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Mundrabilla 021
Basic information Name: Mundrabilla 021
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2010
Country: Australia
Mass:help 13 g
Meteoritical Bulletin:  MB 100  (2012)  H4
Recommended:  H4    [explanation]

This is 1 of 6033 approved meteorites (plus 11 unapproved names) classified as H4.   [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
Writeup from MB 100:

Mundrabilla 021        30°46’47"S, 127°31’23"E

Western Australia, Australia

Found: 26 Oct 2010

Classification: Ordinary chondrite (H4)

History: Single piece found by L. Chlanda in the Mundrabilla strewn field while filming an episode of the Meteorite Men.

Physical characteristics: One broken surface, ~70% smooth surface after fusion crust.

Petrography: (A. Tomkins, Monash) Moderately defined chondrules to 2 mm, sit in a poorly defined (due to weathering) matrix. Chondrule types include RP, POP, PP, BO and PO. Most olivine grains have sharp extinction, but some show undulose extinction or mosaicism. Plagioclase has been partially converted to maskelynite. The sample is moderately porous, with significant porosity filled by weathering products. Fe-Ni metal grains look to have been abundant, but have been largely removed (98%) by rusting. Abundant troilite has also been heavily weathered. Extensive sulfide/metal melt networks and micro-breccias have been replaced by iron oxides during weathering.

Geochemistry: (A. Tomkins, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa18.4-18.4, mean=18.61 mol%, std=0.16, n=5; Low-Ca pyroxene Fs16.5-17.5, mean=17.12 mol%, std=0.46, n=4.

Classification: Ordinary chondrite (H4, S4, W4)

Data from:
  Table 1
  Line 1151:
State/Prov/County:Western Australia
Origin or pseudonym:Nullarbor Plain
Date:26 Oct 2010
Mass (g):13
Shock stage:S4
Weathering grade:W4
Fayalite (mol%):18.61
Ferrosilite (mol%):17.12
Wollastonite (mol%):1.34
Classifier:A. Tomkins
Type spec mass (g):6.4
Type spec location:Monash
Main mass:Monash
Finder:L. Chlanda
Comments:Submitted by A. Tomkins
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     Recommended::   (30° 46' 47"S, 127° 31' 23"E)

     This is 1 of 346 approved meteorites from Western Australia, Australia (plus 1 unapproved name) (plus 11 impact craters)
     This is 1 of 715 approved meteorites from Australia (plus 45 unapproved names) (plus 27 impact craters)
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