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Mundrabilla 022
Basic information Name: Mundrabilla 022
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2013
Country: Australia
Mass:help 66.5 g
Recommended:  H5    [explanation]

This is 1 of 10308 approved meteorites (plus 45 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Nov 2020
Writeup from MB 109:

Mundrabilla 022        30°46’17.99"S, 127°44’32.16"E

Western Australia, Australia

Find: 2013

Classification: Ordinary chondrite (H5)

History: A completely crusted stone weighing 66.53 g was found on open plain by G. Kelahar (Alex Bevan, WAM).

Physical characteristics: Physical Characteristics: Elongated, completely crusted stone weighing 66.53 g measuring 5.5 × 3.5 × 2.5 cm (A. Bevan, WAM)

Petrography: (L. Daly, L. V. Forman, Curtin). Specimen has readily defined chondrules within a heavily stained dark red matrix. The chondrules include types RP, PO, POP, C and BO, and chondrule mesostases are devitrified. Sizes range from 0.46-2.1 mm with a mean of 1.1 mm (n=13). Mineralogy consists of olivine, pyroxene, chromite, feldspar, as well as some metal and sulphide and Ca-rich phosphate. Olivine and pyroxene have undulose extinction and planar fractures. Some grains exhibit a weak mosaicism. Feldspars are <50 µm. The metal and sulfide present in the sample have been approximately 20-30% replaced with iron oxide. The sample also contains shock veins with some melt pockets.

Geochemistry: Mineral Compositions and Geochemistry: (L. Daly, L. V Forman, Curtin) EDS, Olivine: Fa20.2±2.1 (n=12) with some rare fayalitic grains Fa79.6. Low Ca pyroxene: Fs17.8±0.9Wo1.3±0.3 (n=8) there are also rare augite Fs16.1Wo20.8. Feldspar Ab85.1±2.1.

Classification: Ordinary Chondrite H5, S4, W2

Specimens: The WAM holds the main mass now 64.32 g and one thin section.

Data from:
  Table 0
  Line 0:
State/Prov/County:Western Australia
Mass (g):66.53
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):20.2
Ferrosilite (mol%):17.8
Wollastonite (mol%):1.3
Classifier:A. W. R. Bevan (WAM), L. Daly & L. V. Forman (Curtin University)
Type spec mass (g):64.32
Type spec location:WAM
Main mass:WAM
Finder:G. Kelahar
Comments:Submitted by L. V. Forman (Curtin University, WAM)
   and collections
WAM: Department of Earth & Planetary Sciences, Western Australian Museum. Locked Bag 49, Welshpool DC, Western Australia 6986, Australia; Website (institutional address; updated 18 Oct 2011)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     Recommended::   (30° 46' 18"S, 127° 44' 32"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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