Table 1.

Summary of ignimbrites from the central TVZ analysed in this study.

EruptionAge (ka)Volume (km3)Source calderaMineral assemblageCrystallinity (%)No. of analysed pumice clastsRhyolite type
Kaharoa0.7±0.012c. 5Okatainaqtz+plg+bt±hbl±cumc. 106R1
Taupoc. 1.835Taupoplg+opx±qtz<55R2
Oruanuic. 26.5c. 530Taupoqtz+plg+hbl+opx<55R1+R2
Rotoitic. 61c. 100Okatainaqtz+plg+cum+hbl+opx±bt<305R1
Kaingaroa230±10>100Reporoaplg+opxc. 59R2
Mamaku240±10>145Rotoruaqtz+plg+opx±hbl<109R2
Ohakuri240±10>100Ohakuriqtz+plg+opx<1014R2
Matahina322±7>160Okatainaqtz+plg+opx±bt±hbl<156R1+R2
Whakamaru Group340−320>2000Whakamaruqtz+plg+san+opx+bt+hbl35–403R1
  • Abbreviations: bt, biotite; cum, cumingtonite; hbl, hornblende; opx, orthopyroxene; plg, plagioclase; qtz, quartz; san, sanidine

  • Compiled from Sutton et al. (1995), Beresford (1997), Brown et al. (1998), Milner et al. (2003), Gravley (2004), Nairn et al. (2004), Schmitz & Smith (2004), Smith et al. (2005), Wilson et al. (2006, 2009), Gravley et al. (2007), Deering et al. (2008, 2010), Cole et al. (2010), Leonard et al. (2010).