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MacAlpine Hills 88136
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:help 74.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 13(2)  (1990)  E3
AMN 17(1)  (1994)  EL3
Meteoritical Bulletin:  MB 76  (1994)  EL3
NHM Catalogue:  5th Edition  (2000)  EL3
MetBase:  v. 7.1  (2006)  EL3
Recommended:  EL3    [explanation]

This is 1 of 22 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
Writeuphelp
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.

 

Data from:
  MB76
  Table 2
  Line 4684:
Mass (g):74.4
Class:EL3
Weathering grade:A
Ferrosilite (mol%):0-3
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
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Search for this meteorite in the NASA/JSC database (U.S.):   
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:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 13'S, 160° 30'E)
     Recommended::   Unknown

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)

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