September 18, 2006

Mano Discovers Extensions to the High-Grade Tongo Kimberlites in Sierra Leone and Initial Samples Yield Diamonds

No: 2006/18


  • Four kimberlite dykes discovered to the east of the Tongo diamond fields
  • Small samples of kimberlite, weighing one tonne, yielded 31 diamonds weighing 1.96-carats in aggregate



  • Ground geophysical surveys conducted to map the kimberlites and search for pipes and blows

Mano River Resources Inc (“Mano” or “the Company”) announces the discovery of extensions to the high-grade Tongo kimberlite dykes within its 9,700km2 Reconnaissance Exclusive Prospecting Licence (“REPL”) in Sierra Leone that is held under Joint Venture with BHP Billiton. BHP Billiton can earn a 51% equity interest in the project through an investment of $3.4million and has to date expended in excess of $1million. The partners will shortly be applying for core target areas, to include the Tongo dyke extensions, and relinquish the balance of the ground as envisaged in the two year licence.

Four dykes have been mapped immediately east of the Tongo diamond fields, one of which extends over a distance of at least two kilometres into Mano’s REPL. The Tongo diamond fields is an area of alluvial diamonds in eastern Sierra Leone which has been commercially mined in the past by Sierra Leone Selection Trust and more recently by artisanal diamond miners. Mano recently collected five small samples, weighing a total of 1,050kg, from three of these kimberlites for mineral chemistry analysis and diamond recovery at Mano’s Laboratory in Monrovia. A total of 31 diamonds weighing 1.96-carats in aggregate were recovered with the three largest diamonds weighing 0.3-ct, 0.3-ct and 0.25-ct, as summarised below.


The Tongo dykes have previously been drilled and bulk sampled in the so-called “Tongo Mining Lease” that was held by Sierra Leone Selection Trust with in-situ grades of up to 3 carats per tonne being reported. This data is consistent with Mano’s own geological assay results.

Initial mineral chemistry data from Mano’s samples suggests a high diamond potential on the basis of the G10 garnet chemistry.
Ground electro-magnetic surveys have been completed in order to map the dykes and check for the presence of blows or pipes along strike. The data are currently being processed and interpreted and any potential pipe or blow targets will be investigated through drilling.

Mano’s VP Diamonds, Karl Smithson, comments: “Our exploration efforts under this BHP Billiton funded programme continue to yield good results. The Tongo dykes have previously reported grades of 3 carats per tonne and are the richest known kimberlites in Sierra Leone. Mano and its partner, through the REPL, hold a significant portion of this high-grade kimberlite dyke zone. This is one of the four areas in which the partners have conducted follow up exploration in eastern and south eastern Sierra Leone. We have already discovered a new kimberlite in the licence (see News Release dated 14th August, 2006) and it is hoped that two other areas in the REPL will unearth additional new discoveries in the future.”

Mano’s Qualified Person responsible for supervising the exploration programme and reviewing the content of this release is Karl Smithson, who holds a BSc in Geology from Kingston University in the UK and is a member of the South African Council for Natural Scientific Professions.


For further information on Mano River Resources and its exploration programme, you are invited to visit the Company’s website at or contact one of the following:

Tom Elder
President and CEO
Mano River Resources Inc.
+44 (0) 1235 810740

Justine Howarth/Ana Ribeiro
Parkgreen Communications
+44 (0) 20 7493 3713

Jamie Cumming
Bell Lawrie UK
+44 141 221 7733

Raz Hussein
Controller Canada
+1 (604) 689 1700

About Mano River Resources

Mano is an exploration and development company focused on the discovery of diamond, gold and iron ore deposits in the Archaean terrain of the highly prospective, under-explored, West African Mano River Union countries of Sierra Leone, Liberia, and Guinea. The Company has a bankable feasibility study underway on what it is hoped will become Liberia’s first major gold mine, while in Sierra Leone joint venture partner Petra is already producing diamonds as it explores the Kono kimberlite dykes. The Company presently has some 25,000km2 under mineral licence and joint ventures in place with BHP-Billiton, Golden Star Resources, Navasota, Petra Diamonds, Searchgold and Trans Hex Group. In eastern Liberia, reconnaissance work is under way on Mano’s Putu iron ore project, with Fe assays due shortly on the latest batch of samples from this 8km long deposit.

The TSX Venture Exchange has not reviewed and does not take responsibility for the adequacy or accuracy of this release