April 13, 2005

TERTIARY PLANS DRILL TESTING OF TARGETS DEFINED AT ITS MAIN NICKEL PROSPECT IN SWEDEN

• Nine Conductors Identified At Notträsk Within Three Horizons Of Zone 750m Long
  
  
• 3km Zone Of Possible Disseminated Mineralisation Extends Along Strike
  

Tertiary Minerals, (“Tertiary” or “the Company”) announces plans to drill-test new targets for nickel-copper massive sulphides identified by an extensive ground geophysical survey at Notträsk, the Company’s main nickel prospect in Sweden.

Results from a large loop transient electromagnetic (TEM) survey across the Central Zone of the Notträsk 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 750 metres. An additional zone of low resistivity extends over 3km along strike from the massive sulphide targets which may indicate the presence of disseminated nickel-copper sulphide mineralisation or additional, but yet unresolved, massive sulphide zones.

Previous exploration at Notträsk, 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 Notträsk intrusion, the nickel sulphides found were of low nickel tenor.

Subsequent work by Tertiary Minerals and by Anthony Naldrett, (Emeritus Professor of Geology at the University of Toronto and an internationally acknowledged authority on nickel sulphide mineralisation) whilst consulting to Tertiary on Notträsk, highlighted the Central Zone as having the potential to host higher-tenor nickel sulphide mineralisation.

The Notträsk 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 Notträsk represent an exciting opportunity to advance its main nickel-copper project at a time when market for these commodities is particularly 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 info: Patrick Cheetham, Executive Chairman, Tertiary Minerals plc.
Tel: 01625-626203

John Greenhalgh/Ron Marshman, City of London PR Ltd.
Tel: 0207-628 5518