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| Elephant Moraine 92023 | |||||||||||||||||||||
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| Basic information | Name: Elephant Moraine 92023 This is an OFFICIAL meteorite name. Abbreviation: EET 92023 Observed fall: No Year found: 1992 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  21.8 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 127 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||
| Writeup |
Writeup from AMN 17(1):
Sample No.: EET92023 Location: Elephant Moraine Dimensions (cm): 3.0 x 2.5 x 2.0 Weight (g): 21.8 Meteorite Type: Eucrite (unbrecciated)
Macroscopic Description : Carol Schwarz About sixty percent of this unbrecciated eucrite is covered with thin black fusion crust which has worn away in areas. The interior is coarse-grained consisting of about 50% white (plagioclase) and 50% yellow-gray minerals. There is only minor weathering apparent.
Thin Section (,2) Description: Brian Mason The section shows a gabbroic texture, an equigranular intergrowth of subhedral to anhedral pyroxene and plagioclase (mean grain size is about 1 mm), with a small amount of opaque material. The pyroxene is a pigeonite of fairly uniform composition, averaging Wo10Fs45; plagioclase composition is An88-91. The meteorite is an unbrecciated eucrite; in texture and mineral compositions it resembles Moore County, but the pyroxene does not show the complex exsolution pattern of Moore County pyroxene.
Writeup from AMN 33(1):
EET
92023 this sample was suggested to be polymict based on
high siderophile element concentrations, but there is no evidence for
breccciation in any sections. Instead it appears that the higher metal
contents are contributing to the high siderophile element concentrations.
Therefore, this sample remains classified as an unbrecciated eucrite. It is
possible that it is a clast from a mesosiderite, but this would require
additional studies to verify.
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| Data from: MB79 Table 2 Line 223: |
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| References: | Published in Antarctic Meteorite Newsletter 17(1) (1994), JSC, Houston Published in Antarctic Meteorite Newsletter 33(1) (2010), JSC, Houston Published in Meteoritical Bulletin, no. 79, MAPS 31, A161-A174 (1996)
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Geography:
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Statistics: This is 1 of 43840 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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