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Allan Hills A78114
Basic information Name: Allan Hills A78114
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA78114
This meteorite may also be called Allan Hills 78114 (ALH 78114) in publications.

Observed fall: No
Year found: 1978
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 808 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 10981 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.: ALHA78114

Location: Allan Hills

Field No.: 382

Weight (gms): 808.1

Meteorite Type: L6 Chondrite

 

Physical Description:

The B surface of the meteorite is planar and contains small patches of dull black Fusion crust on a shiny reddish-brown background, which may possibly be severely weathered fusion crust. All other surfaces of the specimen are totally covered with dull black fusion crusts with the exception of some small areas on the S surface where it has been removed. Small regmaglypts are present on the S surface. Many shallow voids are present on the exterior of this sample. One large fracture that appears to penetrate the stone was noted. This specimen was cleaved along the large crack, which exposed mostly weathered material. The unweathered material exposed during processing is light gray and flecked with light and dark, ~1 mm., clasts.

 

Petrographic Description: Brian Mason

Chondrules are sparse and ill-defined, their borders tending to merge with the granular groundmass which consists mainly of olivine and pyroxene, with minor subequal amounts of nickel-iron and troilite, plagioclase, and accessory chromite. A moderate amount of limonitic staining is associated with the nickel-iron grains. Microprobe analyses give the following compositions: olivine, Fa25; pyroxene, Fs20; Plagioclase, An10. The meteorite is an L6 chondrite. ALHA78114 is another L6 chondrite, similar to ALHA78112 in all respects.

Data from:
  MB76
  Table 2
  Line 338:
Origin or pseudonym:Main icefield
Mass (g):808.1
Class:L6
Weathering grade:B/C
Fayalite (mol%):25
Ferrosilite (mol%):20
Comments:26Al=38±2; NTL=14.9±0.8
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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