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Northwest Africa 14728
Basic information Name: Northwest Africa 14728
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14728
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 116 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  H4
Recommended:  H4    [explanation]

This is 1 of 6564 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14728 (NWA 14728)

(Northwest Africa)

Purchased: 2021 Nov

Classification: Ordinary chondrite (H4)

History: B. Kormos purchased the stone from a Moroccan dealer in November 2021.

Physical characteristics: (D. Rezes, CSFK) Originally an individual angular (length: 8 cm, width: 4 cm) dark brown stone (116 g) without fusion crust. Several well-defined chondrules are observable on the broken surface of the stone. Cut surface reveals numerous pores and thin cracks.

Petrography: (D. Rezes, CSFK) The stone has chondritic texture with well-defined chondrules. The chondrules are relatively small with an average diameter of 487 µm (N=46). The chondrules contain devitrified glass. The texture is slightly porous with pore diameters up to 250 µm. FeNi metal and troilite show heavy oxidation without the alteration of mafic silicates. Olivine crystals show relatively sharp optical extinction, however they contain irregular fractures. Planar fractures are rare. Chromite, troilite, and apatite were identified as accessory minerals.

Geochemistry: (D. Rezes, CSFK) Olivine Fa19.28±0.24 (range Fa18.75-19.72; PMD Fa=1.27%), Fe/Mn=40.7±5.5, N=24; low-Ca pyroxene (enstatite) Fs17.71±1.30Wo1.00±1.08 (range Fs15.63-19.36Wo0.19-3.29; PMD Fs=7.37%), Fe/Mn=25.2±3.2, N=8; augite crystallites Fs11.53±1.17Wo33.23±5.83, Fe/Mn=18.2±3.6, N=2.

Classification: Ordinary chondrite (H4), shock stage S2, weathering grade W3.

Specimens: 25 g on deposit at CSFK, B. Kormos holds the main mass and one polished thin section.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021 Nov
Mass (g):116
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):19.28±0.24 (N=24)
Ferrosilite (mol%):17.71±1.30 (N=8)
Wollastonite (mol%):1.00±1.08 (N=8)
Classifier:D. Rezes, CSFK
Type spec mass (g):25
Type spec location:CSFK
Main mass:B. Kormos
Comments:Work name: KBNWAx2; submitted by Daniel Rezes
Institutions
   and collections		 CSFK: Research Center for Astronomy and Earth Sciences, H-1121 Budapest, Konkoly Thege Miklós út 15-17.l Hungary, Hungary (institutional address; updated 7 Apr 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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Photos:
CreditPhotos
Public domain photographs:
Daniel Rezes         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9927 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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