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Northwest Africa 14909
Basic information Name: Northwest Africa 14909
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14909
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 3.1 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 136 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 9 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14909 (NWA 14909)

Algeria

Purchased: 2021

Classification: HED achondrite (Eucrite, unbrecciated)

History: Reportedly found in Algeria. Purchased by Jay Piatek from Cheikh El Fakraoui a meteorite dealer in Morocco in 2021.

Physical characteristics: Four identical appearing pieces found together. Exterior shows a striking, relatively coarse, equigranular texture dominated by yellow to cream colored plagioclase and dark colored pyroxenes. Grain sizes are up to a few millimeters in diameter consistent with this sample being a gabbro. No brecciation present. Fusion crust is absent.

Petrography: (A. Ross, C. Agee, UNM) Electron microprobe analysis indicates a unbrecciated, equilibrated, gabbroic eucrite. Major phases are plagioclase and pyroxene in approximately equal modal abundance. Minor phases chromite, ilmenite, troilite, and silica were detected. Pyroxene shows coarse exsolution lamellae with distinct compositional separation of augite and low-Ca pyroxene.

Geochemistry: (A. Ross, UNM) Plagioclase An89.1±2.8Ab10.4±2.7, n=6; augite Fs28.8±0.3Wo42.5±1.1, Fe/Mn=32±1, n=5; low-Ca pyroxene Fs61.9±0.4Wo2.2±0.2, Fe/Mn=32±1, n=7.

Classification: Gabbroic eucrite

Specimens: 24.5 g on deposit at UNM, Jay Piatek holds two masses of 1485 g and 883 g.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):3100
Pieces:4
Class:Eucrite-unbr
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):61.9±0.4, 28.8±0.3
Wollastonite (mol%):2.2±0.2, 42.5±1.1
Classifier:C. Agee, UNM
Type spec mass (g):24.5
Type spec location:UNM
Main mass:Jay Piatek
Comments:Fieldname JP-4006; submitted by C. Agee
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. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:

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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