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Northwest Africa 15074
Basic information Name: Northwest Africa 15074
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15074
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1011 g
Classification
  history:
Recommended:  Diogenite-melt breccia    [explanation]

This is 1 of 6 approved meteorites classified as Diogenite-melt breccia.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 23 Jul 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15074 (NWA 15074)

(Northwest Africa)

Purchased: 2022

Classification: HED achondrite (Diogenite, melt breccia)

History: The meteorite was purchased from a meteorite dealer in Algeria.

Physical characteristics: Grayish fragment with minor fusion crust.

Petrography: Diogenite-melt breccia composed of up to 2 mm sized mineral fragments set into abundant shock melted matrix. Predominant minerals are low Ca-pyroxene partly with blebby and lamellar augite exsolutions and calcic plagioclase. The shock melt shows pronounced flow strcutures and is mostly recrystallized to acicular pyroxene and plagioclase grains. Mineral fragments in contact with the melt are partly resorbed. Minor phases include chromite and FeS. No metallic iron detected. Contains cracks filled with secondary calcite.

Geochemistry: low-Ca pyroxene: Fs33.3±0.2Wo2.2±0.2 (Fs33.1-33.6Wo1.9-2.5, FeO/MnO=26-29, n=7); augite exsolutions: Fs13.5±0.6Wo44.2±0.6 (Fs12.7-14.5Wo43.3-44.8, FeO/MnO=21-24, n=7); calcic plagioclase: An93.0±0.6 (An91.6-93.4, n=7)

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2022
Mass (g):1011
Pieces:1
Class:Diogenite-melt breccia
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):33.3; 13.5
Wollastonite (mol%):2.2; 44.2
Classifier:A. Greshake, MNB
Type spec mass (g):25.3
Type spec location:MNB
Main mass:Chnaoui Larbi and Zaid Essibit
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. 111, in preparation (2022)
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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