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Northwest Africa 13633
Basic information Name: Northwest Africa 13633
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13633
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 605 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 452 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 9 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13633 (NWA 13633)

Algeria

Purchased: 2020

Classification: Ordinary chondrite (LL3)

History: Purchased from Mostafa Hnini, reportedly found in Algeria in 2019.

Physical characteristics: One piece with no fusion crust. A sawn surface reveals many densely packed chondrules of variable size.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, apparent mean diameter 1000±600 μm (n=13), many with porphyritic, igneous-zoned olivines and pyroxenes, most with glass or mesostasis. Abundant fine-grained matrix throughout.

Geochemistry: (C. Agee, UNM) All chondrule olivine Fa18.7±9.4, range Fa0.6-33.7, Fe/Mn=47±16, Cr2O3=0.10±0.11 wt%, n=20; low-Ca pyroxene Fs13.7±6.6Wo1.0±1.4, Fe/Mn=31±18, n=10.

Classification: Ordinary chondrite (LL3), estimated subtype 3.4 based.

Specimens: 30 g on deposit at UNM, Simon de Boer holds the main mass.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):605.3
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):18.7±9.4
Ferrosilite (mol%):13.7±6.6
Wollastonite (mol%):1.0±1.4
Classifier:C. Agee, UNM
Type spec mass (g):30
Type spec location:UNM
Main mass:Simon de Boer
Comments:Field name SB1; submitted by C. Agee, UNM
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1277 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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