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Northwest Africa 13635
Basic information Name: Northwest Africa 13635
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13635
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 2.91 kg
Classification
  history:
Recommended:  H6    [explanation]

This is 1 of 6177 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 9 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13635 (NWA 13635)

Algeria

Purchased: 2020

Classification: Ordinary chondrite (H6)

History: Reportedly found near Tablat, Algeria, in May 2020.

Physical characteristics: Eighteen identically appearing stones found together. All stones have fresh fusion crust. A broken surface reveals a fine-grained gray matrix with many scattered brown patches.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a few small scattered chondrules set in recrystallized matrix. Abundant fresh, unweathered metal grains observed.

Geochemistry: (C. Agee, UNM) Olivine Fa18.5±0.1, Fe/Mn=38±2, n=10; low-Ca pyroxene Fs16.3±0.0Wo1.5±0.1, Fe/Mn=22±1, n=5.

Classification: Ordinary chondrite (H6)

Specimens: 25.9 g on deposit at UNM, Matthew Stream holds 17 stones 2318 g, Martin Lollar holds a 595.6 g stone.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):2913.6
Pieces:18
Class:H6
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):18.5±0.1
Ferrosilite (mol%):16.3±0.0
Wollastonite (mol%):1.5±0.1
Classifier:C. Agee, UNM
Type spec mass (g):25.9
Type spec location:UNM
Main mass:Matthew Stream
Comments:Field name MAS-4; 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 1110 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)

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