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Northwest Africa 14270
Basic information Name: Northwest Africa 14270
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14270
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 20 g
Classification
  history:
Recommended:  Achondrite-ung    [explanation]

This is 1 of 119 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 11 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14270 (NWA 14270)

(Northwest Africa)

Purchased: 2020

Classification: Ungrouped achondrite

History: Purchased by Ziyao Wang in 2020 from a delaer in Erfoud, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Igneous assemblage (devoid of chondrules) consisting of compositionally zoned olivine and pyroxene with interstitial glassy mesostasis. Zoned olivine is mantled by orthopyroxene which is in turn mantled by pigeonite and subcalcic augite. Plagioclase is absent. Accessory phases are troilite, kamacite and taenite.

Geochemistry: Olivine (cores Fa16.7-19.7; rims Fa20.4-23.0; FeO/MnO = 45-51, N = 6), low-Ca pyroxene cores (Fs22.9-23.0Wo3.8-4.4, FeO/MnO = 30-31, N = 2), pigeonite mantles (Fs21.5Wo5.9; Fs21.5Wo19.6; FeO/MnO = 25-30, N = 2), subcalcic augite rims (Fs28.2-33.7Wo30.8-33.2, FeO/ MnO = 29-32, N = 2). Oxygen isotopes (K. Ziegler, UNM): analysis of acid-washed subsamples by laser fluorination gave, respectively, δ17O 3.762, 3.772, 3.831; δ18O 5.160, 5.188, 5.260; Δ17O 1.038, 1.033, 1.053 per mil (all data linearized).

Classification: Achondrite (igneous, ungrouped, with oxygen isotopic affinities to L chondrites). Paired with NWA 13272 and NWA 13351.

Specimens: 4.1 g in the form of a polished endcut at UWB; remaind with WangZ.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2020
Mass (g):20.02
Pieces:1
Class:Achondrite-ung
Shock stage:low
Weathering grade:low
Fayalite (mol%):16.7-23.0
Ferrosilite (mol%):22.9-23.0; 23.8; 21.5
Wollastonite (mol%):3.8-4.4; 5.9; 19.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):4.1
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-27; submitted by A. Irving
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)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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