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Allan Hills A80110
Basic information Name: Allan Hills A80110
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA80110
This meteorite may also be called Allan Hills 80110 (ALH 80110) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 167.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 4(2)  (1981)  L6
Meteoritical Bulletin:  MB 76  (1994)  L6
NHM Catalogue:  5th 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 4(2):

Sample No.: ALHA80110

Location: Allan Hills

Field No.: 1062

Weight (gms): 167.6

Meteorite Type: L6 Chondrite

 

Physical Description: Roberta Score

Only a small patch of weathered fusion crust remains on the exterior of-this specimen. The interior is relatively fresh with metal obvious. A 2 mm discontinuous weathering rind is dark gray in color. This is in contrast to the whitish-gray interior material. ALHA80110 is probably a fragment from ALHA80101. Dimensions: 7 x 5.5 x 3 cm.

 

Petrographic Description: Brian Mason

Microscopic and microprobe examination has confirmed that ALHA80110, 80112, and 80115 are fragments of a single meteorite, along with ALHA80101, 80103, 80105, and ALHA80113, 80114, 80116, and 80125 are so similar that they can be included with a reasonable degree of certainty. In all of them chondrules are sparse and poorly defined, tending to merge with the granular ground-mass, which consists largely of olivine and pyroxene, with minor amounts of plagioclase, troilite and nickel-iron. A moderate amount of limonitic staining is present around the nickel-iron grains. Microprobe analyses gave the following mineral compositions: olivine, Fa24; orthopyroxene, Fs20; plagioclase, An10-11; grains of merrillite were analyzed in ALHA80110, 80115, 80125. These specimens are all L6 chondrites.  The sections of ALHA80115, 80116, and 80125 have thin (0.1-0.2 mm) veinlets consisting largely of brown isotropic material (possibly ringwoodite and majorite); plagioclase near these veinlets is partly converted to maskelynite, with CaO content (2.0-2.2%) appropriate to oligoclase composition, but with deficient and variable Na2O content.

Data from:
  MB76
  Table 2
  Line 500:
Origin or pseudonym:Main icefield
Mass (g):167.6
Class:L6
Weathering grade:B
Fayalite (mol%):24
Ferrosilite (mol%):20
Comments:26Al=65±4; 80101 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 4(2) (1981), 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° 46' 24"S, 159° 16' 54"E)
Note: the NHM and MetBase coordinates are 11.7 km apart

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