Drilling Results

Tertiary Minerals PLC 13 May 2003 www.tertiaryminerals.com 13 May 2003 DRILLING RESULTS - FINNMARK PGE PROJECT Tertiary Minerals plc ('Tertiary Minerals' or 'the Company') announces initial assay results from a recent drilling programme on its Finnmark Platinum Group Element (PGE) project in Norway, the first of a number of projects to be drill tested this Spring and Summer. Anomalous PGE intersections were made in each of the three holes drilled with broad intersections of anomalous PGM values in composite samples and higher anomalous values in narrow sections. Significant assay results are as follows (all samples assaying greater than 0.1g /t platinum+palladium+gold) : Hole No. From Intersection Pt+Pd+Au Pt Pd Au (m) Width (m) g/t g/t g/t g/t 03GD001 12.35 0.55 0.69 0.27 0.38 0.04 52.40 1.00 0.12 0.05 0.06 0.01 03GD002 26.90 4.00 0.26 0.03 0.03 0.20 Composite 30.90 4.00 0.11 0.05 0.04 0.02 Composite 39.00 4.00 0.15 0.05 0.06 0.04 Composite 43.00 0.55 0.12 0.05 0.06 0.01 117.2 1.80 0.11 0.04 0.06 0.01 Composite 03GD003 48.4 2.00 0.10 0.05 0.04 0.01 Composite 58.1 4.00 0.16 0.06 0.07 0.03 Composite The programme was designed to investigate the discovery of PGE mineralisation made by Tertiary in its recent summer field programmes which identified a small outcrop within a North-South striking ultramafic intrusion where two grab samples averaged 2.5 grammes per tonne platinum (Pt) + palladium (Pd) + gold (Au) with a Pt-Pd ratio of approximately 1:1. Subsequent geophysical exploration identified a Induced Polarisation (IP) anomaly associated with the PGE bearing outcrop but extending for several hundred metres north-south along strike. Two drill holes (03GD001 and 2) tested the IP anomaly beneath the outcropping PGE mineralisation. Hole 03GD002 was drilled 80m behind 03GD001 on approximately the same Easting. The third hole (03GD003) tested the same anomalous zone 700m to the south. All holes were drilled at -45 degrees west. The majority of anomalous samples contain only low levels (approx. 1%) of sulphide minerals (the likely cause of the IP anomaly) and there is not a direct correlation between higher sulphide content and higher anomalous PGE values. Consequently the controlling factors on the location of PGE mineralisation are not yet established and further assaying and mineralogical work is therefore required before concluding if this small programme has effectively tested the economic potential of this PGE bearing intrusion. Further Information: Patrick Cheetham, Executive Chairman, Tertiary Minerals. Tel: 01625-626203 John Greenhalgh, City of London PR. Tel: 020-7628-5518 N.B For reported assays, sample preparation was carried out at the SGS laboratories in Ojebyn, Sweden, where the core was cut in half using a diamond saw. Half the core was pulverised to 90% <75microns. Composites were made up of equal amounts of individual samples and 100g shipped to ALS Chemex, Canada for assay by methods PGM-MS24 (50g Fire assay with ICP-MS Finish). A total of 50 samples were sent for assay, including 18 composite samples. This information is provided by RNS The company news service from the London Stock Exchange
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