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Outer Recovery Icefields 18014
Basic information Name: Outer Recovery Icefields 18014
     This is an OFFICIAL meteorite name.
Abbreviation: OUT 18014
Observed fall: No
Year found: 2019
Country: Antarctica [Collected by the Lost Meteorites of Antarctica project, UK]
Mass:help 761 g
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 211 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 5 Jun 2021
Writeuphelp
Writeup from MB 110:

Outer Recovery Icefields 18014 (OUT 18014)        81°29.68717’S, 17°59.02300’W

Antarctica, Antarctica

Find: 2019 Jan 11

Classification: Mesosiderite

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. Main mass (514.24 g) found on blue ice surface at Outer Recovery Icefields ice field 3 (west icefield). Altitude 1410 m. Second stone (233.46 g) found close by on blue ice surface ~5 meters away at 81°29.68450’S, 17°59.02033’W at similar altitude.

Physical characteristics: Total mass 760.83 g. Pieces: 2. Main mass 527.30 g, dimensions: 12 cm × 10 cm × 8 cm, an irregular, part stone with no fusion crust and dark-gray exterior. Orange rust visible. Second stone, 233.46 g, dimensions: 8 cm × 6 cm × 5 cm, an irregular part stone with no fusion crust and dark-gray exterior.

Petrography: Mineral and lithic clasts, and a network of metal grains up to 1 mm in size. Approximately 30% metal (including minor taenite), 30% pyroxene (including minor Ca-rich pyroxene), 22% plagioclase, 8% silica. Minor iron sulfide and merrillite.

Geochemistry: Mineral compositions and geochemistry: All analyses by EPMA. Low-Ca pyroxene Fs30.7±0.3Wo3.1±0.2 (N=6). Feldspar An93.1±2.4Ab6.8±2.4 (N=6).

Classification: Mesosiderite. Likely paired with OUT 18018.

Specimens: 514.24 g and 233.46 g stones (main mass) held at the NHM London as type specimen. Similarity (petrography, mineral chemistry) of these two stones with OUT 18018 suggests a likely pairing relationship.

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Antarctica
Origin or pseudonym:Outer Recovery Icefields
Date:2019 Jan 11
Latitude:81°29.68717'S
Longitude:17°59.02300'W
Mass (g):760.83
Pieces:2
Class:Mesosiderite
Weathering grade:B
Ferrosilite (mol%):30.7±0.3 (N=6)
Wollastonite (mol%):3.1±0.2 (N=6)
Magnetic suscept.:5.28
Classifier:J. L. MacArthur, K. H. Joy and R. H. Jones, UMan
Type spec mass (g):760
Type spec location:NHM
Main mass:NHM
Finder:Kathering Joy/Julie Baum
Comments:Main mass: Field ID:000014 BAS ID: Z18.3.10. Second stone: Field ID:000013 BAS ID: Z18.3.9.; 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° 29' 41"S, 17° 59' 1"W)

Statistics:
     This is 1 of 40756 approved meteorites from Antarctica (plus 4494 unapproved names)
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