![]() |
||
|
Allan Hills A77296 | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Allan Hills A77296 This is an OFFICIAL meteorite name. Abbreviation: ALHA77296 This meteorite may also be called Allan Hills 77296 (ALH 77296) in publications. Observed fall: No Year found: 1977 or 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass: ![]() | ||||||||||||||||||||
Classification history: |
This is 1 of 12222 approved meteorites (plus 7 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) | ||||||||||||||||||||
Writeup![]() |
Writeup from AMN 2(1):
This text was reprinted from AMN 2(1) in AMN 4(1). In some cases, it may be an updated version from the original. Sample No.: ALHA77296 Location: Allan Hills Field No.: 78010211B Weight (gms): 963.3 Meteorite Type: L6 Chondrite
Physical Description: Remnants of fusion crust are present on the N surface of this angular specimen. The crust is a dull, orangish-brown, covers approximately 15% of the sample and is 1 mm thick. The B surface appears to have had the fusion crust removed; it is smoother than the remaining surfaces, which are fracture surfaces. The matrix is light gray and has iron oxidation associated with the included metallic particles. Both chondrules and lithic clasts, darker and lighter than the matrix material, are present. On the W surface, there is a subrounded, gray clast that is more than 1 cm in length. The specimen is 13.0 x 9.5 x 5.0 cm. In the field photographs of this sample, another specimen (ALHA77292) is also present, thus, perhaps, indicating that they are a paired fall.
Petrographic Description: The section shows sparse and ill-defined chondrules set in a granular matrix of olivine and orthopyroxene, with minor amounts of nickel-iron, troilite, and untwinned plagioclase. A small amount of limonitic staining is associated with the metal grains. Microprobe analyses show olivine (Fa24), orthopyroxene (Fs21), and plagioclase (An11) of uniform composition. The meteorite is classified as an L6 chondrite. | ||||||||||||||||||||
Data from: MB76 Table 2 Line 246: |
|
||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||
References: | Published in Antarctic Meteorite Newsletter 2(1) (1979), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
| ||||||||||||||||||||
Geography:![]() |
Statistics: This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
Proximity search: |