header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 11 Oct 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Allan Hills A77025
Basic information Name: Allan Hills A77025
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA77025
This meteorite may also be called Allan Hills 77025 (ALH 77025) in publications.

Observed fall: No
Year found: 1977
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 19.4 g
Classification
  history:
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 9646 approved meteorites (plus 16 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)
Writeuphelp
Writeup from AMN 4(1):

Sample No.: ALHA77025

Location: Allan Hills

Field No.: 77122727

Weight (gms): 19.40

Meteorite Type: H5 Chondrite

 

Physical Description:

Specimen is tabular and rounded. The entire surface is covered with a brownish-black fusion crust. A few small fissures in the crust reveal a medium gray interior. Specimen is moderately weathered and chipped easily. The freshly chipped surface revealed some flecks of fresh metal, however, it is mostly iron oxide stained. Approximate length is 3.0 cm.

 

Petrographic Description: Brian Mason

This meteorite is similar in texture, mineral composition, and degree of weathering to ALHA77021, which suggests that these two stones may be separate pieces of the same meteorite.

Data from:
  MB76
  Table 2
  Line 31:
Origin or pseudonym:Main icefield
Mass (g):19.4
Class:H5
Weathering grade:C
Fayalite (mol%):18
Ferrosilite (mol%):17
Comments:26Al=54±5; 77021 pairing group
Catalogs:
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:
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)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page