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Northwest Africa 15221
Basic information Name: Northwest Africa 15221
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15221
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 342 g
Classification
  history:
Recommended:  R3-5    [explanation]

This is 1 of 24 approved meteorites classified as R3-5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 14 Sep 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15221 (NWA 15221)

(Northwest Africa)

Purchased: 2021

Classification: Rumuruti chondrite (R3-5)

Petrography: (K. Metzler, IfP) Chondritic breccia, consisting of cm-sized lithic clasts, embedded in clastic host material. The investigated lithic clast represents type 5 material (equilibrated olivine and pyroxene) with clearly visible chondrules. The host material (clastic matrix) consists mainly of related debris, but also contains unequilibrated chondrule fragments. Accessories are troilite and pentlandite; no metal was found.

Geochemistry: Mineral compositions and geochemistry: Clasts of petrologic type 5: Mean olivine composition: Fa38.4±0.7 (Fa37.3-39.4); n=10; mean low-Ca pyroxene composition Fs29.7±0.8Wo1.8±1.2 (Fs Wo28.5-31.0); n=9; Selected chondrule fragments in the clastic matrix: Mean olivine composition: Fa16.7±6.2 (Fa2.4-21.8); n=11; mean low-Ca pyroxene composition Fs15.4±3.5 Wo0.3±0.3 (Fs12.4-23.8Wo0.0-0.9); n=6

Classification: R chondrite based on mineral chemistry in the type 5 clast. Genomict breccia (R3-5).

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021
Mass (g):342
Pieces:Many
Class:R3-5
Shock stage:C-S2
Weathering grade:high
Fayalite (mol%):38.4±0.7; 16.7±6.2
Ferrosilite (mol%):29.7±0.8; 15.4±3.5
Wollastonite (mol%):1.8±1.2; 0.3±0.3
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Gregor Pacer, Bad Bellingen, Germany
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 (2022)
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Photos:
CreditPhotos
Public domain photographs:
Knut Metzler      
Geography: 
Coordinates:Unknown.

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

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