In situ measurement of hafnium isotopes in rutile by LA–MC-ICPMS: Protocol and applications

Temporal correlation of magmatic-tectonic events in the lower and upper crust in north-east Australia

“…Methods for interference correction and standards used to cross-check the accuracy in each run are same as for analysis of zircon grains (Murgulov et al 2007). Ewing et al (2011) measured bYb (determined from bHf) in rutile and compared bYb/bHf measured on zircon and rutile several times in the same analytical session. They showed little variation and no systematic change; this indicates that Hf-isotope data obtained on rutile are consistent with those obtained on zircon, despite the large difference in ablation rates as reported by Choukroun et al (2005).…”

“…Analyses were carried out at 3 Hz, a beam diameter of 55 lm and 55% output energy for the Mud Tank standard, and at 10 Hz, a beam diameter 100-250 lm and 100% output energy for unknowns. Ewing et al (2011) used a 233-lm-diameter beam for rutile unknowns and 28-233 lm for synthetic rutiles. Rutile unknowns in this study have higher Hf than those reported by Ewing et al (2011).…”

“…Choukroun et al 2005;Luvizotto et al 2009;Meinhold 2010;Ewing et al 2011). In situ (LAM-MC-ICPMS) Hf-isotope data on rutiles in a garnetrich McBride granulite, and whole-rock Sr-, Nd-and Hf-isotope data on granulites from the Chudleigh, McBride and Atherton Provinces are compared with published U-Pb ages for detrital zircons and zircons in granitoids (Murgulov et al 2007(Murgulov et al , 2009 and the McBride granulites (Rudnick and Williams 1987).…”

Determination of Hf isotope ratios in zircon using multiple collector-inductively coupled plasma mass spectrometry equipped with laser ablation and desolvating nebulizer dual sample introduction system

“…This DSI system is one of the best tools for the calibration of a LA-MC-ICPMS system unless otherwise ideally homogeneous matrix matched mineral standards with and without interfering elements are available (e.g., synthetic minerals). Some approaches have been reported for Hf isotopes in rutile and Nd isotopes in monazite (Ewing et al, 2011;Iizuka et al, 2011), yet any zircon standard has ever been available for Hf isotope analysis.…”

UPb LA-(MC)-ICP-MS dating of rutile: New reference materials and applications to sedimentary provenance

“…Due to its chemical and physical stability during the sedimentary cycle, rutile is commonly found in the heavy mineral suite of sedimentary rocks and can therefore provide important information about provenance. Rutile typically consists of > 98 wt % TiO 2 , but considerable amounts of other elements such as Fe, Cr, Nb and Ta and other HFSE (high field strength elements) can enter the crystalline lattice, allowing insight into rock forming conditions and discrimination between different source lithologies in provenance studies (e.g., Zack et al, 2004a;Carruzzo et al, 2006;Triebold et al, 2007;Meinhold et al, 2008;Morton and Chenery, 2009;Ewing et al, 2011;Meyer et al, 2011). The Zr content of rutile crystallised in a zircon-saturated environment is strongly dependent on temperature (Zack et al, 2004b;Watson et al, 2006;Ferry and Watson, 2007;Tomkins et al, 2007), and Zr-in-rutile is used as a geothermometer, commonly coupled to the Ti-in-zircon thermometer.…”