Meteoritical Bulletin: Entry for Northwest Africa 14405

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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: 111 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	L3
Recommended:			L3 [explanation]

This is 1 of 848 approved meteorites (plus 2 unapproved names) 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

Writeup

help

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 Fa_15.3±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 Fs_15.2±9.9Wo_1.1±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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Algeria

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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