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 A77014
Basic information Name: Allan Hills A77014
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA77014
This meteorite may also be called Allan Hills 77014 (ALH 77014) in publications.

Observed fall: No
Year found: 1977
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 309 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 2(1)  (1979)  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 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.: ALHA77014

Location: Allan Hills

Field No.: 77122931

Weight (gms): 308.8

Meteorite Type: H5 Chondrite

 

Physical Description:

No fusion crust is preserved on this tabular stone (9.0x6.0x2.5 cm). The exterior of the specimen is shiny, reddish-brown with lighter brownish-gold streaks randomly distributed over the surface. One fracture appears to penetrate the sample completely and numerous, smaller cracks are present, many of which are parallel, cover the exterior surfaces. This sample appears exfoliated. When the thin section sample was taken, no fresh metal was exposed on the stone.

 

Petrographic Description: Brian Mason

Chondritic structure is prominent in the thin section, but the margins of some chondrules are indistinct and tend to merge with the granular matrix. Some barred olivine and porphyritic olivine chondrules have gray turbid interstitial material, probably devitrified glass. Minor minerals include nickel-iron and troilite. A moderate amount of brown limonitic staining pervades the section, and small patches of limonite surround some of the metal grains. Plagioclase is present as small untwinned grains difficult to recognize. Microprobe analyses give the composition of the olivine as Fa18, the orthopyroxene as Fs17, and the plagioclase as An12.

Data from:
  MB76
  Table 2
  Line 22:
Origin or pseudonym:Main icefield
Mass (g):308.8
Class:H5
Weathering grade:C
Fayalite (mol%):18
Ferrosilite (mol%):17
Comments:26Al=55±3; 77014 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 2(1) (1979), 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