Radiogenic and non-traditional stable isotope facility: Geology and geochemistry, Faculty of Earth and Life Sciences, VU University, Amsterdam, NL:
The facility is based around three multi-collector (MC) mass spectrometers (MS), FinniganMat 262 RPQ plus, ThermoFinnigan TritonPlus & MC-ICPMS (Neptune) plus ancillary geochemical support (sample characterisation, mineral separation, sample preparation, fluid inclusion heating-freezing stages, Raman microscope, scanning electron microscope, electron microprobe and dedicated clean labs for elemental separation etc). The facility is supported by a dedicated chemist and electronic and vacuum engineers. “Routine” analytical approaches include Sr-Nd-Pb-Hf-Si-Fe-Li-B isotope analyses and laser ablation Hf isotope determinations in minor phases such as zircon and high precision isotopic analyses of the extinct system 146Sm-142Nd. 1013 Ohm resistors on the Triton has established the potential to analyse as little as 10 pg of Sr-Nd-Pb, opening up totally new research directions [Koornneef et al. 2014]; e.g., individual melt inclusions in olivine and dust from Antarctic ice cores. The Triton has 6 ion counters enabling multi-detector ion counting determination of small beams; e.g., Os, U-Series. Much of the ground breaking research relies on detailed sample characterisation and innovative sampling methodologies; e.g., micro- drilling, polishing for fluid-melt inclusion characterisation and the ability to use in situ laser ablation to sample onto a Teflon filter for subsequent conventional Pb-Sr-Nd isotope analysis. Additional capabilities include undertaking HP-HT experimental petrology experiments (TA2) coupled with isotope geochemistry. Additional on-going research focuses on planetary differentiation processes, early Earth environments, magma chamber processes and the application of isotope geochemistry in archaeology-art-forensic-ecology etc.
For further details contact Professor Gareth Davies
Koornneef JM, Bouman C, Schwieters JB, Davies GR (2014). Measurement of small ion beams by thermal ionisation mass spectrometry using new 10¹³ Ohm resistors. Analytica Chimica Acta, 819, 49-55.