Research — Geochronology
NMGRL is involved with a variety of research projects addressing volcanic hazards, climate change, plutonism, and uplift and tectonism (among many others). We are also deeply involved with development of technology for 40Ar/39Ar geochronology and noble gas mass spectrometers.
Volcanic record in Antarctic ice
Volcanic ash and associated aerosol layers in glacier ice offer a uniquely complete record of explosive volcanism. Investigation of these layers, both in bare ice areas of and in ice cores offers insight into eruptive processes, local and regional ice flow processes, and the impact of eruptions on global systems (climate and ozone depletion). The Antarctic ice sheet is an ideal place to preserve a record of volcanic eruptions. The combination of chemical fingerprinting of glass shards, and chemical analysis of volcanic aerosols associated with tephra layers in Antarctic blue ice allows establishment of a high-resolution chronology of local and distant volcanism that can help understand patterns of significant explosive volcanism, atmospheric loading, and climatic effects associated with volcanic eruptions.