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| Yamato 000027 | |||||||||
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| Basic information | Name: Yamato 000027 This is an OFFICIAL meteorite name. Abbreviation: Y-000027 Observed fall: No Year found: 2000 Country: Antarctica [Collected by National Institute of Polar Research, Japan] Mass:  9.7 g | ||||||||
| Classification history: |
This is 1 of 329 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||
| Comments: | Approved 28 Mar 2006 | ||||||||
| Writeup |
Writeup from MN J14(1):
Sample Name: Yamato 000027 Location: Yamato Mountains Dimensions (cm): 2.0x2.0x1.6 Weight (g): 9.68 Weathering: A Fracturing: A Meteorite Type: Lherzolitic shergottite
Macroscopic description
This is a subrounded stone. A small patch of shiny black fusion crust remains on one plane surface. Exposed interior shows fine-grained granular texture. Thick (2 mm) black shock vein penetrates the stone.
Petrographic Description
The section shows a typical poikilitic texture. Large oikocrysts of pyroxene enclose olivines and oxide minerals. Minor maskelynites are observed. Low-Ca pyroxene has a mean composition of Fs23.1Wo3.6. Olivine has a mean composition of Fa32.6. Mean composition of maskelynite is An56.9. The oxygen isotopic composition (analyzed by I. Franchi) of a bulk rock sample that is δ18O=4.129, δ17Ο=2.446, Δ17O=0.299, indicates that the meteorite is martian origin. | ||||||||
| Plots: | O isotopes: | ||||||||
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| References: | Published in Meteorite newsletter : Japanese collection of Antarctic meteorites /Meteorite newsletter : Japanese collection of Antarctic meteorites ,14, (2006-03) Never published in the Meteoritical Bulletin
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Geography:
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Statistics: This is 1 of 45041 approved meteorites from Antarctica (plus 3472 unapproved names) | ||||||||