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O'Malley 015
Basic information Name: O'Malley 015
     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 63.9 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  L5
Recommended:  L5    [explanation]

This is 1 of 7217 approved meteorites (plus 4 unapproved names) classified as L5.   [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 015        30°32’18.3"S, 131°15’18.9"E

South Australia, Australia

Found: 10 Apr 2011

Classification: Ordinary chondrite (L5)

History: Single piece found by A. Tomkins on the Nullarbor plain.

Physical characteristics: Single rounded greenish sample with rust spots that appears very fresh, but lacking fusion crust.

Petrography: (A. Tait, Monash) Matrix is clear and recrystallized. Chondrules edges poorly defined. Plagioclase is readily discernible. Olivine and pyroxene are subhedral and up to 400 μm. Chondrule population includes; GOP, C, BO, POP and RP. Shock lamellae are present in many of the large olivine crystals, and undulose extinction is common. Metal grains to 1 mm. Melt pockets exist around the edges of most metal grains. Some metal grains have been slightly oxidized, but most are intact.

Geochemistry: (A. Tait, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa23.4-24.4, mean=24.04 mol%, std=0.43, n=4; Low-Ca pyroxene Fs20.6-21.5, mean=21.01 mol%, std=0.39, n=4.

Classification: Ordinary Chondrite (L5, S3, W1).

Data from:
  MB100
  Table 1
  Line 1724:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:10 Apr 2011
Latitude:30°32'18.3"S
Longitude:131°15'18.9"E
Mass (g):63.9
Pieces:1
Class:L5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):24.04
Ferrosilite (mol%):20.01
Wollastonite (mol%):1.02
Classifier:A.W. Tait
Type spec mass (g):56.1
Type spec location:Monash
Main mass:Monash
Finder:A.Tomkins
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)
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Geography:

Australia
Coordinates:
     Recommended::   (30° 32' 18"S, 131° 15' 19"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)
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