header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 24 Jul 2021
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:  
O'Malley 013
Basic information Name: O'Malley 013
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2011
Country: Australia
Mass:help 7.3 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  L4
Recommended:  L4    [explanation]

This is 1 of 1719 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Feb 2012
Writeuphelp
Writeup from MB 100:

O’Malley 013        30°53’08.2"S, 131°22’55.1"E

South Australia, Australia

Found: 9 Apr 2011

Classification: Ordinary chondrite (L4)

History: Single piece found by A. Tait on the Nullarbor Plain.

Physical characteristics: Small dark-brown stone lacking fusion crust.

Petrography: (E. Mare, Monash) Stone contains abundant well-defined chondrules (to 2 mm) in a recrystallized matrix. Chondrule types include BO, RP, CC, PO, PP and POP. Large Fe-Ni metal grains (~100 μm) are present in one corner of the meteorite, elsewhere the metal grains are small (10-50 μm). Troilite (3-5%) is more abundant than metal (1%). Troilite forms rims around some chondrules, and is in some places oxidized in thin parallel lines. Oxides have partly replaced metal and troilite and make up 4-5% of the meteorite. Olivine grains have undulose extinction and shock lamellae.

Geochemistry: (E. Mare, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa22.5-23.3, mean=22.94 mol%, std=0.27, n=7; Low-Ca pyroxene Fs19.3-20.1, mean=19.76 mol%, std=0.30, n=9.

Classification: Ordinary chondrite (L4, S3, W2)

Data from:
  MB100
  Table 1
  Line 1722:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:9 Apr 2011
Latitude:30°53'08.2"S
Longitude:131°22'55.1"E
Mass (g):7.3
Pieces:1
Class:L4
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):22.94
Ferrosilite (mol%):19.76
Wollastonite (mol%):1.13
Classifier:E. R. Mare
Type spec mass (g):5
Type spec location:Monash
Main mass:Monash
Finder:A.Tait
Comments:Submitted by A. Tomkins, E. Mare, A. Tait, A. Langendam
Institutions
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Australia
Coordinates:
     Recommended::   (30° 53' 8"S, 131° 22' 55"E)

Statistics:
     This is 1 of 239 approved meteorites from South Australia, Australia (plus 2 unapproved names) (plus 4 impact craters)
     This is 1 of 715 approved meteorites from Australia (plus 45 unapproved names) (plus 27 impact craters)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page