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Outer Recovery Icefields 18004
Basic information Name: Outer Recovery Icefields 18004
     This is an OFFICIAL meteorite name.
Abbreviation: OUT 18004
Observed fall: No
Year found: 2019
Country: Antarctica [Collected by the Lost Meteorites of Antarctica project, UK]
Mass:help 24.3 g
Classification
  history:
Recommended:  L5    [explanation]

This is 1 of 7227 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 31 May 2021
Writeuphelp
Writeup from MB 110:

Outer Recovery Icefields 18004 (OUT 18004)        81°24.62800’S, 18°08.78550’W

Antarctica, Antarctica

Find: 2019 Jan 6

Classification: Ordinary chondrite (L5)

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 firn at Outer Recovery Icefields ice field 1 (north icefield). Altitude 1354 m.

Physical characteristics: Mass: 24.34 g. Pieces: 1. Dimensions: 3.5 cm × 2 cm × 2 cm. An elongate, whole stone with 85% black fusion crust.

Petrography: Abundant well-defined chondrules (up to 1 mm). Metal and sulfide grains up to 0.7 mm occur in matrix and rimming some chondrules.

Geochemistry: Mineral compositions and geochemistry: All analyses by EPMA. Olivine Fa26.1±0.3 (N=12), Pyroxene Fs22.0±0.6Wo1.5±0.4 (N=10).

Classification: Ordinary chondrite (L5)

Specimens: 23.37 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 6
Latitude:81°24.62800'S
Longitude:18°08.78550'W
Mass (g):24.34
Pieces:1
Class:L5
Weathering grade:B/C
Fayalite (mol%):26.1±0.3 (N=12)
Ferrosilite (mol%):22.0±0.6 (N=10)
Wollastonite (mol%):1.5±0.4 (N=10)
Magnetic suscept.:4.83
Classifier:J. L. MacArthur, K. H. Joy and R. H. Jones, UMan
Type spec mass (g):23.37
Type spec location:NHM
Main mass:NHM
Finder:Katherine Joy
Comments:Field ID:000004 BAS ID: Z18.1.4; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
Jan McArthur      
Geography:

Antarctica
Coordinates:
     Recommended::   (81° 24' 38"S, 18° 8' 47"W)

Statistics:
     This is 1 of 40773 approved meteorites from Antarctica (plus 4570 unapproved names)
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