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Allan Hills A78127
Basic information Name: Allan Hills A78127
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA78127
This meteorite may also be called Allan Hills 78127 (ALH 78127) in publications.

Observed fall: No
Year found: 1978
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 194.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 3(2)  (1980)  L6
Meteoritical Bulletin:  MB 76  (1994)  L6
NHM Catalogue:  5th Edition  (2000)  L6
NIPR Catalogue:  2000 Edition  (2000)  L6
MetBase:  v. 7.1  (2006)  L6
Recommended:  L6    [explanation]

This is 1 of 10991 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 3(2):
This text was reprinted from AMN 3(2) in AMN 4(1). In some cases, it may be an updated version from the original.

Sample No.: ALHA78127

Location: Allan Hills

Field No.: 495

Weight (gms): 194.5

Meteorite Type: L6 Chondrite

 

Physical Description:

Sample is covered with very thin, shiny fusion crust on the T, B, N and W surfaces. The S surface has remnant patches of fusion crust and the E surface is a fracture surface. The B surface is partially stained by iron oxidation. Where fusion crust is absent, the sample is reddish-brown. Polygonal fractures cover most surfaces. Chipping the sample during processing revealed that nearly the entire sample is severely weathered. One small area of the matrix is not severely weathered and is yellowish gray.

 

Petrographic Description: Brian Mason

Chondritic structure is poorly developed, the sparse chondrules tending to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor subequal amounts of nickel-iron and troilite, a little plagioclase, and accessory chromite. Minor limonitic staining is associated with the metal grains. Microprobe analyses gave the following compositions: olivine, Fa24; orthopyroxene, Fs20; plagioclase, An10; and a single grain of diopside, Wo46En47Fs7. The meteorite is classified as an L6 chondrite.

Data from:
  MB76
  Table 2
  Line 350:
Origin or pseudonym:Main icefield
Mass (g):194.5
Class:L6
Weathering grade:B/C
Fayalite (mol%):24
Ferrosilite (mol%):20
Comments:26Al=46±3
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 3(2) (1980), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 43'S, 159° 40'E)

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