Skip to main content Smithsonian Institution

Catalog Data

Expedition:
Antarctic Search for Meteorites (ANSMET)  Search this
Weight:
7.5 g
Place:
Antarctica
Collection Date:
1977
Notes:
# NASA data for ALH 77297 Weathering: A Fracturing: B Pairing: ALH 77001 Fa: 24 mol % Fs: 20 mol % ²⁶Al: 70 ± 7 dpm/kg NTL: 2.5 ± 0.2 krad
The overall shape of the specimen is oblong (12.0 x 7.5 x 6.0 cm). Shiny, black, polygonally fractured fusion crust (~0.5 to 1 mm thick) is present on the B surface. On the B surface an area ~2 mm in diameter, possibly a partially melted chondrule, is shinier than the surrounding fusion crust. The N surface appears to be a recently fractured surface that is whitish gray with small, <1 mm, inclusions. Orangish brown oxidation staining is present on all surfaces. Cleaving the meteorite in half, revealed metallic flecks, <,5 mm in maximum diameter, that make up approximately 5% of the sample. Some haloing effects are apparent.
Record Last Modified:
21 Sep 2023
Specimen Count:
1
Other Numbers:
Original meteorite number : ALHA77297,16
USNM Number:
USNM 6531
See more items in:
Mineral Sciences
Meteorites
Inventory Collection
Data Source:
NMNH - Mineral Sciences Dept.
GUID:
http://n2t.net/ark:/65665/3588526c4-14e2-4bc5-88bb-bea6054669ec
EDAN-URL:
edanmdm:nmnhmineralsciences_1022900