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Elephant Moraine 83322 | |||||||||||||||||||||
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Basic information | Name: Elephant Moraine 83322 This is an OFFICIAL meteorite name. Abbreviation: EET 83322 Observed fall: No Year found: 1983 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: ![]() | ||||||||||||||||||||
Classification history: |
This is 1 of 142 approved meteorites classified as EH3. [show all] Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites | ||||||||||||||||||||
Writeup![]() |
Writeup from AMN 9(1):
Sample No.: EET83322 Location: Elephant Moraine Weight (g): 14.3 Field No.: 2849 Dimensions (cm): 3 x 2.5 x 2 Meteorite Type: E4 Chondrite
Macroscopic Description: Roberta Score One small patch of fusion crust is present on the iridescent reddish-brown exterior of this stone. Interior is black and speckled with small (<1 mm) inclusions. Abundant black minerals show well-developed crystal faces. Metal may be present. Minor oxidation haloes are visible. Stone is very cohesive.
Thin Section (,2) Description: Brian Mason Chondrules and chondrule fragments are fairly abundant, and are set in a granular matrix of pyroxene, nickel-iron, and sulfides. The chondrules range up to 0.9 mm in diameter, and consist of granular pyroxene, except for a few made up of nickel-iron and sulfide. A minor amount of brown limonitic staining is present. Microprobe analyses show that the pyroxene is close to MgSiO3 in composition (FeO 0.2-1.7, mean 0.6%; Al2O3 0.04-1.1, mean 0.3%; CaO 0.1-0.5, mean 0.3%; TiO2 0.04-0.24, mean 0.05%; MnO 0.04-0.24, mean 0.13%). The nickel-iron contains about 2.2% Si. Since part of the pyroxene is polysynthetically twinned clinoenstatite, the meteorite is classified as an E4 chondrite. It is similar to EET83307 and the possibility of pairing should be considered. | ||||||||||||||||||||
Data from: MB76 Table 2 Line 1584: |
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Plots: | O isotopes: | ||||||||||||||||||||
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References: | Published in Antarctic Meteorite Newsletter 9(1) (1986), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:![]() |
Statistics: This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
Proximity search: |