The TAU is an internationally recognised centre for electron probe microanalysis of volcanic gasses and melt inclusions, with clients worldwide. For more than four decades the TAU has served academic and commercial researchers and students, facilitating diverse research including:Holocene climate changepalaeoenvironmental reconstructionphysical volcanology and igneous petrogenesis, anddating of cultural remainsIn addition to the identification of source volcanoes for tephrochronology, volatile elements F, Cl and S are measured for studies of degassing and environmental impacts of eruptions.The TAU actively engages in developing improved methods for the microanalysis and preparation of tephras. Examples include analytical protocols for analysis of crypto-tephras with beam diameters as low as 3 microns without sodium mobilisation (Hayward, 2012), and preparation of crypto-tephras with grain sizes below 50 microns (Hall and Hayward, 2015).We welcome informal discussions, in confidence, of research plans from prospective and existing clients. Please note that the TAU and Electron Probe Microanalysis Facility are in high demand and that the schedule is usually fully booked up to 8-12 weeks in advance.Access to the Tephra Analysis Unit ContactPlease access the TAU via the Electron Probe Microanalysis Facility.Contact details and accessSample preparationTephra preparation for EPMA is challenging, especially for micro- and crypto-tephras. Advice is available on our sample preparation page, and please discuss with the EPMA Facility manager if necessary.Requirements for sample preparation Image Accepted values for the BCR2g and Lipari standards for tephra analysis Selected BibliographyThe following offers a cross-section of the vast available literature on EPMA of tephras and melt inclusions.Selected bibliography This article was published on Monday 1 July 2024