Intermineral oxygen three‐isotope systematics of silicate minerals in equilibrated ordinary chondrites

High‐precision oxygen three‐isotope ratios were measured for four mineral phases (olivine, low‐Ca and high‐Ca pyroxene, and plagioclase) in equilibrated ordinary chondrites (EOCs) using a secondary ion mass spectrometer. Eleven EOCs were studied that cover all groups (H, L, LL) and petrologic types...

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Bibliographic Details
Published in:Meteoritics & planetary science 2017-11, Vol.52 (11), p.2322-2342
Main Authors: McDougal, David, Nakashima, Daisuke, Tenner, Travis J., Kita, Noriko T., Valley, John W., Noguchi, Takaaki
Format: Article
Language:English
Subjects:
Chondrites
Diffusion rate
Fractionation
Isotope ratios
Isotopes
Metamorphism
Metamorphism (geology)
Meteorites
Meteors & meteorites
Minerals
Olivine
Oxygen
Plagioclase
Pyroxenes
Secondary ion mass spectrometry
Systematics
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Summary:High‐precision oxygen three‐isotope ratios were measured for four mineral phases (olivine, low‐Ca and high‐Ca pyroxene, and plagioclase) in equilibrated ordinary chondrites (EOCs) using a secondary ion mass spectrometer. Eleven EOCs were studied that cover all groups (H, L, LL) and petrologic types (4, 5, 6), including S1–S4 shock stages, as well as unbrecciated and brecciated meteorites. SIMS analyses of multiple minerals were made in close proximity (mostly
ISSN:1086-9379
1945-5100
DOI:10.1111/maps.12932