re: important deep intersection in rosario clavo -
Important Deep Intersection in Rosario Clavo - Palmarejo
11 April 2006 The Manager Companies Australian Stock Exchange Limited 20 Bridge Street Sydney NSW 2000 (2 pages by email) Dear Madam
IMPORTANT DEEP INTERSECTION IN ROSARIO CLAVO PALMAREJO/TROGAN MEXICO
Hole PMDH522D, being one of the diamond holes designed to test the deep plunge extension of the Rosario clavo in the Palmarejo deposit, has intercepted significant mineralisation as follows: 24.4 metres @ 2.3 g/t Au and 196 g/t Ag (5.3 g/t AuEq at gold to silver price ratio of 65:1) including 6.0 metres @ 3.8 g/t Au and 297 g/t Ag (8.4 g/t AuEq) and 3.0 metres @ 8.0 g/t Au and 699 g/t Ag (18.8 g/t AuEq)
Hole PMDH522D is located 230 metres down plunge and northwest of the deepest holes on the Rosario clavo. The hole pierces the La Blanca structure a considerable distance northwest of the deepest holes on the Rosario clavo and extends the precious metal window down to RL 850 metres, well below the historically accepted base. The intercept significantly extends the zone of deep mineralisation at Rosario and, after further infill drilling, should have considerable positive impact on future resource estimation in this area. The clavo is still open down plunge and along strike.
The deep drilling program was initiated in January to test the concept that the Rosario structural intersection is the main feeder structure at Palmarejo. The wide mineralised interval in PMDH522D, localised in a stockwork zone above the main La Blanca fault, is consistent with the mineralisation style in drill holes located up-plunge. The results of PMDH522D confirm the model of drilling deep feeder structures beneath the main clavos. Moreover, deep drilling will also test areas within the precious metals window for new, blind clavos (e.g., the Tucson and 108 clavos). Silver to gold ratios, which show pronounced reverse zonation (i.e., silver-rich at the top, gold-rich at the bottom) continue to be used to guide exploration on the La Blanca and La Prieta structures.
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