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Northwest Africa 13775
Basic information Name: Northwest Africa 13775
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13775
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 30 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 307 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 28 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13775 (NWA 13775)

(Northwest Africa)

Purchased: 2021 Jan

Classification: Martian meteorite (Shergottite)

History: The meteorite was purchased by the main mass holder from a dealer in Temara, Morocco.

Physical characteristics: Many small, light-brownish fragments without fusion crust.

Petrography: The meteorite shows a porphyritic texure of up to 1.3 mm sized strongly zoned olivine phenocrysts set in a groundmass of zoned pigeonite and maskelynite. Olivine often contains magmatic inclusions with radial cracks extending into the host. Minor minerals are small homogeneous olivine, chromite, ilmenite, and pyrrhotite. Contains shock melt veins.

Geochemistry: olivine phenocrysts: Fa40.9±13.6 (Fa27.0-60.3, FeO/MnO=47±3, n=9); small olivine: Fa45.7±0.1, FeO/MnO=47±2, n=3; complex zoned pyroxene: Fs33.0±9.5Wo18.6±11.7 (Fs23.4-46.8Wo5.3-43.1, FeO/MnO=29±3, n=8); maskelynite: An51.3±2.6Ab46.8±2.3Or1.9±0.3 (An47.8-55.0Ab43.6-49.9Or1.3-2.3, n=8)

Classification: Martian; olivine-phyric shergottite

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Temara, Morocco
Date:P 2021 Jan
Mass (g):30
Pieces:many
Class:Martian (shergottite)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):40.9; 45.7
Ferrosilite (mol%):33.0
Wollastonite (mol%):18.6
Classifier:A. Greshake, MNB
Type spec mass (g):6.8
Type spec location:MNB
Main mass:Said Yousfi
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
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
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Said Yousfi   
Public domain photographs:
Ansgar Greshake   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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