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Gold/Mining/Energy : REX DIAMOND MINING TSE:RXD -- Ignore unavailable to you. Want to Upgrade?

To: LAURIE SELINE who wrote (1742)	10/4/1999 6:34:00 PM
From: George J. Tromp	Read Replies (1) \| Respond to of 2522

Here is the release Kimberlite discovery in Mauritania Toronto, October 4, 1999 Zouerat, 4 October 1999, Dr. Luc Rombouts reports from Mauritania that a kimberlite pipe has been found in the Tenoumer permit. The kimberlite is a coarse grained tuff breccia. The kimberlite pipe was found by pitting into a circular aeromagnetic anomaly of about 300 metres diameter. The aeromagnetic anomaly was visible on the preliminary maps of the airborne magnetic survey that is still underway. The pipe is covered by 1,5 metre of loose dune sand. The top 0.5 metre of the kimberlite is intensely calcreted; underneath occurs recognizable kimberlite, containing large pieces of ilmenite, olivine, phlogopite, as well as ultramafic nodules. The kimberlite will shortly be tested on its diamond content. Similar interesting magnetic anomalies, occuring upwind of an important pyrope garnet and chrome-diopside trail will be checked in the coming weeks. In the Touajil region, the company has found in the past three months many more diamonds and more angular pyropes during the sampling program of the gravels and surface sands. Garnets with subkelyphitic and kelyphitic rim (remnant of kimberlite rock), see pictures on rexmining.com point to a major kimberlite source about 15 kilometres further north than initially thought. The area of interest has now been intensely sampled and a detailed airborne geophysical survey will start on October 6 and will be completed one week later. Earlier in the year, the company found in the Touajil region the first commercial sized diamonds (up to 0.07 Ct) in Mauritania. The regional indicator mineral sampling of the newly obtained Arouedil and Ouassat permits is in full swing, with about 1000 samples taken per month. Macro-diamonds and kimberlite indicator minerals have been found in the first batch of samples taken in the Ouassat permit. The area where macro-diamonds were found has been covered in the past weeks by an airborne magnetic and radiometric survey. The preliminary magnetic data sets show a number of well-defined circular dipolar anomalies, similar to the one that led to the Tenoumer kimberlite discovery. The company considers the discovery of the Tenoumer kimberlite as a major breakthrough. An orientation study is underway on the pipe so as to fully understand the geophysical signature as well as the indicator mineral dispersal pattern. It is obvious that in the coming months many more kimberlite pipes will be found once the fully processed geophysical data become available. The pattern of diamond occurences and kimberlite indicator mineral trails points to separate diamond-bearing kimberlite provinces in the Touajil region, the Tenoumer permit and the Ouassat permit. The exploration permits of the company in Mauritania cover 100,000 kmý in total and are 100% owned by REX. For further information please contact: Katrien Geerts Investor Relations and Corporate Communication