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MacAlpine Hills 87310
Basic information Name: MacAlpine Hills 87310
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 87310
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 411 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 11(2)  (1988)  L4
Meteoritical Bulletin:  MB 76  (1994)  L4
NHM Catalogue:  5th Edition  (2000)  L4
MetBase:  v. 7.1  (2006)  L4
Recommended:  L4    [explanation]

This is 1 of 1707 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Field number: 4545
Writeuphelp
Writeup from AMN 11(2):

Sample No.: MAC87310

Location: MacAlpine Hills

Weight (g): 411.0

Field No.: 4545

Dimensions (cm): 7 x 7 x 5

Meteorite Type: L4 Chondrite with enclave

 

Macroscopic Description: René Martinez

The interior of this meteorite is dark gray with light and dark irregular inclusions and chondrules. The specimen is nearly spherical and very coherent. No fusion crust remains. The specimen was sawn to sample the interior and contaminated slightly with oil in the process.

 

Thin Section (,14) Description: Brian Mason

The section shows abundant chondrules and chondrule fragments (up to 1.8 mm across) in a fine-grained matrix of olivine and pyroxene, with minor nickel-iron and troilite. In the center of the section is an angular clast, 6 x 3 mm, consisting essentially of fine-grained (0.05 mm) olivine. Mineral compositions of the main part are: olivine, Fa23; pyroxene, Fs19. Clast olivine is Fa14-20. The meteorite is an L4 chondrite, but the clast is clearly foreign.

Data from:
  MB76
  Table 2
  Line 4637:
Mass (g):411
Class:L4
Weathering grade:A/B
Fayalite (mol%):23
Ferrosilite (mol%):19
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 11(2) (1988), 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° 16' 27"S, 159° 39' 54"E)
Note: the NHM and recommended coordinates are 11.3 km apart

Statistics:
     This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names)
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