header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Jun 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 85010
Basic information Name: Allan Hills 85010
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 85010
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 3.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 10(1)  (1987)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CM2
Recommended:  CM2    [explanation]

This is 1 of 505 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeuphelp
Writeup from AMN 10(1):

Sample No.: ALH85010, 85011, 85012

Location: Allan Hills

Field Nos.: 2294; 2653; 2221

Weight (g): 3.2; 10.7; 3.9

Dimensions (cm): 2x1x0.5; 2.5x2.5x3; many small pieces

Meteorite Type: C2 Chondrite

 

Macroscopic Description: René Martinez

Thick fusion crust is present on some of these carbonaceous chondrite fragments and not on others. All specimens have small (<1 mm) white rounded and irregular inclusions set in a fine-grained black matrix. Each fragment of ALH85012 has small amounts of evaporite deposit present. Visible oxidation is minor.

 

Thin Section (ALH85005,4) Description: Brian Mason

The section consists largely of black opaque matrix, through which are scattered small mineral grains (up to 0.2 mm) and sparse chondrules and chondrule fragments. The chondrules and most of the mineral grains consist of olivine, usually close to Mg2SiO4 in composition but with some more iron-rich. Pyroxene is less common, and is close to MgSiO3 in composition. A few grains of calcite were noted. The meteorite is a C2 chondrite; ALH85010, 85011, and 85012 as well as ALH85007, 85008, 85009, and 85013 are very similar to ALH85005 and the possibility of pairing should be considered.

Data from:
  MB76
  Table 2
  Line 1239:
Origin or pseudonym:Far Western
Mass (g):3.2
Class:C2
Weathering grade:A/B
Fayalite (mol%):0.7-28
Ferrosilite (mol%):3-20
Comments:85005 pairing group
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 10(1) (1987), 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° 50' 11"S, 156° 8' 33"E)
Note: the NHM and MetBase coordinates are 91 km apart

Statistics:
     This is 1 of 38937 approved meteorites from Antarctica (plus 5051 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page