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Outer Recovery Icefields 18021
Basic information Name: Outer Recovery Icefields 18021
     This is an OFFICIAL meteorite name.
Abbreviation: OUT 18021
Observed fall: No
Year found: 2019
Country: Antarctica [Collected by the Lost Meteorites of Antarctica project, UK]
Mass:help 2.46 kg
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  L6
Recommended:  L6    [explanation]

This is 1 of 12727 approved meteorites (plus 11 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 6 May 2021
Writeuphelp
Writeup from MB 110:

Outer Recovery Icefields 18021 (OUT 18021)        81°33.39883’S, 17°32.23717’W

Antarctica, Antarctica

Find: 2019 Jan 12

Classification: Ordinary chondrite (L6)

History: The meteorite was recovered as part of the Lost Meteorites of Antarctica project, which was funded in the UK by the Leverhulme Trust and supported by the British Antarctic Survey and the University of Manchester. These samples were collected as part of the project’s first field season in austral summer December 2018 - January 2019 by a two person field party consisting of Katherine Joy and Julie Baum. Found on snow at Outer Recovery Icefields ice field 4 (south icefield). Altitude 1516 m.

Physical characteristics: Mass: 2460 g. Pieces: 1. Dimensions: 19 cm × 12 cm × 10 cm. A round, whole stone with 75% black fusion crust and light-gray interior.

Petrography: Equilibrated texture with poorly defined chondrules (up to 1 mm in diameter). Metal and sulfide distributed throughout.

Geochemistry: Mineral compositions and geochemistry: All analyses by EPMA. Olivine Fa25.3±0.5 (N=11), Pyroxene Fs21.2±0.5Wo1.5±0.3 (N=10).

Classification: Ordinary chondrite (L6).

Specimens: 2460 g type specimen (main mass) held at the NHM London.

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Antarctica
Origin or pseudonym:Outer Recovery Icefields
Date:2019 Jan 12
Latitude:81°33.39883'S
Longitude:17°32.23717'W
Mass (g):2460
Pieces:1
Class:L6
Weathering grade:A
Fayalite (mol%):25.3±0.5 (N=11)
Ferrosilite (mol%):21.2±0.5 (N=10)
Wollastonite (mol%):1.5±0.3 (N=10)
Magnetic suscept.:4.71
Classifier:J. L. MacArthur, K. H. Joy and R. H. Jones, UMan
Type spec mass (g):2460
Type spec location:NHM London
Main mass:NHM London
Finder:Julie Baum
Comments:Field ID:000021 BAS ID: Z18.4.2; submitted by J. L. MacArthur, UMan
Institutions
   and collections
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 2011)
UMan: Department of Earth Sciences, University of Manchester, Oxford Road, Manchester, M139PL, United Kingdom (institutional address; updated 30 Jan 2024)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos:
CreditPhotos
Public domain photographs:
Jane MacArthur      
Geography:

Antarctica
Coordinates:
     Recommended::   (81° 33' 24"S, 17° 32' 14"W)

Statistics:
     This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names)
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