Meteoritical Bulletin: Entry for Northwest Africa 15920

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Northwest Africa 15920

Basic information

Name: Northwest Africa 15920
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15920
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass: 437 g

Classification
history:

Recommended:

LL3 [explanation]

This is 1 of 452 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 7 May 2023

Writeup

Writeup from MB 112:

Northwest Africa 15920 (NWA 15920)

(Northwest Africa)

Purchased: 2023 Jan 15

Classification: Ordinary chondrite (LL3)

Petrography: (K. Metzler, IfP) Ordinary chondrite of low petrologic type, consisting of closely packed chondrules (apparent size up to ~2 mm), chondrule fragments, and troilite, with small amounts of Fe-Ni metal grains and fine-grained interchondrule matrix. The mean apparent chondrule size is 578 µm (n=142).

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa_8.5±6.4(Fa_0.9-18.1; n=11); the mean low-Ca pyroxene composition is Fs_10.9±9.6Wo_1.1±1.2(Fs_1.7-30.8Wo_0.2-4.3; n=14).

Classification: LL chondrite, based on low metal content and mean apparent chondrule size. Petrologic subtype <3.5, based on the chemical variation of olivine (PMD of Fa values 75%).

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Nouakchott, Mauritania
Date:	P 2023 Jan 15
Mass (g):	437
Pieces:	1
Class:	LL3
Shock stage:	C-S4
Weathering grade:	W2
Fayalite (mol%):	8.5±6.4
Ferrosilite (mol%):	10.9±9.6
Wollastonite (mol%):	1.1±1.2
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP
Main mass:	Anonymous
Comments:	Submitted by K. Metzler, IfP

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

Catalogs:

References:

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

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Photos:

Credit	Photos
Public domain photographs:
Knut Metzler

Geography:

Coordinates:

Unknown.

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

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