Hafnium isotopes and Zr/Hf of rutile and zircon from lower crustal metapelites (Ivrea–Verbano Zone, Italy): Implications for chemical differentiation of the crust

Ewing, Tanya A.; Rubatto, Daniela; Hermann, Jörg

doi:10.1016/j.epsl.2013.12.029

Cited by 40 publications

(19 citation statements)

References 44 publications

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“…(2018), local occurrences of granulite‐facies metapelites ( V p = 6.3–7.2 km s −1 , V s = 3.8–4.1 km s −1 ; Weiss et al., 1999; Khazenehdari et al., 2000). North of the Po Plain, similar granulite facies metapelites are also exposed at Earth's surface (e.g., Ewing et al., 2014). In the region labeled as ALC 1 (Figure 6c), the locally high V p / V s ratios >1.8 associated to V p ∼7.0–7.3 km s −1 may be interpreted as gabbro underplated at the base of the Adriatic lower crust.…”

Section: Absolute Velocity Structure Of the Crust And The Mantle Wedgementioning

confidence: 99%

The Deep Structure of the Alps Based on the CIFALPS Seismic Experiment: A Synthesis

Malusà

Guillot

Zhao

et al. 2021

Geochem Geophys Geosyst

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The European Alps are the site where classic geologic concepts such as nappe theory, continental subduction, and slab breakoff have been first proposed. However, the deep tectonic structure of the Alps has long been poorly constrained by independent geophysical evidence. This review paper summarizes the main results of the CIFALPS passive seismic experiment, which allows us to propose an updated image of the deep structure of the Alps at the scale of the lithosphere and the upper mantle. The concepts and ideas summarized in this article provide a baseline for further advances in the fields of Alpine tectonics and in the analysis of active continental margins more generally. MALUSÀ ET AL.

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Section: Absolute Velocity Structure Of the Crust And The Mantle Wedgementioning

confidence: 99%

The Deep Structure of the Alps Based on the CIFALPS Seismic Experiment: A Synthesis

Malusà

Guillot

Zhao

et al. 2021

Geochem Geophys Geosyst

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“…Atom probe specimens (1–8) were prepared from two ~200 µ m grains of the WHQ rutile reference material (Clark et al, 2000) mounted in epoxy. The rutile has a 207 Pb/ 206 Pb thermal ionization mass spectrometry (TIMS) age of 2642 Ma (precision not quoted) (Ewing, 2011, and references therein). The rutile is ~99 wt% TiO 2 with Cr (10,643 ± 3,227 µ g/g) and V (1,355 ± 748 µ g/g) (Ewing, 2011, and references therein).…”

Section: Sample Descriptionmentioning

confidence: 99%

“…The rutile has a 207 Pb/ 206 Pb thermal ionization mass spectrometry (TIMS) age of 2642 Ma (precision not quoted) (Ewing, 2011, and references therein). The rutile is ~99 wt% TiO 2 with Cr (10,643 ± 3,227 µ g/g) and V (1,355 ± 748 µ g/g) (Ewing, 2011, and references therein). The presence of these elements is of great importance as both have the potential for isotopic interference with Ti and with trace elements of interest—e.g.…”

Section: Sample Descriptionmentioning

confidence: 99%

Analysis of Natural Rutile (TiO₂) by Laser-assisted Atom Probe Tomography

et al. 2019

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Since the introduction of laser-assisted atom probe, analysis of nonconductive materials by atom probe tomography (APT) has become more routine. To obtain high-quality data, a number of acquisition variables needs to be optimized for the material of interest, and for the specific question being addressed. Here, the rutile (TiO2) reference material ‘Windmill Hill Quartzite,’ used for secondary ion mass spectrometry U–Pb dating and laser-ablation inductively coupled plasma mass spectrometry, was analyzed by laser-assisted APT to constrain optimal running conditions. Changes in acquisition parameters such as laser energy and detection rate are evaluated in terms of their effect on background noise, ionization state, hit-multiplicity, and thermal tails. Higher laser energy results in the formation of more complex molecular ions and affects the ionization charge state. At lower energies, background noise and hit-multiplicity increase, but thermal tails shorten. There are also correlations between the acquisition voltage and several of these metrics, which remain to be fully understood. The results observed when varying the acquisition parameters will be discussed in detail in the context of utilizing APT analysis of rutile within geology.

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“…, Ewing et al . ). Due to its preference for high field‐strength elements, rutile has found applications in provenance studies where the Cr/Nb ratio is suggested to indicate a metabasic or metapelitic origin (e.g., Zack et al .…”

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confidence: 97%

Rutile R632 – A New Natural Reference Material for U‐Pb and Zr Determination

Axelsson

Pape

Berndt

et al. 2018

Geostandard Geoanalytic Res

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A new natural rutile reference material is presented, suitable for U‐Pb dating and Zr‐in‐rutile thermometry by microbeam methods. U‐Pb dating of rutile R632 using laser ablation ICP‐MS with both magnetic sector field and quadrupole instruments as well as isotope dilution‐thermal ionisation mass spectrometry yielded a concordia age of 496 ± 2 Ma. The high U content (> 300 μg g−1) enabled measurement of high‐precision U‐Pb ages despite its young age. The sample was found to have a Zr content of 4294 ± 196 μg g−1, which makes it an excellent complementary reference material for Zr‐in‐rutile thermometry. Individual rutile grains have homogeneous compositions of a number of other trace elements including V, Cr, Fe, Nb, Mo, Sn, Sb, Hf, Ta and W. This newly characterised material significantly expands the range of available rutile reference materials relevant for age and temperature determinations.

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Hafnium isotopes and Zr/Hf of rutile and zircon from lower crustal metapelites (Ivrea–Verbano Zone, Italy): Implications for chemical differentiation of the crust

Cited by 40 publications

References 44 publications

The Deep Structure of the Alps Based on the CIFALPS Seismic Experiment: A Synthesis

The Deep Structure of the Alps Based on the CIFALPS Seismic Experiment: A Synthesis

Analysis of Natural Rutile (TiO₂) by Laser-assisted Atom Probe Tomography

Rutile R632 – A New Natural Reference Material for U‐Pb and Zr Determination

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Hafnium isotopes and Zr/Hf of rutile and zircon from lower crustal metapelites (Ivrea–Verbano Zone, Italy): Implications for chemical differentiation of the crust

Cited by 40 publications

References 44 publications

The Deep Structure of the Alps Based on the CIFALPS Seismic Experiment: A Synthesis

The Deep Structure of the Alps Based on the CIFALPS Seismic Experiment: A Synthesis

Analysis of Natural Rutile (TiO2) by Laser-assisted Atom Probe Tomography

Rutile R632 – A New Natural Reference Material for U‐Pb and Zr Determination

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Product

Resources

About

Analysis of Natural Rutile (TiO₂) by Laser-assisted Atom Probe Tomography