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Allan Hills A78130
Basic information Name: Allan Hills A78130
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA78130
This meteorite may also be called Allan Hills 78130 (ALH 78130) in publications.

Observed fall: No
Year found: 1978
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 2.73 kg
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 11000 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.: ALHA78130

Location: Allan Hills

Field No.: 336

Weight (gms): 2733.0

Meteorite Type: L6 Chondrite

 

Physical Description:

This specimen, 18 x 9 x 9 cm , is completely covered with a thin, dull black fusion crust, with the exception, of an ~4 x 4 cm. area on the W surface and along the edges of the sample. Preferential weathering of the fusion crust around included clasts occurs. The sample is covered with shallow regmaglypts and several large fractures penetrate the sample. Chipping of the sample during processing revealed a severely oxidized interior for ~70% of the sample. The unweathered portion is light gray and speckled with light and dark clasts, ~1-2 mm.. Several larger (~0.5 cm.) gray clasts were noted. Small veins of a darker gray material, ~2-3 cm. in length and 3 mm. wide, are present in the lighter matrix material.

 

Petrographic Description: Brian Mason

Chondrules are sparse and poorly defined, their borders tending to merge with the granular groundmass, which consists largely of olivine and pyroxene with minor subequal amounts of nickel-iron and troilite, plagioclase, and accessory chromite. A moderate amount of brown limonitic staining is present around the nickel-iron grains. Microprobe analyses give the following compositions: olivine, Fa25; pyroxene, Fs21; plagioclase, An10. The meteorite is an L6 chondrite. ALHA78130, 78131 are L6 chondrites similar in all respects to ALHA78126.

Data from:
  MB76
  Table 2
  Line 353:
Origin or pseudonym:Main icefield
Mass (g):2733
Class:L6
Weathering grade:B/C
Fayalite (mol%):25
Ferrosilite (mol%):21
Comments:26Al=51±4
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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