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

Kimura, Jun–Ichi; Tani, Kazuo; Chang, Qing

doi:10.2343/geochemj.1.0135

Cited by 15 publications

(31 citation statements)

References 39 publications

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“…We used a standard "H" sample cone instead of the high-transmission Jet sample cone for Lu isotope analyses, because use of the Jet sample cone could cause mass discrimination that significantly diverges from the exponential law for heavy REE (45) Lu obtained for a NIST SRM 3130a Lu standard solution during the course of this study (Table 2 and Table S2). …”

mentioning

confidence: 99%

Meteorite zircon constraints on the bulk Lu−Hf isotope composition and early differentiation of the Earth

Iizuka

Yamaguchi

Hibiya

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Knowledge of planetary differentiation is crucial for understanding the chemical and thermal evolution of terrestrial planets. The 176 Hf radioactive decay system has been widely used to constrain the timescales and mechanisms of silicate differentiation on Earth, but the data interpretation requires accurate estimation of Hf isotope evolution of the bulk Earth. Because both Lu and Hf are refractory lithophile elements, the isotope evolution can be potentially extrapolated from the present-day 176 Hf radioactive decay system is a powerful tool to study planetary silicate differentiation and offers a unique means of examining the origin of the Earth's earliest crust (1-12). To allow for the correct interpretation of Lu−Hf data, however, the Hf isotope growth curve of the bulk Earth must be firmly established. On the basis of the refractory lithophile nature of both Lu and Hf, the Lu−Hf isotope composition of chondrites has been proposed as a reference for the composition of the bulk Earth and its silicate portion (13-15). However, the present-day 176

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confidence: 99%

Meteorite zircon constraints on the bulk Lu−Hf isotope composition and early differentiation of the Earth

Iizuka

Yamaguchi

Hibiya

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…Hf isotopic variations of baddeleyite. Data for the Duluth zircon are from Woodhead & Hergt (2005), Kemp et al (2009), Kimura, Tani & Chang (2012) and Fisher, Vervoort & Dufrane (2014). …”

Section: Analytical Resultsmentioning

confidence: 99%

Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada

Mitchell

et al. 2016

Geol. Mag.

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Alkaline rock and carbonatite complexes, including the Prairie Lake complex (NW Ontario), are widely distributed in the Canadian region of the Midcontinent Rift in North America. It has been suggested that these complexes were emplaced during the main stage of rifting magmatism and are related to a mantle plume. The Prairie Lake complex is composed of carbonatite, ijolite and potassic nepheline syenite. Two samples of baddeleyite from the carbonatite yield U–Pb ages of 1157.2±2.3 and 1158.2±3.8 Ma, identical to the age of 1163.6±3.6 Ma obtained for baddeleyite from the ijolite. Apatite from the carbonatite yields the same U–Pb age of ~1160 Ma using TIMS, SIMS and laser ablation techniques. These ages indicate that the various rocks within the complex were synchronously emplaced at about 1160 Ma. The carbonatite, ijolite and syenite have identical Sr, Nd and Hf isotopic compositions with a 87Sr/86Sr ratio of ~0.70254, and positive εNd(t)1160 and εHf(t)1160 values of ~+3.5 and ~+4.6, respectively, indicating that the silicate and carbonatitic rocks are co-genetic and related by simple fractional crystallization from a magma derived from a weakly depleted mantle. These age determinations extend the period of magmatism in the Midcontinent Rift in the Lake Superior area to 1160 Ma, but do not indicate whether the magmatism is associated with passive continental rifting or the initial stages of plume-induced rifting.

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“…3,14 He gas aer the ablation cell was mixed with Ar sample gas ($1.3 L min À1 ) in a cylindrical mixing chamber with a 70 cm 3 inner volume immediately before reaching the ICP torch. 55 The pulsed signals at low laser repetition rates were sufficiently smoothed out and the washout time for the gas blank level using this mixing device was about 20 s, short enough for normal operations. 10,42 Pre-ablation of the sample surface at the ablation spot was made for 2 s just prior to ablation for all analytical conditions in order to remove surface contamination of Pb and any aerosol deposits ablated in the previous analyses.…”

Section: Instruments and Settingsmentioning

confidence: 96%

“…The linearity of the MFC is superior by over ve to six orders of magnitude (few mV to few V ranges). 19,20 Internal correction for mass fractionation can be made nearly perfect as exemplied by applications in Sr, Nd and Hf isotope analyses using solution or LA-MFC-ICP-MS. [42][43][44] Standard bracketing is also far easier for MFCs because of the stable and linear response. 19,20 Elemental fractionation is still a problem because this is caused at the laser ablation site 27,28 and in the ICP.…”

Section: Introductionmentioning

confidence: 99%

An improved U–Pb age dating method for zircon and monazite using 200/266 nm femtosecond laser ablation and enhanced sensitivity multiple-Faraday collector inductively coupled plasma mass spectrometry

Kimura

Chang

Itano

et al. 2015

J. Anal. At. Spectrom.

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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

Cited by 15 publications

References 39 publications

Meteorite zircon constraints on the bulk Lu−Hf isotope composition and early differentiation of the Earth

Meteorite zircon constraints on the bulk Lu−Hf isotope composition and early differentiation of the Earth

Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada

An improved U–Pb age dating method for zircon and monazite using 200/266 nm femtosecond laser ablation and enhanced sensitivity multiple-Faraday collector inductively coupled plasma mass spectrometry

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