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Northwest Africa 14405
Basic information Name: Northwest Africa 14405
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14405
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 111 g
Classification
  history:
Recommended:  L3    [explanation]

This is 1 of 750 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 13 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14405 (NWA 14405)

Algeria

Purchased: 2021

Classification: Ordinary chondrite (L3)

History: Purchased by Matthew Stream, reportedly found in Algeria in 2021.

Physical characteristics: Three matching stones, reddish brown weathered exterior, no fusion crust. Sawn surface reveals densely packed chondrules of variable size.

Petrography: (C. Agee, UNM) Reflected light microscopy and electron microprobe examination of a polished mount shows numerous unequilibrated chondrules, many are porphyritic, apparent mean diameter 535±248 μm n=29. Abundant opaque matrix, most chondrules with glass or mesostasis. Aluminous sub-calcic augite, Fe,Ni-metal, iron-oxide, and sulfide present.

Geochemistry: (C. Agee, UNM) Chondrule olivine Fa15.3±8.7, Fe/Mn=56±36, Cr2O3=0.15±0.08 wt%, range Cr2O3=0.05-0.27 wt%, CaO=0.10±0.06 wt%, n=20; low-Ca pyroxene Fs15.2±9.9Wo1.1±1.1, Fe/Mn=32±25, n=6.

Classification: Ordinary chondrite (L3). L based on apparent chondrule diameter, Metzler (2018). Estimated subtype 3.2.

Specimens: 20.45 g on deposit at UNM, Matthew Stream holds the main mass.

Bibliography:
  • Metzler K. (2018) From 2D to 3D chondrule size data: Some empirical ground truths. Meteorit. Planet. Sci. 53, 1489–1499 (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):111
Pieces:3
Class:L3
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):15.3±8.7
Ferrosilite (mol%):15.2±9.9
Wollastonite (mol%):1.1±1.1
Classifier:C. Agee, UNM
Type spec mass (g):20.45
Type spec location:UNM
Main mass:Matthew Stream
Comments:Field name MST-11; 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. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1156 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)

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