Laser ablation split-stream analysis of the Sm-Nd and U-Pb isotope compositions of monazite, titanite, and apatite – Improvements, potential reference materials, and application to the Archean Saglek Block gneisses

Fisher, C. M.; Bauer, Ann M.; Luo, Yi; Sarkar, C. K.; Hanchar, John M.; Vervoort, Jeffrey D.; Tapster, Simon; Horstwood, Matthew; Pearson, D. Graham

doi:10.1016/j.chemgeo.2020.119493

Cited by 53 publications

(48 citation statements)

References 78 publications

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“…"Old zircons never die" but time leaves indelible scars on their geochemical DNA that are testimony of the diversity of events they went through. This can be seen as a blessing rather than a curse providing high spatial resolution and high precision analyses can be performed in order to unravel and pinpoint the vast information recorded in tiny intra-crystalline domains of single zircon crystals as well as other accessories (e.g., Fisher et al, 2020). Zheng et al (2011).…”

Section: Resultsmentioning

confidence: 99%

A case study of in situ analyses (major and trace elements, U-Pb geochronology and Hf-O isotopes) of a zircon megacryst: Implication for the evolution of the Egéré terrane (Central Hoggar, Tuareg Shield, Algeria)

Bruguier

Caby

Bosch

et al. 2020

Precambrian Research

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Section: Resultsmentioning

confidence: 99%

A case study of in situ analyses (major and trace elements, U-Pb geochronology and Hf-O isotopes) of a zircon megacryst: Implication for the evolution of the Egéré terrane (Central Hoggar, Tuareg Shield, Algeria)

Bruguier

Caby

Bosch

et al. 2020

Precambrian Research

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“…xxx-xxx "Old zircons never die" but time leaves indelible scars on their geochemical DNA that are testimony of the diversity of events they went through. This can be seen as a blessing rather than a curse providing high spatial resolution and high precision analyses can be performed in order to unravel and pinpoint the vast information recorded in tiny intra-crystalline domains of single zircon crystals as well as other accessories (e.g., Fisher et al, 2020). Zheng et al (2011).…”

Section: Uncited Referencementioning

confidence: 99%

A case study of in situ analyses (major and trace elements, U-Pb geochronology and Hf-O isotopes) of a zircon megacryst: implication for the evolution of the Egéré terrane (Central Hoggar, Tuareg Shield, Algeria)

Bruguier¹,

Caby²,

Bosch³

et al. 2021

Goldschmidt2021 Abstracts

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“…Combining the approach in this study and in situ isotopic analysis, with a focus on how the accessory phases are distributed could provide further insight into the formation, composition and evolution of difficult samples that have been affected by secondary processes. In situ isotopic analysis (e.g., Sm-Nd) of datable REE, Th, U-bearing accessory phases has recently become a useful tool for investigating crustal evolution as the age data, isotopic information and trace element systematics can be combined to assess if (and when) the whole rock Sm-Nd system has been disturbed [41][42][43][44].…”

Section: Distribution Of the Trace Elementsmentioning

confidence: 99%

A Reconstitution Approach for Whole Rock Major and Trace Element Compositions of Granulites from the Kapuskasing Structural Zone

Emo

Kamber

2020

Minerals

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Current estimates for the composition of the lower continental crust show significant variation for the concentrations of the highly incompatible elements, including large uncertainties for the heat-producing elements. This has consequences for models of the formation of lower crust. For example, is lower continental crust inherently poor in incompatible elements or has it become so after extraction of partial melts caused by thermal incubation? Answering these questions will require better agreement between estimates for the chemistry of the lower crust. One issue is that granulite samples may have been altered during ascent. Xenoliths often experience contamination from the entraining alkaline magma, potentially resulting in elevated concentrations of incompatible trace elements when analysed by conventional bulk rock techniques. To avoid this, we assessed an in situ approach for reconstructing whole rock compositions with granulites from the Kapuskasing Structural Zone, Superior Province, Canada. As terrain samples, they have not been affected by host magma contamination, and as subrecent glacial exposures, they show minimal modern weathering. We used scanning electron microscope electron dispersive spectroscopy (SEM-EDS) phase mapping to establish the modal mineralogy. Major and trace element concentrations of mineral phases were determined by electron microprobe and laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS), respectively. These concentrations were combined with the modal mineralogies to obtain reconstructed whole rock compositions, which were compared to conventional bulk rock analyses. The reconstructed data show good reproducibility relative to the conventional analyses for samples with massive textures. However, the conventional bulk rock chemistry systematically yields higher K concentrations, which are hosted in altered feldspars. Thus, even in terrain samples, minor alteration can lead to elevated incompatible element estimates that may not represent genuine lower continental crust.

show abstract

Laser ablation split-stream analysis of the Sm-Nd and U-Pb isotope compositions of monazite, titanite, and apatite – Improvements, potential reference materials, and application to the Archean Saglek Block gneisses

Cited by 53 publications

References 78 publications

A case study of in situ analyses (major and trace elements, U-Pb geochronology and Hf-O isotopes) of a zircon megacryst: Implication for the evolution of the Egéré terrane (Central Hoggar, Tuareg Shield, Algeria)

A case study of in situ analyses (major and trace elements, U-Pb geochronology and Hf-O isotopes) of a zircon megacryst: Implication for the evolution of the Egéré terrane (Central Hoggar, Tuareg Shield, Algeria)

A case study of in situ analyses (major and trace elements, U-Pb geochronology and Hf-O isotopes) of a zircon megacryst: implication for the evolution of the Egéré terrane (Central Hoggar, Tuareg Shield, Algeria)

A Reconstitution Approach for Whole Rock Major and Trace Element Compositions of Granulites from the Kapuskasing Structural Zone

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