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| Yamato 980318 | |||||||||
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| Basic information | Name: Yamato 980318 This is an OFFICIAL meteorite name. Abbreviation: Y-980318 Observed fall: No Year found: 1998 Country: Antarctica [Collected by National Institute of Polar Research, Japan] Mass:  166.8 g | ||||||||
| Classification history: |
This is 1 of 54 approved meteorites classified as Eucrite-cm. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||
| Writeup |
Writeup from MN J10(2):
Sample Name: Yamato 980318 Location: Minami-Yamato Nunataks Dimensions (cm): 6.9 x 4.7 x 3.8 Weight (g): 166.81 Weathering: B/C Fracturing: B Meteorite Type: Eucrite
Macroscopic description This is a subrounded complete stone. 70% of its surface is covered shiny black fusion crust. Exposed interior shows coarse-grained granular texture composed of gray pyroxene and white plagioclase.
Petrographic Description (Yamaguchi A.) The section consists of coarse-grained low-Ca pyroxene and plagioclase (<5 mm) with minor amount of opaque minerals. The low Ca-pyroxene contains exsolution lamellae of augite (~30 μm thick). Pyroxene compositions cluster around Wo2Fs48-49 and Wo45-46Fs18-19. Plagioclase composition is An88-91. This meteorite is a Mg-rich eucrite.
Oxygen isotopic composition (δ18O = +3.18, δ17O = +1.36, Δ17O = -0.29) analyzed by Clayton and Mayeda indicates that this meteorite is an HED. Writeup from MN J21: Yamato 980318 Geochemistry: Oxygen isotope composition (R. Clayton and T. Mayeda, UChi): δ18O = 3.18, δ17O = 1.36, Δ17O = -0.29 | ||||||||
| Plots: | O isotopes: | ||||||||
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| References: | Published in Meteorite newsletter : Japanese collection of Antarctic meteorites /Meteorite newsletter : Japanese collection of Antarctic meteorites ,10(2),1-9 (2001-12) Published in Meteorite newsletter : Japanese collection of Antarctic meteorites /Meteorite newsletter : Japanese collection of Antarctic meteorites ,21,1-33 (2012-06) Never published in the Meteoritical Bulletin
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Geography:
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Statistics: This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||
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| Revision history: |
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