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MacAlpine Hills 88136 | |||||||||||||||||||||||||
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Basic information | Name: MacAlpine Hills 88136 This is an OFFICIAL meteorite name. Abbreviation: MAC 88136 Observed fall: No Year found: 1988 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 26 approved meteorites classified as EL3. [show all] Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites | ||||||||||||||||||||||||
Comments: | Field number: 5726 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from AMN 13(2):
Sample No. MAC88136 Location: MacAlpine Hills Dimensions (cm): 4x4x2.5 Field Number: 5726 Weight (g): 74.4 Meteorite Type: E3 chondrite
Macroscopic Description: Carol Schwarz Rusty, smooth, unfractured fusion crust covers 70% of this chondrite. The interior is black and fine-grained with abundant metal evenly disseminated throughout. One 1 mm chondrule was exposed on the freshly broken surface. Except for one small corner, oxidation appears to be minimal.
Thin Section (,3) Description: Brian Mason Chondrules and chondrule fragments are abundant, ranging up to 2.4 mm across; they consist of granular or cryptocrystalline pyroxene. The matrix consists largely of small pyroxene grains, with some nickel-iron and minor sulfides. One ellipsoid (chondrule?) of metal, 1.1 x 1.5 mm, is present in the section. Microprobe analyses show that the pyroxene is clinoenstatite, with variable but low iron content (FeO 0.1-2.1%); the metal grains show a low and variable silicon content, ranging up to 0.5%. The meteorite is tentatively classified as an E3 enstatite chondrite, but the metal has a lower Si content than is usual for these meteorites. MAC88136 resembles MAC88180 and MAC88184; the possibility of pairing should be considered.
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Data from: MB76 Table 2 Line 4684: |
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Plots: | O isotopes: | ||||||||||||||||||||||||
Catalogs: |
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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 44248 approved meteorites from Antarctica (plus 3802 unapproved names) |