Meteoritical Bulletin: Entry for Northwest Africa 15284

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Northwest Africa 15284

Basic information

Name: Northwest Africa 15284
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15284
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 364 g

Classification
history:

Recommended:

H4 [explanation]

This is 1 of 6407 approved meteorites (plus 2 unapproved names) classified as H4. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 14 Sep 2022

Writeup

Writeup from MB 111:

Northwest Africa 15284 (NWA 15284)

(Northwest Africa)

Purchased: 2021

Classification: Ordinary chondrite (H4)

History: Found in 2021 by Yunes Chaoui, later purchased by Chris Monk on 8-1-2021.

Physical characteristics: One stone with dark-brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is an ordinary chondrite containing chondrules (Av. 500±50 _m) and accessory Fe-Ni metal and troilite.

Geochemistry: Olivine (Fa_18.9±0.4, range Fa_18.2-19.8, n=34), Low-Ca Pyroxene (Fs_16.7±0.5Wo_1.2±0.5, range Fs_16.1-18.4Wo_0.8-3.0, n=21).

Classification: Ordinary Chondrite (H4).

Specimens: 23.3 g at Cascadia, main mass with Chris Monk.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2021
Mass (g):	364
Pieces:	1
Class:	H4
Shock stage:	S3
Weathering grade:	W3
Fayalite (mol%):	18.9±0.4
Ferrosilite (mol%):	16.7±0.5
Wollastonite (mol%):	1.2±0.5
Classifier:	D. Sheikh, Cascadia
Type spec mass (g):	23.3
Type spec location:	Cascadia
Main mass:	Chris Monk
Comments:	CML 1577; submitted by Daniel Sheikh

Institutions
and collections

Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)

Catalogs:

References:

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

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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