exploration/drill program in the late fall of 2008 to address expansions of the Mayflower deposit as well as to define new deposits in this prolific and well mineralized area of Nevada.

Click to enlarge
Figure 2: Significant Prospects in the North Bullfrog Project Area where additional deposits might be located.

Table 3
Summary of total mineralization from ITH holes outside of the Mayflower Deposit

Prospect

Hole ID

Total Depth (metres)

Mineralized Thickness (metres) *

Average Grade (gold g/t)

% of hole Mineralized

ATH

NB-08-21

198.10

41.15

0.80

21%

ATH

NB-08-26

304.80

41.15

0.56

14%

ATH

NB-08-29

198.12

54.85

0.41

28%

ATH

NB-08-27

198.12

38.09

0.37

19%

ATH

NB-08-19

213.36

19.81

0.45

9%

ATH

NB-08-23

137.16

10.67

0.50

8%

ATH

NB-08-25

198.10

10.66

0.50

5%

ATH

NB-08-22

198.12

7.62

0.49

4%

ATH

NB-08-20

198.12

3.04

0.71

2%

Sierra Blanca

NB-07-01

247.19

77.50

0.39

31%

Sierra Blanca

NB-07-02

354.18

18.60

0.68

5%

Pioneer

NB-07-04

91.74

22.15

0.97

24%

(* Intercepts included in these sums have greater than 0.25g/t gold with less than 3 metres of internal waste.)


Property Summary

The North Bullfrog Project area is located near Beatty, Nevada and has excellent access and infrastructure. It is 7 kilometres north of the historic Bullfrog mine operated by Barrick Gold Corporation until the mid 1990's (see NR07-05). The North Bullfrog project is a joint venture with the Redstar Gold Corporation (TSXV: RGC) in which ITH can earn up to a 70% interest. To date, the Company has completed approximately half of the work commitment required to earn its initial 60% interest.

Qualified Person

Jeffrey A. Pontius (CPG 11044), a qualified person as defined by National Instrument 43-101, has supervised the preparation of the scientific and technical information that forms the basis for this news release and has approved the disclosure herein. Mr. Pontius is the President and CEO of ITH.

The work program at North Bullfrog was designed and is supervised by Dr. Russell Myers, Vice President, Exploration of ITH, and Jacob Margolis, Exploration Manager of Redstar Gold Corporation, who are responsible for all aspects of the work, including the quality control/quality assurance program. On-site personnel at the project photograph the core from each individual borehole prior to preparing the split core. Duplicate reverse circulation drill samples are collected with one split sent for analysis. Representative chips are retained for geological logging. All sample shipments are sealed and shipped to ALS Chemex for assay. ALS Chemex's quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025: 1999. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. Quality control is further assured by the use of international and in-house standards. Finally, representative blind duplicate samples are forwarded to ALS Chemex and an ISO compliant third party laboratory for additional quality control.

About International Tower Hill Mines Ltd.

International Tower Hill Mines Ltd. is a resource exploration company, focused in Alaska and Nevada, which controls a number of exploration projects representing a spectrum of early stage to advanced gold and base metal discoveries. ITH is committed to building shareholder value through new discoveries while maintaining a majority interest in its holdings, thereby giving its shareholders the maximum value for their investment.

On behalf of
INTERNATIONAL TOWER HILL MINES LTD.

(signed) Jeffrey A. Pontius

Jeffrey A. Pontius,
President and Chief Executive Officer

Contact Information:
Quentin Mai, Vice-President - Corporate Communications
E-mail: qmai@internationaltowerhill.com
Phone: 1-888-770-7488 (toll free) or (604)683-6332 / Fax: (604) 408-7499


The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of the contents of this press release, which has been prepared by management.

Cautionary Note Regarding Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act and Section 27E of the Exchange Act. All statements, other than statements of historical fact, included herein including, without limitation, statements regarding the anticipated content, commencement and cost of exploration programs, anticipated exploration program results, the discovery and delineation of mineral deposits/resources/reserves, the potential expansion of the currently identified resource at Livengood, business and financing plans and business trends, are forward-looking statements. Information concerning mineral resource estimates also may be deemed to be forward-looking statements in that it reflects a prediction of the mineralization that would be encountered if a mineral deposit were developed and mined. Although the Company believes that such statements are reasonable, it can give no assurance that such expectations will prove to be correct. Forward-looking statements are typically identified by words such as: believe, expect, anticipate, intend, estimate, postulate and similar expressions, or are those, which, by their nature, refer to future events. The Company cautions investors that any forward-looking statements by the Company are not guarantees of future results or performance, and that actual results may differ materially from those in forward looking statements as a result of various factors, including, but not limited to, variations in the nature, quality and quantity of any mineral deposits that may be located, the Company's ability to obtain any necessary permits, consents or authorizations required for its activities, the Company's ability to produce minerals from its properties successfully or profitably, to continue its projected growth, to raise the necessary capital or to be fully able to implement its business strategies, and other risks and uncertainties disclosed in the Company's annual report on Form 20-F filed with the United States Securities and Exchange Commission (the "SEC"), and other information released by the Company and filed with the appropriate regulatory agencies. All of the Company's Canadian public disclosure filings may be accessed via www.sedar.com and its United States public disclosure filings may be accessed via www.sec.gov, and readers are urged to review these materials, including the technical reports filed with respect to the Company's mineral properties.

Cautionary Note Concerning Reserve and Resource Estimates

This press release and other information released by ITH uses the terms "resources", and "inferred resources". United States investors are advised that, while such terms are recognized and required by Canadian securities laws, the SEC does not recognize them. Under United States standards, mineralization may not be classified as a "reserve" unless the determination has been made that the mineralization could be economically and legally produced or extracted at the time the reserve determination is made. Mineral resources that are not mineral reserves do not have demonstrated economic viability. United States investors are cautioned not to assume that all or any part of inferred resources will ever be converted into reserves. Inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined legally or economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Therefore, United States investors are also cautioned not to assume that all or any part of the inferred resources exist, or that they can be mined legally or economically.

National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101") is a rule developed by the Canadian Securities Administrators, which established standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. Unless otherwise indicated, all reserve and resource estimates contained in this press release or released by ITH in the future, have been or will be prepared in accordance with NI 43-101 and the Canadian Institute of Mining, Metallurgy and Petroleum (the "CIM") Standards on Mineral Resource and Mineral Reserves, adopted by the CIM Council on November 14, 2004 (the "CIM Standards") as they may be amended from time to time by the CIM. United States shareholders are cautioned that the requirements and terminology of NI 43-101 and the CIM Standards differ significantly from the requirements and terminology of the SEC set forth Industry Guide 7. Accordingly, the Company's disclosures regarding mineralization may not be comparable to similar information disclosed by companies subject to the SEC's Industry Guide 7.

This press release contains information with respect to adjacent or similar mineral properties in respect of which the Company has no interest or rights to explore or mine. The Company advises US investors that the US Securities and Exchange Commission's mining guidelines strictly prohibit information of this type in documents filed with the SEC. Readers are cautioned that the Company has no interest in or right to acquire any interest in any such properties, and that mineral deposits on adjacent or similar properties are not indicative of mineral deposits on the Company's properties.

This press release is not, and is not to be construed in any way as, an offer to buy or sell securities in the United States.
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