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Northwest Africa 15522
Basic information Name: Northwest Africa 15522
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15522
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 11.8 kg
Classification
  history:
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 71 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 7 Jan 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15522 (NWA 15522)

(Northwest Africa)

Purchased: 2022

Classification: HED achondrite (Eucrite, melt breccia)

Petrography: (K. Metzler, IfP) Clast-rich melt rock, consisting of mm-sized basalt clasts and related debris (pyroxene and plagioclase fragments), embedded in a crystallized vesicular melt. The entire rock is thermally recrystallized, consisting of subgrains with sizes mostly <50 µm. Most subgrains in pyroxene are unequilibrated and chemically zoned. Accessories are ilmenite, chromium spinel, and a silica polymorph.

Geochemistry: Mineral compositions and geochemistry: Mean pyroxene composition: Fs46.4±4.0Wo12.2±2.3 (Fs41.3-53.0Wo8.4-16.7); mean Fe/Mn (at.): 29.6; n=11. Mean plagioclase composition: An88.8±3.8Or0.2±0.3 (An80.1-91.9Or0.0-0.7); n=11.

Classification: Eucrite (clast-rich melt rock)

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2022
Mass (g):11800
Pieces:1
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):46.4±4.0
Wollastonite (mol%):12.2±2.3
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Alali Sid Alarbi
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2023)
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Photos:
CreditPhotos
Public domain photographs:
Knut Metzler         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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