Determination of titanium isotopes in rutiles with high spatial resolution by femtosecond laser ablation multi-collector inductively coupled plasma mass spectrometry

Liu, Hong; Zhang, Wen; Deng, Zhengbin; Hu, Zhaochu; Schiller, Martin; Bizzarro, Martin; Liu, Yongsheng; Luo, Tao; Feng, Yantong; Feng, Lanping

doi:10.1016/j.sab.2023.106646

Cited by 5 publications

(18 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With one exception (i.e., ±0.23‰ for RUS1), the intermediate precisions in δ 49 Ti for the twelve studied Ti‐rich minerals are in the range of ±0.13‰ to ±0.17‰ by fs‐LA‐MC‐ICP‐MS in different sessions (Figure 8), which is comparable to the intermediate precision previously reported in the literature, e.g., ±0.11–0.16‰ for rutile (Liu et al . 2023) and ±0.08–0.15‰ for rutile and ilmenite (Huang et al . 2022).…”

Section: Resultsmentioning

confidence: 99%

“…2022, Liu et al . 2023) and ilmenite (Huang et al . 2022) at a high spatial resolution of 10–30 μm, and δ 49 Ti variation of up to 2.9‰ has been observed among several natural rutile samples (Liu et al .…”

mentioning

confidence: 99%

“…2022) at a high spatial resolution of 10–30 μm, and δ 49 Ti variation of up to 2.9‰ has been observed among several natural rutile samples (Liu et al . 2023). Femtosecond LA rather than ns‐LA generates a smaller and narrower particle‐size distribution and reduces the effect of the heat‐affected zone during ablation of various minerals (Koch et al .…”

mentioning

confidence: 99%

“…2022, Liu et al . 2023). Additional to rutile (TiO 2 ), other Ti‐rich minerals such as ilmenite (FeTiO 3 ), titanite (CaTiSiO 5 ) and perovskite (CaTiO 3 ) are also commonly observed in magmatic, metamorphic and sedimentary rocks.…”

mentioning

confidence: 99%

“…2022, Liu et al . 2023). Here, we propose a protocol for in situ Ti isotopic measurement in ilmenite, titanite and perovskite via fs‐LA‐MC‐ICP‐MS under wet plasma conditions, where a matrix‐matched SSB strategy is used for mass bias correction.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Natural Ti‐Rich Mineral (Ilmenite, Titanite and Perovskite) Reference Materials for In Situ Ti Isotopic Measurement by LA‐MC‐ICP‐MS

Liu,

Deng,

et al. 2023

Geostandard Geoanalytic Res

Self Cite

View full text Add to dashboard Cite

Iron‐titanium oxides such as ilmenite (FeTiO3), titanite (CaTiSiO5) and perovskite (CaTiO3) are the common Ti‐rich mineral phases crystallised during magmatic and metamorphic processes on Earth. Depending on magma types or conditions of phase equilibria, formation of these Ti‐rich minerals can result in Ti isotopic fractionation in the range of ‐1.52‰ to +2.90‰ on δ49TiOL‐Ti (i.e., the per mil difference of 49Ti/47Ti ratio relative to the OL‐Ti reference material), making the Ti isotope ratios of these minerals potential tracers for conditions of magmatism and metamorphism. Due to their resistance to aqueous alteration, these Ti‐rich accessory minerals are also commonly present as pristine, detrital phases in sedimentary rocks, which offer an opportunity to study the evolution of magmatism and metamorphism throughout the Earth's geological history. Here we have developed a novel technique for in situ Ti isotopic measurement in ilmenite, titanite and perovskite using femtosecond laser ablation multi‐collector inductively coupled plasma‐mass spectrometry (fs‐LA‐MC‐ICP‐MS) under wet plasma conditions. Samples were ablated with different laser spot sizes (15–50 μm) and different laser energy densities (0.6–4.2 J cm‐2) to obtain adequate Ti signal intensity at a fixed laser repetition rate of 2 Hz. When 49Ti signal intensity of samples ranged from 0.3 to 3.7 V, no significant signal‐dependent Ti isotopic fractionation was observed under wet plasma conditions. Repeated measurements on twelve Ti‐rich minerals using different analytical protocols provided comparable δ49TiOL‐Ti values within uncertainties, confirming the accuracy of the proposed fs‐LA‐MC‐ICP‐MS method. With one exception (i.e., RUS1), all analysed minerals are homogeneous in their Ti isotopic compositions between individual chips with an intermediate precision of ±0.13‰ to ±0.17‰ (2s) on δ49TiOL‐Ti. Collectively, these minerals record a significant δ49TiOL‐Ti variation ranging from ‐0.46‰ to +2.12‰. These warrant the suitability of these materials as Ti isotopic reference materials for in situ Ti isotopic measurement.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations