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Northwest Africa 14988
Basic information Name: Northwest Africa 14988
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14988
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 384 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Winonaite
Recommended:  Winonaite    [explanation]

This is 1 of 88 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 20 Dec 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14988 (NWA 14988)

(Northwest Africa)

Purchased: 2019

Classification: Primitive achondrite (Winonaite)

History: Purchased by Ziyao Wang in April 2019 from Saeed Haddany in Erfoud, Morocco.

Physical characteristics: Single stone. Orange-brown weathered exterior. Saw cut reveals a fine-grained texture of silicates and oxidized iron patches.

Petrography: (A. Ross and C. Agee, UNM) Microprobe and reflected light microscope examination of a polished mount shows a texturally equilibrated mosaic of enstatite and diopside with grain size in the range 100-300 μm, many triple junctions are present. Nearly all of the primary metal has been oxidized. No feldspar was observed in the microprobe mount.

Geochemistry: (A. Ross, UNM) Olivine Fa2.4±0.5, Fe/M=10±2, n=6; enstatite Fs3.1±0.0Wo1.1±0.1, Fe/Mn=8±0, n=3; diopside Fs1.2±0.0Wo47.3±0.3, Fe/Mn=6±1, n=3; plagioclase Ab81.7±1.4An14.8±2.0, n=4. Oxygen isotopes (K. Ziegler, UNM): 3 acid-washed fragments analyzed by laser fluorination gave δ18O= 4.959; 5.390; 4.856; δ17O= 2.044, 2.291, 2.021; Δ17O= -0.574, -0.555, -0.543 (linearized, all per mil, TFL slope=0.528).

Classification: Primitive achondrite (Winonaite) based on oxygen isotopes which plot in the winonaite field; also based on the very magnesian olivines and pyroxenes with low Fe/Mn values.

Specimens: 21.4 g including a probe mount on deposit at UNM, WangZ holds the main mass.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):383.7
Pieces:1
Class:Winonaite
Shock stage:low
Weathering grade:high
Fayalite (mol%):2.4±0.5
Ferrosilite (mol%):3.1±0.0, 1.2±0.0
Wollastonite (mol%):1.1±0.1, 47.3±0.3
Classifier:C. Agee, UNM
Type spec mass (g):21.4
Type spec location:UNM
Main mass:WangZ
Comments:WZY-03; submitted by C. Agee
Plots: O isotopes:  
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)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
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. ?
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9825 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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