MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Nov 2023
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Allan Hills A77074
Basic information Name: Allan Hills A77074
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA77074
This meteorite may also be called Allan Hills 77074 (ALH 77074) in publications.

Observed fall: No
Year found: 1977
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 12.1 g
Antarctic Meteorite Newsletter:  AMN 1(2)  (1978)  H5
Meteoritical Bulletin:  MB 76  (1994)  H5
NHM Catalogue:  5th Edition  (2000)  H5
NIPR Catalogue:  2000 Edition  (2000)  H5
MetBase:  v. 7.1  (2006)  H5
Recommended:  H5    [explanation]

This is 1 of 11372 approved meteorites (plus 22 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeup from AMN 4(1):

Sample No.: ALHA77074

Location: Allan Hills

Field No.: 77122721

Weight (gms): 12.07

Meteorite Type: H5 Chondrite


Physical Description:

The stone is moderately angular. Approximately 70% of the sample's exterior surface is covered by a brownish-black fusion crust. The remaining surfaces are fracture-surfaces that are yellowish-brown and severely weathered. An irregular cavity ~4 mm diameter is present on one fracture surface. Chipping for a thin section sample revealed fresh metal fragments on the interior. Approximate maximum dimension is 2.5 cm.


Petrographic Description: Brian Mason

This meteorite is similar in texture, mineral composition, and degree of weathering to Allan Hills 77061, 77062, 77064, and 77071, which suggests that these stones may be separate pieces of the same meteorite.

Data from:
  Table 2
  Line 64:
Origin or pseudonym:Main icefield
Mass (g):12.1
Weathering grade:B
Fayalite (mol%):18
Ferrosilite (mol%):17
Comments:77021 pairing group
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
Search for this meteorite in the NIPR database (Japan):   
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 4(1) (1981), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
Find references in NASA ADS:
Find references in Google Scholar:

     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 43'S, 159° 40'E)

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page