Meteoritical Bulletin: Entry for Northwest Africa 14978

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Northwest Africa 14978

Basic information

Name: Northwest Africa 14978
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14978
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 48 g

Classification
history:

Recommended:

CV3 [explanation]

This is 1 of 612 approved meteorites (plus 1 unapproved name) classified as CV3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites

Comments:

Approved 25 May 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 14978 (NWA 14978)

(Northwest Africa)

Purchased: 2021 Aug

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Jason Whitcomb in August 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed chondrules (some with concentric rims, apparent diameter 980 ± 430 µm, N = 24) and amoeboid, very fine-grained CAI are set in a fine grained matrix (~40 vol.%, deep reddish-brown in thin section) containing Cr-bearing magnetite, troilite and rare kamacite. Mineral assemblages in two examined CAI are hedenbergite+anorthite+augite+olivine+magnetite and diopside+spinel+anorthite. Minor secondary calcite occurs in veinlets.

Geochemistry: Olivine (Fa_26.0±27.5, range Fa_5.1-77.9, N = 12), low-Ca pyroxene (Fs_1.2±0.6Wo_1.7±1.1, range Fs_0.8-1.6Wo_0.9-2.5, N = 3), pigeonite (Fs_1.9Wo_5.6), subcalcic augite (Fs_1.4Wo_34.2), magnetite (Cr₂O₃ 0.3-1.3 wt.%, N = 5).

Classification: Carbonaceous chondrite (CV3).

Specimens: 9.7 g including one polished thin section at PSF; remainder with Mr. J. Whitcomb.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021 Aug
Mass (g):	48
Pieces:	14
Class:	CV3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	26.0±27.5
Ferrosilite (mol%):	1.2±0.6
Wollastonite (mol%):	1.7±1.1
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	9.7
Type spec location:	PSF
Main mass:	J. Whitcomb
Comments:	Work name JW-83; submitted by A. Irving

Institutions
and collections

PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2022)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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