Volcanology, Geochemistry and Petrology

Subduction volcanoes such as Mt Ngauruhoe are being studied using microanalytical methods

We use an integrated suite of field and laboratory techniques to tackle current challenging questions in a broad range of topics in earth sciences.

Field studies take in locations as diverse as New Zealand’s Southern Alps and Taupo Volcanic Zone, Alaska, California, the Kermadec Islands, China and Antarctica.

Analytical Facilities

Ultra-clean lab facilities

Our research is based around the School’s modern petrographic and geochemical analytical facilites, which include:

  • Cosmogenic Nuclide Laboratory
  • Electronprobe microanalysis
  • Ultra-clean geochemistry laboratory
  • ICP-MS - Inductively-Coupled Plasma Mass Spectrometry
  • Sector-field ICP-MS
  • Multi-collector ICP-MS
  • Excimer laser ablation system
  • Light microscopy

This equipment is part of a state of the art facility for the preparation and analysis of chemical and isotopic analysis, with a wet chemistry laboratory and an ultra-clean chemical separation laboratory. It opened in 2006.

Multi-collector ICP-MS

The ICP-MS laboratory houses three Inductively Coupled Plasma Mass Spectrometers - a quadrupole ICP-MS and sector-field ICP-MS that are primarily used for trace element concentration analysis and a Multi-Collector ICP-MS for isotopic analysis. Samples can be analysed either in situ as solids (using a deep UV laser) or in solution, following chemical processing.

In late 2009, we acquired a new JEOL Superprobe electronprobe microanalyser (EPMA) that allows in situ major element and trace element analyses and imaging of solid samples.

New sample preparation, rock crushing and mineral separation facilities were completed in early 2012, and a purpose-built cosmogenic nuclide laboratory for the preparation of samples for cosmogenic dating was completed in 2014.

A new Excimer laser ablation system (Resonetics S155-SE, 193nm) was installed in early 2015, and can be coupled to both of the quadrupole and sector-field ICP-MS instruments. A UV/Vis/NIR spectrophotometer will be added to the Geochemistry facilities in 2015.

Through collaborative arrangements worldwide, we also utilise additional equipment including: thermal ionisation mass spectrometers (TIMS), ion microprobe (SIMS), nano-SIMS, and Fourier Transform Infra Red spectroscopy (FTIR).

Read more about our facilities.

Staff and Students

Analysing volcanic minerals and glasses using the Electron Microprobe.

The geochemistry and petrology facilities directly underpin the research of around 20 postgraduate students in the VGP group. Other staff and students in the School and other New Zealand universities also make use of the facility. We collaborate with the Antarctic Research Centre, GNS Science and NIWA.

Read more about our group members.