Neutron activation analysis of iron meteorites

Shirai, Naoki; Hidaka, Y.; Yamaguchi, A.; Sekimoto, Shun; Ebihara, Mitsuru; Kojima, H.

doi:10.1007/s10967-014-3654-4

Cited by 13 publications

(5 citation statements)

References 21 publications

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“…; Petaev and Jacobsen ; Shirai et al. ) (Table ). However, for Dronino and Muonionalusta, there are clear differences between our data and literature values in Ga, Ge, and As (Muonionalusta: Wasson and Richardson ; Dronino: Russell et al.…”

Section: Resultsmentioning

confidence: 99%

“…These moderately volatile elements are depleted in type IV and some other iron meteorites (e.g., Shirai et al. and references therein). For Ge and As, there are spectral interferences due to 54, 56, 57, 58 Fe 16, 17, 18 O and 59 Co 16 O.…”

Section: Resultsmentioning

confidence: 99%

“…(), (2) Shirai et al. (), (3) Petaev and Jacobsen (), (4) Wasson and Richardson (), and (5) Russell et al. ().…”

Section: Resultsmentioning

confidence: 99%

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Siderophile element characteristics of acapulcoite–lodranites and winonaites: Implications for the early differentiation processes of their parent bodies

Hidaka

Shirai

Yamaguchi

et al. 2019

Meteorit & Planetary Scien

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We have studied magnetic fractions of five acapulcoites, three lodranites, and two winonaites to investigate chemical compositions of their precursor materials and metallic partial melting processes occurring on their parent bodies. One winonaite metal is similar in composition to low Au, low Ni IAB iron subgroup, indicating genetic relationship between them. Magnetic fractions of chondrule-bearing acapulcoite and winonaite have intermediate chemical compositions of metals between H chondrites and EL chondrites. This fact indicates that the precursor materials of acapulcoite-lodranites and winonaites were similar to H and/or EL chondrites in chemical compositions. Magnetic fractions in acapulcoitelodranites have a large variety of chemical compositions. Most of them show enrichments of W, Re, Ir, Pt, Mo, and Rh, and one of them shows clear depletion in Re and Ir relative to those of chondrule-bearing acapulcoite. Chemical compositional variations among acapulcoite-lodranite metals cannot be explained by a single Fe-Ni-S partial melting event, but a two-step partial melting model can explain it.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Siderophile element characteristics of acapulcoite–lodranites and winonaites: Implications for the early differentiation processes of their parent bodies

Hidaka

Shirai

Yamaguchi

et al. 2019

Meteorit & Planetary Scien

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“…Shirai et al . () modified an INAA protocol to analyse and classify iron meteorites based on chemical composition. Canyon Diablo and Cape York iron meteorite samples, having respective masses of 0.116 and 0.189 g, were sawn into 1 mm × 1 mm × 4 mm plates.…”

Section: Developments In Instrumental Neutron Activation Analysis Andmentioning

confidence: 99%

“…Claimed detection limits (all in picograms for a 0.05 lg meteorite) were, for example, 20 for Na, 0.4 for Sc, 2800 for Fe, 0.3 for Ir and 0.02 for Au. Shirai et al (2015) modified an INAA protocol to analyse and classify iron meteorites based on chemical composition. Canyon Diablo and Cape York iron meteorite samples, having respective masses of 0.116 and 0.189 g, were sawn into 1 mm 9 1 mm 9 4 mm plates.…”

Section: Instrumental Neutron Activation Analysismentioning

confidence: 99%

GGR Biennial Critical Review: Analytical Developments Since 2014

Linge

Bèdard

Bugoi

et al. 2017

Geostandard Geoanalytic Res

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This GGR biennial critical review covers developments and innovations in key analytical methods published since January 2014, relevant to the chemical, isotopic and crystallographic characterisation of geological and environmental materials. In nine selected analytical fields, publications considered to be of wide significance are summarised, background information is provided and their importance evaluated. In addition to instrumental technologies, this review also presents a summary of new developments in the preparation and characterisation of rock, microanalytical and isotopic reference materials, including a précis of recent changes and revisions to ISO guidelines for reference material characterisation and reporting. Selected reports are provided of isotope ratio analyses by both solution-nebulisation MC-ICP-MS and laser ablation-ICP-MS, as well as of radioactive isotope geochronology by LA-ICP-MS. Most of the analytical techniques elaborated continue to provide new applications for geochemical analysis, however it is noted that instrumental neutron activation analysis has become less popular in recent years, mostly due to the reduced availability of nuclear reactors to act as a neutron source. Many of the newer applications reported here provide analysis at increasingly finer resolution. Examples include atom probe tomography, a very sensitive method providing atomic scale information, nanoscale SIMS, for isotopic imaging of geological and biological samples, and micro-XRF, which has a spatial resolution many orders of magnitude smaller than conventional XRF

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