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O'Malley 003
Basic information Name: O'Malley 003
     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 11.1 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  H6
Recommended:  H6    [explanation]

This is 1 of 5855 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Feb 2012
Writeuphelp
Writeup from MB 100:

O’Malley 003        30°59’10.4"S, 131°19’55.6"E

South Australia, Australia

Found: 6 Apr 2011

Classification: Ordinary chondrite (H6)

History: Three broken pieces found in a 25 m2 area by A. Langendam, E. Mare and A. Tomkins on the Nullarbor Plain.

Physical characteristics: Three flat broken highly weathered fragments, with no fusion crust.

Petrography: (E. Mare, Monash) Few recognizable chondrules (up to 1 mm) in a heavily recrystallized matrix. Plagioclase to >50 μm. Chondrule types include POP, RP, CC, BO, PP. Fe-Ni metal grains are unusually small and along with troilite have almost completely been replaced by oxides which make up 20% of this meteorite. Olivine grains have sharp extinction.

Geochemistry: (E. Mare, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa18.6-19.4, mean=19.01 mol%, std=0.34, n=4; Low-Ca pyroxene Fs16.6-17.7, mean=17.07 mol%, std=0.43, n=4.

Classification: Ordinary chondrite (H6, S1, W4)

Data from:
  MB100
  Table 1
  Line 1712:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:6 Apr 2011
Latitude:30°59'10.4"S
Longitude:131°19'55.6"E
Mass (g):11.1
Pieces:3
Class:H6
Shock stage:S1
Weathering grade:W4
Fayalite (mol%):19.01
Ferrosilite (mol%):17.07
Wollastonite (mol%):1.22
Classifier:E. R. Mare
Type spec mass (g):8.3
Type spec location:Monash
Main mass:Monash
Finder:E. Mare
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° 59' 10"S, 131° 19' 56"E)

Statistics:
     This is 1 of 233 approved meteorites from South Australia, Australia (plus 3 unapproved names) (plus 4 impact craters)
     This is 1 of 702 approved meteorites from Australia (plus 46 unapproved names) (plus 27 impact craters)
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