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Northwest Africa 14733
Basic information Name: Northwest Africa 14733
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14733
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 100 g
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 119 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14733 (NWA 14733)

(Northwest Africa)

Purchased: 2016 May 19

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased by Ziyao Wang from a Morocco dealer during the China (Hunan) Mineral & Gem Show in Chenzhou City in 2016, and subsequently acquired by Huapei Wang (CUG?in 2020.

Petrography: (Xiao-Wen Liu, Lang Zhang, and Ai-Cheng Zhang, NJU) The meteorite displays a cumulate texture of coarse-grained orthopyroxene (80 vol.%) and plagioclase (15 vol.%) crystals. Accessory minerals include augite, Ti-rich chromite, ilmenite, troilite, rutile, SiO2 polymorphs, zircon and phosphate. Orthopyroxene grains contain exsolution augite lamellae. Plagioclase partly converted to maskelynite. Chromite grains have a wide range in grain size from a few micrometers to 600 ?m. Both merrillite and apatite are present. Shock-induced melt veins are also observed.

Geochemistry: (Xiao-Wen Liu, Ai-Cheng Zhang, NJU) Orthopyroxene: Fs34.7±0.2Wo2.3±0.2 (n=18), Fe/Mn: 30±1.1, Ti/Al: 0.7±0.1; augite: Fs14.0±0.2Wo44.0±0.3 (n=25), Fe/Mn: 24±1.2, Ti/Al: 0.5±0.1; calcic plagioclase: An87.0±2.5Ab12.4±2.4Or0.5±0.1 (n=26) ; chromite: TiO2: 3.4±0.4 wt.% (n=11).

Classification: Eucrite (noritic, unbrecciated).The classification of this meteorite as a eucrite is based on the presence of ilmenite, zircon, and Ca-phosphate minerals, the high Ti/Al values of pyroxene, and the high TiO2 contents in chromite. Classification as a noritic type is based on the high abundances of orthopyroxene and plagioclase.

Specimens: 100 g at CUG; two polished thick sections at NJU

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:China
Date:P 2016 May 19
Mass (g):100
Pieces:1
Class:Eucrite-unbr
Classifier:Xiao-Wen Liu, Lang Zhang, and Ai-Cheng Zhang, NJU; Chen Wen, Huapei Wang, CUG
Type spec mass (g):100
Type spec location:CUG
Main mass:CUG
Finder:anonymous
Comments:Submitted by Chen Wen, CUG
Institutions
   and collections
CUG: Planetary Science Institute, School of Earth Sciences China University of Geosciences (Wuhan) 388 Lumo Road, Wuhan, Hubei 430074, P. R. China, China (institutional address; updated 4 Feb 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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