Meteoritical Bulletin: Entry for Northwest Africa 12737

header

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 29 May 2023
Search for:	Search type:	Search limits:	Display:	Publication:
Names Text Places Classes Years	Contains Starts with Exact Sounds like	NonAntarctic Falls Non-NWAs Has strewnfield		What's new in the last:
Include past classifications in search		Has photo	Limit to approved meteorite names
Search text:

Northwest Africa 12737

Basic information

Name: Northwest Africa 12737
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12737
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 966 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	CK5
Recommended:			CK5 [explanation]

This is 1 of 205 approved meteorites classified as CK5. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 27 Jul 2019

Writeup

help

Writeup from MB 108:

Northwest Africa 12737 (NWA 12737)

(Northwest Africa)

Purchased: 2019 Mar

Classification: Carbonaceous chondrite (CK5)

History: Purchased in Temara, Morocco, by Adam Aaronson in March 2019.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fresh specimen composed of some separated, well-formed chondrules in a recrystallized matrix containing Cr-magnetite (with rare inclusions of chlorapatite and ilmenite), intermediate plagioclase, pentlandite and troilite.

Geochemistry: Olivine (Fa_29.6±0.4(range Fa_29.0-29.9), N = 4), low-Ca pyroxene (Fs_25.8±0.2Wo_0.9±0.3(range Fs_25.6-25.9Wo_1.1-0.7), N = 2), pigeonite (Fs_22.0Wo_13.0), augite (Fs_11.3Wo_41.6), plagioclase (An_63.8Or_0.7). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ¹⁷O -3.772, -4.218, -4.061; δ¹⁸O 0.935, 0.273, 0.431; Δ¹⁷O -4.266, -4.362, -4.289 per mil.

Classification: Carbonaceous chondrite (CK5).

Specimens: 21.6 g including one polished thin section at UWB; remainder with Aaronson.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Temara
Date:	P 2019 Mar
Mass (g):	966
Pieces:	7
Class:	CK5
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	29.6±0.4
Ferrosilite (mol%):	25.8±0.2
Wollastonite (mol%):	0.9±0.3
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	21.6
Type spec location:	UWB
Main mass:	Aaronson
Comments:	Work name M2190; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

Find references in NASA ADS:
Find references in Google Scholar:

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

Direct link to this page