Murchison United N.L

March 13, 2008 06:53 ET

High Grade Uranium Intersected at Bir En Nar in Mauritania

PERTH, WESTERN AUSTRALIA--(Marketwire - March 13, 2008) - Murchison United NL (ASX:MUR)(AIM:MUU) -


- Several high-grade uranium intersections indicated from downhole radiometric logging of samples from RC drilling at the Bir En Nar uranium prospect (Zednes Region, Mauritania).

- Logging results received from eight holes of the 41-hole (4,006m) programme, significant results included:

Drill Hole Section Intersection Thickness eU3O8
RC From (m) (m) (ppm)

BNR02 27.20 5.65 4,070
58.30 0.70 5,750
BNR04 6.25 1.00 7,180
BNR05 40.20 3.85 3,400
BNR07 24.40 2.15 5,130
BNR08 55.50 1.45 3,010
70.80 2.35 (ii) 11,250
87.45 1.55 5,060

-Further downhole radiometric logging results, together with assay results, will be released when received.

Drilling Results - Mauritania

Murchison United NL (ASX:MUR)(AIM:MUU) ('Murchison') is pleased to announce that it has received significant high-grade results from downhole radiometric logging of samples from the recently completed maiden RC drilling program at the Company's 100% owned Bir En Nar uranium prospect, located in the northern Zednes region of the Republic of Mauritania, West Africa (see Fig. 3).

To date, downhole logging results have been received for eight holes from the initial drilling program, which comprised a total of 41 RC drill holes of 50 to 150 metres length, inclined 60o towards south west (with a few exceptions) for a total of 4,006m. This programme was carried out during December 2007 by AMCO Construction under the supervision of Murchison's Technical Director, Bosse Gustafsson (see Fig. 1).

To view Fig.1 Drilling in Mauritania, December 2007, please visit the following link:

Anomalous radioactivity was observed on samples from all but six holes, with the best recorded samples exceeding 30,000 c/s with a scintillometer SGR from GF instruments.

Poseidon Geophysics carried out radiometric logging of all but four holes (which were blocked) to enable calculation of the equivalent uranium content. Results have been received for eight holes so far, with significant readings recorded in seven.

Four holes contained intercepts exceeding 5,000ppm eU3O8, with a maximum intercept of 2.35m at 11,250ppm eU3O8. These results are considered to be very encouraging and confirm the prospectivity for uranium mineralization. The Company will announce further results from downhole logging and assay results as soon as they are received.

The drilling focused on one of the Company's southernmost licences at the Bir En Nar, where episyenite samples collected during previous field reconnaissance visits returned assays of up to 9,500ppm Uranium.

The Bir En Nar prospect is a 900 metre long radioactive zone extending 50-70 metres in width and following a tectonic structure in a NW-SE direction (see Fig. 2). A smaller parallel zone occurs a few hundred metres to the SW. The main mineralisation occurs along a fracture zone at the contact between higher radioactive granite in south west and lower radioactive syenite in north east. Episyenite pods with uranium impregnation build up the mineralisation. The prospect was covered by RC drilling with SW-NE traverses at 70 metre spacings.

To view Fig.2 Bir En Nar 2007 drilling program, locations of first eight holes, please visit the following link:

Radiometric logging results received to date from initial drilling at the Bir En Nar Prospect:

Drill Hole Section Intersection Thickness eU3O8
RC From (m) (m) (ppm)

BNR01 4.60 0.65 540
BNR02 27.20 5.65 4,070
34.20 2.15 770
58.30 0.70 5,750
62.75 0.30 1,470
89.40 0.75 1,230
104.30 0.55 1,730
BNR03 No anomaly
BNR04 6.25 1.00 7,180
BNR05 40.20 3.85 3,400
BNR06 91.60 4.00 580
BNR07 24.40 2.15 5,130
BNR08 55.50 1.45 3,010
70.80 2.35 11,250
74.10 0.40 2,060
85.15 1.40 3,130
87.45 1.55 5,060

Approximately 1,000 assay samples, each representing 1 metre of drilling, were also collected for multi-element analysis in Canada by ALS Chemex. Assay results will be released as they become available.

The permit areas are located in the north of the country near the town of Bir Moghrein and at Bir En Nar in Zednes region. These were originally identified by the Company's Technical Director, Mr Bosse Gustafsson, from a study commissioned by the World Bank and further refined from aeroradiometric data highlighting the region's prospectivity for uranium occurrences.

To view Fig.3 Location of Murchison United's exploration permits in Mauritania, please visit the following link:

Murchison United has secured an extensive portfolio of uranium exploration projects comprising some 13,600km2 of highly prospective tenements in Mauritania and Guinea, West Africa. Its objective is to delineate significant new uranium deposits within these under-explored terrains.

In Guinea, initial drilling of the Company's Bohoduo uranium prospect and reconnaissance exploration at the Sesse uranium prospect is to be carried out during Q2 2008.

A 5,000m diamond drilling program at Firawa prospect in Guinea, is scheduled to commence in September 2008 following the wet season, targeting a JORC compliant resource estimate to follow up initial drilling carried out in 2007.

Commenting on the results, Murchison United's Managing Director, Mr Mark Reilly, said 'The exciting results attained so far at Bir En Nar in Mauritania follow on from the successful drilling program undertaken last year at Firawa, Guinea, and the recently completed A$7.4 million share placement.

We are eagerly awaiting the remaining logging and assay results from Bir En Nar and we look forward to embarking on further drilling programmes this year at the Bohoduo and Firawa Prospects in Guinea.'

Murchison United NL is an Australian-based no liability company whose principal activity is minerals exploration. The company currently has uranium exploration projects in Mauritania and Guinea in West Africa and copper interests in the Millennium copper leases in Cloncurry, Queensland and the Maroochydore copper project in Western Australia.

Shares in the company are listed on both the Australian Stock Exchange (ASX:MUR) and the Alternative Investment Market (AIM:MUU) of the London Stock Exchange

The information in this report that relates to exploration results in West Africa is based on information compiled by Mr. Bosse Gustafsson, who is a member of the European Federation of Geologists a Recognised Overseas Professional Organisation ('ROPO'). Mr Bosse Gustafsson is a full time Technical Director of Murchison United NL and is responsible for exploration activities in Mauritania and Guinea. Mr Gustafsson has sufficient experience, which is relevant to the style of mineralisation and the type of deposit under consideration and to the activity, which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the 'Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserve'. Mr Gustafsson consents to the inclusion in this report of the matters based on their information in the form and context in which it appears.

ACN 009 087 852

Contact Information

  • Murchison United N.L
    Murchison's Nominated Advisor for the AIM market
    is RFC Corporate Finance Ltd.
    Stuart Laing
    Managing Director
    +618 9480 2506