Meteoritical Bulletin: Entry for Northwest Africa 14180

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Northwest Africa 14180

Basic information

Name: Northwest Africa 14180
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14180
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 1660 g

Classification
history:

Recommended:

LL6 [explanation]

This is 1 of 2852 approved meteorites (plus 2 unapproved names) classified as LL6. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 6 Oct 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 14180 (NWA 14180)

(Northwest Africa)

Purchased: 2021 Jun

Classification: Ordinary chondrite (LL6)

History: Purchased by Ziyao Wang in June 2021 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Highly recrystallized with triple grain junction and poikiloblastic textures (mean grainsize ~70 µm). Three possible but indistinct remnant chondrules were observed in a large area thin section. Composed predominantly of olivine and low-Ca pyroxene with accessory augite, sodic plagioclase, low-Ti chromite, troilite, pentlandite and taenite.

Geochemistry: Olivine (Fa_31.7±1.1, range Fa_31.1-33.3, N = 4), low-Ca pyroxene (Fs_25.5±0.2Wo_2.0±0.2, range Fs_25.2-25.7Wo_1.9-2.2, N = 4), augite (Fs_10.6±0.2Wo_43.6±0.2, range Fs_10.3-10.8Wo_43.4-43.8, N = 4), plagioclase (Ab_83.2An_10.7Or_6.1). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ¹⁷O 3.899, 4.036, 3.953; δ¹⁸O 5.064, 5.402, 5.205; Δ¹⁷O 1.226, 1.183, 1.205 (all data linearized).

Classification: Ordinary chondrite (LL6).

Specimens: 28.9 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Ouarzazate
Date:	P 2021 Jun
Mass (g):	1660
Pieces:	many
Class:	LL6
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	31.7±1.1
Ferrosilite (mol%):	25.5±0.2
Wollastonite (mol%):	2.0±0.2
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	28.9
Type spec location:	UWB
Main mass:	WangZ
Comments:	Work names WZY-49 and AB 89; 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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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