Drilling Report

Tertiary Minerals PLC 13 April 2005 TERTIARY MINERALS PLC NICKEL-COPPER DRILLING TARGETS DEFINED AT NOTTRASK • Nine Conductors Identified within Three Horizons along 750m Long Zone • 3km Long Zone Of Possible Disseminated Mineralisation Extends Along Strike Tertiary Minerals plc, ('Tertiary' or 'the Company') announces plans to drill-test new targets for nickel-copper massive sulphides identified by an extensive ground geophysical survey at Nottrask, the Company's main nickel prospect in Sweden. Results from a large loop transient electromagnetic (TEM) survey across the Central Zone of the Nottrask mafic intrusive confirm a total of nine, closely spaced, near-surface conductors and one deeper conductor, interpreted to indicate massive-sulphide mineralisation. The near-surface conductors are located on three distinct horizons within a strike length of 750m. An additional zone of low resistivity, extending over 3km along strike from the massive sulphide targets, may indicate the presence of disseminated nickel-copper sulphide mineralisation or additional, but yet unresolved, massive sulphide zones. Previous exploration at Nottrask, including work by Tertiary, has focused on the Marginal Zone of the gabbro intrusive and whilst this established the occurrence of massive sulphides in the Nottrask intrusion, the nickel sulphides found were of low nickel tenor. Subsequent work by Tertiary and by Anthony Naldrett, (Emeritus Professor at University of Toronto and an internationally acknowledged authority on nickel sulphide mineralisation) whilst consulting to Tertiary on Nottrask, highlighted the Central Zone as having the potential to host higher-tenor nickel sulphide mineralisation. The Nottrask intrusion is interpreted to lie in the north-western extension of Finland's Kotalahti Nickel Belt which hosts numerous past and current producing nickel mines, including Outokumpu's Hitura and Kotalahti mines. The Company considers that targets defined by the recent survey at Nottrask represent an exciting opportunity to advance its main nickel-copper project at a time when the market for these commodities is strong. Subject to field validation of anomalies, a drill programme will commence as soon as the Spring thaw is complete. The geophysical survey and interpretation of the results was carried out by Swedish geophysical consulting group Geovista AB. Further Information: Patrick Cheetham, Tertiary Minerals Plc. Tel: +44 (0)1625-626203. Mobile: +44 (0)7767-458751 John Greenhalgh/Ron Marshman, City of London PR Ltd. Tel: +44 ( 0)20-7628-5518 This information is provided by RNS The company news service from the London Stock Exchange
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