Meteoritical Bulletin: Entry for Northwest Africa 15620

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 24 Apr 2024
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 15620

Basic information

Name: Northwest Africa 15620
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15620
Observed fall: No
Year found: 2021
Country: Morocco
Mass: 9.97 kg

Classification
history:

Meteoritical Bulletin:	MB 112	(2023)	L6
Recommended:			L6 [explanation]

This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 7 Jan 2023

Writeup

Writeup from MB 112:

Northwest Africa 15620 (NWA 15620)

Morocco

Purchased: 2021 Dec

Classification: Ordinary chondrite (L6)

History: Purchased December 2021 by John Humphries from Mark Lyon in Arizona.

Physical characteristics: A dark brown weathered stone with caliche, saw cut reveals a mottled shock darkened interior with occasional lighter areas. Ubiquitous metal flecks are visible throughout the sample.

Petrography: (D. Dickens, CCMS) Optical and microprobe examination of polished probe mount shows a mostly recrystallized matrix of olivine and pyroxene with relict chondrules. Accessory phases include kamacite, troilite, and plagioclase. Plagioclase grain size is approximately 70 µm.

Geochemistry: (D. Dickens, CCMS and A. S. Bell, CUB) Olivine Fa_25.7±1.3, n=8; low-Ca pyroxene Fs_20.8±0.2Wo_1.6±0.2, n=8.

Classification: Ordinary chondrite (L6)

Specimens: 26 g including the probe mount on deposit at Cascadia

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Arizona
Date:	P 2021 Dec
Mass (g):	9969
Pieces:	1
Class:	L6
Shock stage:	S2
Weathering grade:	W4
Fayalite (mol%):	25.7±1.3
Ferrosilite (mol%):	20.8±0.2
Wollastonite (mol%):	1.6±0.2
Classifier:	D. Dickens, CCMS
Type spec mass (g):	26
Type spec location:	Cascadia
Main mass:	John Humphries
Comments:	Field name JH05; submitted by D. Dickens

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)
CUB: Daniel Ozdín, Mineralogical Museum of Comenius University, Faculty of Natural Sciences, Ilkovicova 6, 842 15 Bratislava, Slovakia (institutional address; updated 2 Dec 2018)
CCMS: Colorado Center for Meteoritic Studies 6200 Becker LN Loveland, CO 80538, United States (private address; updated 22 Jan 2024)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 112, in preparation (2023)

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

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Ryan Upchurch

Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

Direct link to this page