Ban-1 Zircon: A New Natural Zircon Reference Material for LA-MC-ICP-MS Zr and Hf Isotopic Determinations

New zircon reference materials for in situ zircon radiogenic Hf isotope and stable Zr isotopic determinations made by laser ablation multi-collector inductively coupled plasma-mass spectrometry (LA-MC-ICP-MS) are required due to high data productivity and consequently high reference material consumption rate. This study examines a new natural zircon for Zr isotope ratios by double spike thermal ionisation mass spectrometry (TIMS), and for Hf isotopes by bulk solution nebuliser (SN)-MC-ICP-MS with both Zr and Hf determined by LA-MC-ICP-MS. A total of five zirconium isotope measurements from drilled zircons, determined by TIMS, yield a mean delta Zr-94/90(IPGP-Zr) value of -0.09 +/- 0.06 parts per thousand (2s). Five and eight hafnium isotope measurements for powders from the drilled zircons and Ban-1-4 by SN-MC-ICP-MS, yield mean Hf-176/Hf-177 ratios of 0.282985 +/- 0.000011 (2s) and 0.282982 +/- 0.000007 (2s), respectively. The mean delta Zr-94/90(IPGP-Zr) value and Hf-176/Hf-177 ratio determined by LA-MC-ICP-MS analyses are -0.06 +/- 0.09 parts per thousand (2s, n = 504) and 0.282985 +/- 0.000035 (2s, n = 327), respectively. The isotopic homogeneities suggest that the Ban-1 zircon is a suitable reference material for microbeam Zr and Hf isotopic measurements.