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MacAlpine Hills 88180
Basic information Name: MacAlpine Hills 88180
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 88180
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 26.6 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: 5567
Writeuphelp
Writeup from AMN 13(2):

Sample No. MAC88180

Location: MacAlpine Hills

Dimensions (cm): 3.8x2.5x2.5

Field Number: 5547

Weight (g): 26.6

Meteorite Type: E3 chondrite

 

Macroscopic Description: Robbie Marlow

Fusion crust totally covers this extremely weathered and fractured meteorite. The interior structure has been obliterated by oxidation. Only large orange-brown rust spots are visible.

 

Thin Section (,3) Description: Brian Mason

Much of the section is occupied by a single large chondrule, 5 mm across; the remainder of the section consists of small chondrules and chondrule fragments in matrix consisting largely of small pyroxene grains, with some nickel-iron and sulfides. The silicate material appears to be entirely clinoenstatite. Microprobe analyses show the clinoenstatite of slightly variable compositions, with FeO 0.2-0.8% and CaO 0.1-0.4%; the metal grains have a variable Si content, 0.2-2.0%. The meteorite is tentatively identified as an E3 chondrite. It resembles MAC88136 and 88184, and the possibility of pairing should be considered.

Data from:
  MB76
  Table 2
  Line 4728:
Mass (g):26.6
Class:EL3
Weathering grade:C
Ferrosilite (mol%):0.3-1.2
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:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 13'S, 160° 30'E)
     Recommended::   (84° 18' 54"S, 159° 45' 18"E)
Note: the NHM and recommended coordinates are 13.8 km apart

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