Wyoming, South Dakota & Arizona

U.S. uranium exploration properties - 100% interest

Tournigan has secured property claims and exploration licences for uranium targets in the US in three states - Wyoming, Arizona and South Dakota - on which it has more than 56,000 acres of federal lode mining claims. The South Dakota and Wyoming properties are situated in close proximity to each other along the border between the two states.

On March 3, 2008 Tournigan announced that it had completed the acquisition of 100% interest in its US uranium properties from Sweetwater River Resources LLC ("Sweetwater"). For the initial exploration on its Wyoming properties, Tournigan retained the project management and staffing services of Cowboy Exploration LLC, a Wyoming-based geological consulting company with operational expertise throughout the western US.

Wyoming
Tournigan's uranium claim groups are located in the Shirley Basin, Great Divide Basin and Green River Basin Uranium Districts of Wyoming where mines have historically produced approximately 200 million lbs of uranium oxide (U3O8).(1)

Tournigan's properties consist of 1,571 claims on 32,457 acres and 879 acres on three leases that are close to former producing mines or in-situ recovery (ISR) uranium operations with similar roll-front type deposits.

Click to enlarge

UT Claims
Between August 2007 and October 2007 Tournigan completed its first phase uranium exploration program consisting of 49 drill holes totaling 6,692 metres on the UT claims in the Cyclone Rim area of the Western Great Divide Basin. In January 2008, the company announced that uranium mineralization had been encountered in 15 of the 49 rotary holes.

Highlights from the gamma log radiometric readings of these 15 holes include:

UT-008 with 0.076% eU308* over 3.1 metres (10 ft);
UT-020 with 0.050% eU308 over 3.4 metres (11 ft), and
UT-044 with 0.067% eU308 over 3.1 metres (10 ft).

(*eU308: radiometric equivalent of uranium content)

Results of all of the geologically significant intercepts are available from this link: UT Intercepts. A map of the claims area with drill locations is available from this link: UT Trend plan map.

Tournigan drilled the 49 holes on 122 metre (400 foot) centers. Management believes the mineralized intercepts represent portions of at least two shallow roll fronts which may be extractable by surface mining or by in-situ recovery (ISR) methods. Additionally, Tournigan drilled seven core holes in order to twin holes containing the most significant mineralization in the UT claims for analysis.

CR Trend Claims
On another group of claims in the Cyclone Rim, known as the CR Trend, Tournigan began in late 2007 an 8,000 metre drill hole program. The company has targeted its drilling along nine fences of holes on the CR Trend claims to test for additional uranium mineralization along a 40 kilometre roll front trend contained in these claims.

Each fence is approximately 4,500 metres apart with vertical drill holes spaced approximately 122 metres apart along each fence. A map of the claims area with drill locations is available from this link: CR Trend plan map.

On February 8, 2008 Tournigan released radiometric data from the first phase 6,605 metres of drilling in 34 drill holes. The company was highly encouraged by results from two of the holes along the second fence and from two holes along the ninth fence, which is located approximately 32 kilometres further east.

Highlights included:

CR-14 with 0.059 % eU3O8 over 8 metres (26 ft)
CR-10 with 0.016 % eU3O8 over 5.5 metres (18 ft)

CR Claims Drilling - Geologically Significant Gamma Log Intercepts

Hole CR-14 was subsequently twinned to obtain core samples from which the disequilibrium ratio could be determined. The disequilibrium ratio equates the true U3O8 content (%U3O8) to the radiometric equivalent (%eU3O8), which is determined by downhole radiometric logging. The cored hole and selected mineralized intervals were sent to Hazen Research in Golden, Colorado for these analyses.

This page was updated on May 30, 2008

Mike Mracek, P.Eng.,Tournigan's Chief Operating Officer is a Qualified Person as defined by National Instrument 43-101 andhas reviewed and approved the technical disclosure contained in this web page.

(1) Source: Wyoming Mining Association:
http://www.wmaminelife.com/uranium/articles/artframe.htm