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Allan Hills A76007
Basic information Name: Allan Hills A76007
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA76007
This meteorite may also be called Allan Hills 76007 (ALH 76007) in publications.

Observed fall: No
Year found: 1976 or 1977
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 410 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 1(3)  (1978)  L6
Meteoritical Bulletin:  MB 56  (1979)  L6
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 10989 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 MB 56:
Warning: the following text was scanned and may contain character recognition errors. Refer to the original to be sure of accuracy.

DISCOVERY OF THE ALLAN HILLS A76007, ANTARCTICA, STONY METEORITE

Name: ALLAN HILLS A76007

Place of find: West of Allan Nunatak on the edge of the Polar plateau, Victoria Land, Antarctica.

76°40'36"S., 159°13'14"E.

Date of find: January 20, 1977.

Class and type: Stone. Olivine-hypersthene chondrite (L6). Olivine Fa24.4.

Number of individual specimens: 1

Total weight: 410 g

Circumstances of find: Found during a helicopter search over bare ice during the 1976-1977 season of the U.S.-Japan Joint Antarctic Expedition.

Source: K. Yanai, 1978. First meteorites found in Victoria Land, Antarctica, December 1976 and January 1977. Mem. Nat. Inst. Polar Res., Special Issue No. 8, 51-69.

Note: Also known as Allan Nunatak No. 7 and as Allan Hills No. 7. Allan Hills A76007 is the name approved by the Nomenclature Committee of the Meteoritical Society. See also: W.A. Cassidy, E. Olsen and Y. Yanai, 1977. Antarctica: a deep-freeze storehouse for meteorites. Science 198, 727-731, where the coordinates of the find site are given as 76°40'08"S., 159°21'46"E., and E. Olsen et al., 1978. Eleven new meteorites from Antarctica, 1976-1977. Meteoritics 13, 209-225.


[From Antarctic Meteorite Newsletter 4(1):]

Sample No.: ALHA76007

Location: Allan Hills

Field No.:

Weight (gms): 78.5

Meteorite Type: L6 Chondrite

 

Physical Description:

A black fusion crust that is as thick as .5 mm in spots covers the specimen. The fusion crust is both shiny and dull. The crust is rough with the iron oxide staining concentrated in the depressed areas. Iron oxide staining penetrates inward from the exterior of the meteorite. The interior of the meteorite is light gray and contains chondrules up to 2 mm in diameter. Dimensions: ~3.8 x 4.0 x 2.7 cm.

 

Petrographic Description:

This meteorite was described as Allan Hills #7 in Olsen et al., 1978.

Data from:
  MB76
  Table 2
  Line 7:
Origin or pseudonym:Main icefield
Mass (g):410
Class:L6
Weathering grade:B
Fayalite (mol%):24
Ferrosilite (mol%):21
Comments:26Al=45±4
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 1(3) (1978), JSC, Houston
Published in Meteoritical Bulletin, no. 56, Meteoritics 14, 161-175 (1979)
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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Synonymshelp: ALHA767 (Added by JNG 2/23/06)
Allan Hills No. 7 (Added by JNG 2/23/06)
Allan Nunatak No. 7 (Added by JNG 2/23/06)

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