NWA 12464 - One of the only 7 Meteorites Classified LL3.15

Description

NWA 12464
NWA 12464
Found 2018
Chondrite
LL3.15
Specimen is a 1.86g slice
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NWA 12464 is one of the only 7 meteorites classified as LL3.15 (with 2 from Antartica - Yamato 791558 and Yamato 791324 - probably paired, 1 from India - Bishunpur - and 4 from Sahara - NWA 10598, 10650, 12462 and then 12464)...
Northwest Africa 12464
Basic information
Name:
Northwest Africa 12464
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 12464
Observed fall:
No
Year found:
2018
Country:
(Northwest Africa)
Mass:
597 g
Classification
history:
Recommended:
LL3.15
This is 1 of 7 approved meteorites classified as LL3.15.
[show all]
Comments:
Approved 22 Feb 2019
Writeup
Writeup from MB 108:
Northwest Africa 12464
(NWA 12464)
(Northwest Africa)
Purchased: 2018 March
Classification: Ordinary chondrite (LL3.15)
Petrography
: Chondrite with packed, well-delineated chondrules, with average apparent diameter 690±360 μm (n=40). Main opaques are metal, troilite, and their terrestrial weathering products. Chondrule mesostasis is devitrified. Zoned olivine.
Geochemistry
: Olivine Fa
12.8±9.1
, Fa PMD 56%, range Fa
0.4-32.6
(n=16). Cr
2
O
3
in ferroan olivine 0.20±0.18 wt% (n=12). Orthopyroxene Fs
8.2±7.4
Wo
1.6±1.1
(n=7). Magnetic susceptibility log χ (× 10
-9
m
3
/kg) = 3.95.
Classification
: LL3.15. LL group from magnetic susceptibility. Subtype from Cr
2
O
3
content of ferroan olivine.
Specimens
: Type specimen at
CEREGE
Data from:
MB108
Table 0
Line 0:
Place of purchase:
Zagora, Morocco
Date:
P 2018 March
Mass (g):
597
Pieces:
2
Class:
LL3.15
Weathering grade:
W3
Fayalite (mol%):
12.8±9.1 (n=16)
Ferrosilite (mol%):
8.2±7.4 (n=7)
Wollastonite (mol%):
1.6±1.1
Magnetic suscept.:
3.95
Classifier:
J. Gattacceca, L.K. Ruggiu, CEREGE
Type spec mass (g):
24.53
Type spec location:
CEREGE
Main mass:
Kuntz
Comments:
work name K388; submitted by J. Gattacceca
Institutions
and collections
CEREGE
: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Kuntz
: Fabien Kuntz, France;
Website
(private address)
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