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Northwest Africa 13628
Basic information Name: Northwest Africa 13628
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13628
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 67 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 513 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13628 (NWA 13628)

(Northwest Africa)

Purchased: 2020 Oct

Classification: HED achondrite (Eucrite)

History: The meteorite was found by Mr. Muhamad Salm and subsequently purchased by the main mass holder from a dealer in Adrar, Algeria.

Physical characteristics: Dark-grayish fragment without fusion crust.

Petrography: Predominantly composed of up 3 mm sized exsolved pyroxene and calcic plagioclase fragments cemented by abundant shock melt. Shock melt is partly recrystallized with lath-shaped plagioclase needles; embedded mineral fragment are partially resorbed. Minor phases are silica, chromite, and FeS; no metallic iron has been detected. The meteorite contains secondary barite and calcite-filled cracks.

Geochemistry: low-Ca pyroxene: Fs33.9±0.3Wo2.2±0.1 (Fs33.5-34.6Wo2.0-2.3, n=11, FeO/MnO=25-28); Ca-pyroxene: Fs12.6±0.8Wo44.9±0.9 (Fs10.8-13.8Wo44.0-47.0, n=13, FeO/MnO=18-21); calcic plagioclase: An92.9±0.9 (An91.7-93.9, n=5)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Adrar, Algeria
Date:P 2020 Oct
Mass (g):67
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:high
Ferrosilite (mol%):33.9; 12.6
Wollastonite (mol%):2.2; 44.9
Classifier:A. Greshake, MNB
Type spec mass (g):13.7
Type spec location:MNB
Main mass:Lucian Cojocaru
Finder:Muhamad Salm
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 Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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