Hoke, L.; Sutherland, R. 1999 Mantle melting beneath New Zealand revealed by helium isotopes in gas discharges. Lower Hutt: Institute of Geological & Nuclear Sciences. Institute of Geological & Nuclear Sciences folio series 4. 1 v.
Abstract: The map shows measured variations in helium isotope ratios from thermal and non-thermal gas discharges, and extends the original work by Giggenbach et al. (1993). (auth)