Terrestrial history of antarctic meteorites recorded in the cosmogenic nuclides.

Honda, M.

doi:10.2343/geochemj.15.163

Cited by 12 publications

(8 citation statements)

References 14 publications

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“…Pyroxene composition is in mole percent FeSiO 3 (Fs). Rare gas data are from Takaoka et al (1981) and Honda (1981). 53 Mn data are from Nishiizumi et al (1980).…”

Section: Combustionmentioning

confidence: 99%

“…Samples might be fragments of a large object or members of a shower, and they seem to belong to a single meteorite fall. Y-75102 has been reported to be paired with Y-74190 (L6), Y-75097 (L6), Y-75108 (L6), and Y-75271 (L6) (Honda 1981;Takaoka et al 1981;Takaoka 1987). Honda (1981) also reported that the samples from Y-75108 to Y-75257, which were recovered from very small areas of 10 m × 50 m, seem to have originated from a meteorite.…”

Section: Introductionmentioning

confidence: 99%

“…Y-75102 has been reported to be paired with Y-74190 (L6), Y-75097 (L6), Y-75108 (L6), and Y-75271 (L6) (Honda 1981;Takaoka et al 1981;Takaoka 1987). Honda (1981) also reported that the samples from Y-75108 to Y-75257, which were recovered from very small areas of 10 m × 50 m, seem to have originated from a meteorite. These samples were found at 71°50′S, 35°30′E in the Yamato Mountains, eastern Queen Maud Land, Antarctica.…”

Section: Introductionmentioning

confidence: 99%

“…Another purpose of this study is the identification of paired meteorites. Antarctic meteorites are composed of overlapping falls, which are superimposed mixtures of meteorite showers, and multiple or single meteorite falls (Honda 1981). Pairing means identifying collected meteorite specimens as fragments of a single fall.…”

Section: Introductionmentioning

confidence: 99%

“…After consideration of the shielding effect by using 22 Ne/ 21 Ne values, we obtained about 1.8 kyr for the terrestrial age of this chondrite. The five samples Y-74190, Y-75097, and Y-75108, together with Y-75102 (L6) and Y-75271 (L6), have been reported to be paired and fragments of an L-chondrite shower (Honda 1981;Takaoka 1987). The result of this work and literature data for the latter two samples confirmed that they are paired.…”

mentioning

confidence: 99%

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An improved extraction system to measure carbon‐14 terrestrial ages of meteorites and pairing of the Antarctic Yamato‐75097 group chondrites

Minami¹,

Terui²,

Takaoka³

et al. 2006

Meteorit & Planetary Scien

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Abstract-We examined an improved system for extraction of carbon from meteorites, using a vacuum-tight RF melting method. Meteorite samples mixed with an iron combustion accelerator, including a specific amount of carbon (0.052%), were combusted in a RF furnace (LECO HF-10). 14 CO 2 extracted from the meteorite was diluted with a known amount of nearly 14 C-free CO 2 ,evolved from the iron accelerator on combustion. The 14 C activities of the recently fallen Holbrook (L6) and Mt. Tazerzait (L5) meteorites were measured by this method. The mean value was 56.5 ± 3.0 dpm/kg, which is similar to the values reported for recently fallen L6 chondrites. Furthermore, terrestrial ages were measured for four Antarctic meteorites: 1.8 ± 0. (Honda 1981;Takaoka 1987). The result of this work and literature data for the latter two samples confirmed that they are paired. More discussion and experimental work are needed for other recently fallen meteorites, both for L and H chondrites, and a correction for the shielding effect should be done to determine a more reliable terrestrial age.

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“…Pyroxene composition is in mole percent FeSiO 3 (Fs). Rare gas data are from Takaoka et al (1981) and Honda (1981). 53 Mn data are from Nishiizumi et al (1980).…”

Section: Combustionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%