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Arpu Kuilpu
Basic information Name: Arpu Kuilpu
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2019
Country: Australia
Mass:help 31 g
Recommended:  H5    [explanation]

This is 1 of 10264 approved meteorites (plus 18 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 8 Apr 2021
Writeup from MB 110:

Arpu Kuilpu        -30.623689, 129.631274

South Australia, Australia

Confirmed fall: 2019 June 2

Classification: Ordinary chondrite (H5)

History: A fireball was observed by the Desert Fireball Network (DFN) at 7:27 AM local time on the morning of 2 June 2019. The event lasted 5 s, before the meteoroid stopped ablating at an altitude of 28.8 km, eventually landing near Hughes, South Australia. The Maralinga people are the traditional custodians of this land and call the area in which the stone was found "Arpu Kuilpu", which means "Little rocks". The meteorite was recovered the following month on 17 July 2019, by a searching team from the DFN.

Physical characteristics: Single stone with a mass of 31 g, roughly in the shape of a sphere with a radius of ~1-1.5 cm. There is little to no evidence of terrestrial alteration on the surface or interior of the meteorite.

Petrography: The petrography is based on investigations of a polished thick section, with a backscattered electron image (BSE). The texture is typical of ordinary chondrites, containing some chondrules and single silicate mineral clasts (olivine, pyroxene, plagioclase), as well as metal and sulfide grains, all randomly distributed throughout the sample. Phosphate and chromite are present as well, though in minor abundances.

Geochemistry: Olivine compositions range from Fa18.9 to Fa19.3 (Fa19.2±0.2 n=20). Orthopyroxene ranges from Fs16.3 Wo0.9 to Fs17.1 Wo1.7 (Fs16.8±0.2Wo1.4±0.2 n=19). Chromite compositions range from Cr/Cr+Al = 0.850 to 0.859 (n=10) and Fe/Fe+Mg = 0.826 to 0.864.

Classification: The above compositions are consistent with H-type ordinary chondrites. Both the texture and the Wo compositions of the OPX indicate a petrologic type 5.

Specimens: The main mass, fragments and a polished thick section are all held at SAM.

Data from:
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Arpu Kuilpu
Date:2019 June 2
Mass (g):31
Weathering grade:W0
Fayalite (mol%):19.2±0.2 (n=20)
Ferrosilite (mol%):16.8±0.2 (n=19)
Wollastonite (mol%):1.4±0.2
Classifier:S. Anderson, G. Benedix, L. Forman, and P. Shober, CUWA
Type spec mass (g):31
Type spec location:SAM
Main mass:SAM
Finder:Desert Fireball Network Team
Comments:Pronounced 'Are-puh Koo-ill-puh'; submitted by Seamus Anderson
   and collections
SAM: Department of Mineralogy, South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia; Website (institutional address; updated 18 Oct 2011)
CUWA: Curtin University, Perth 6845, Western Australia, Australia (institutional address)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     Recommended::   (30° 37' 25"S, 129° 37' 53"E)

     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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