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MacAlpine Hills 88177 | |||||||||||||||||||||||||
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Basic information | Name: MacAlpine Hills 88177 This is an OFFICIAL meteorite name. Abbreviation: MAC 88177 Observed fall: No Year found: 1988 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 89 approved meteorites classified as Lodranite. [show all] Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites | ||||||||||||||||||||||||
Comments: | Field number: 5740 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from AMN 13(2):
Sample No. MAC88177 Location: MacAlpine Hills Dimensions (cm): 4.2x3x1.5 Field Number: 5740 Weight (g): 35.3 Meteorite Type: Ureilite
Macroscopic Description: Roberta Score MAC88177 is a dome-shaped stone covered with flow-marked black and gray fusion crust on the top and frothy fusion crust on the bottom. The interior of the stone is heavily oxidized and much of it is orange. The less weathered matrix is buff colored. Several thin black veins criss-cross the interior.
Thin Section (,3) Description: Brian Mason The section shows an equigranular aggregate of anhedral to subhedral olivine and pyroxene (grains 0.3-0.6 mm across), with minor troilite and accessory amounts of nickel-iron and chromite. Shock effects include undulose extinction in the silicate grains, mosaic structure in troilite, and minor veining. Some weathering is indicated by small areas of brown limonite and limonitic staining along veins. Microprobe analyses show olivine and pyroxene of uniform composition: olivine, Fa13; pyroxene, Wo4Fs12. The meteorite is classified as a ureilite, but it lacks the carbonaceous material characteristic of ureilites, and the olivine contains less than 0.1 % Ca and Cr. | ||||||||||||||||||||||||
Data from: MB76 Table 2 Line 4725: |
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References: | Published in Antarctic Meteorite Newsletter 13(2) (1990), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:![]() |
Statistics: This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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