Meteoritical Bulletin: Entry for Northwest Africa 11904

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Northwest Africa 11904

Basic information

Name: Northwest Africa 11904
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11904
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 4 kg

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	CV3
Recommended:			CV3 [explanation]

This is 1 of 565 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 31 Aug 2018

Writeup

help

Writeup from MB 107:

Northwest Africa 11904 (NWA 11904)

(Northwest Africa)

Purchased: 2018

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Abdelhadi Aithiba in Morocco in 2018.

Physical characteristics: Single stone, dark, weathered, irregular exterior, distinct chondrules up to ~3 mm and scattered CAIs are visible on the surface; the matrix is dark gray in color.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount many irregular shaped porphryritic chondrules, some AOAs observed, fine-grained matrix makes up about ~50% of this meteorite.

Geochemistry: (C. Agee, UNM) Olivine Fa_2.8±2.7, range Fa_0.5-11.9, Cr₂O₃=0.25±0.14 (wt%), CaO=0.27±0.13 (wt%), n=22; low-Ca pyroxene Fs_4.5±7.7Wo_1.2±0.5, n=6. Oxygen isotopes (K. Ziegler, UNM): 3 analyses, with δ¹⁷O = -2.359, -2.108, -0.349 and δ¹⁸O = 2.317, 2.000, 4.233 (linearized values).

Classification: Carbonaceous chondrite (CV3)

Specimens: 20.66 g including a probe mount on deposit at UNM, Abdelhadi Aithiba holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2018
Mass (g):	4000
Pieces:	1
Class:	CV3
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	2.8±2.7
Ferrosilite (mol%):	4.5±7.7
Wollastonite (mol%):	1.2±0.5
Classifier:	C. Agee, UNM
Type spec mass (g):	20.66
Type spec location:	UNM
Main mass:	Abdelhadi Aithiba
Comments:	Field name AB-73; submitted by C. Agee, UNM

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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

Find references in NASA ADS:
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Photos:

Credit	Photos
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 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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