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Northwest Africa 15766
Basic information Name: Northwest Africa 15766
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15766
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 287 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  LL6-melt breccia
Recommended:  LL6-melt breccia    [explanation]

This is 1 of 23 approved meteorites classified as LL6-melt breccia.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 19 Mar 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15766 (NWA 15766)

(Northwest Africa)

Purchased: 2020

Classification: Ordinary chondrite (LL6, melt breccia)

Petrography: (K. Metzler, IfP) Ordinary chondrite melt breccia, consisting of mm- to cm-sized chondritic lithic clasts, embedded in a dark crystallized melt. The chondritic clasts are strongly recrystallized; secondary plagioclase grains mostly >50 µm.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition in clasts is Fa30.7±0.4 (Fa30.2-31.5; n=10). The mean low-Ca pyroxene composition in clasts is Fs24.5±0.4 Wo2.0±0.2 (Fs24.2-25.3 Wo1.7-2.4; n=8) with a mean CaO concentration of 1.0±0.1 (0.9-1.2) wt%.

Classification: LL chondrite based on mineral chemistry. Petrologic type based on the equilibrated state of olivine and pyroxene, and large grain size of secondary plagioclase.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2020
Mass (g):287
Pieces:1
Class:LL6-melt breccia
Shock stage:C-S3
Weathering grade:W2
Fayalite (mol%):30.7±0.4
Ferrosilite (mol%):24.5±0.4
Wollastonite (mol%):2.0±0.2
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Gregor Pacer, Bad Bellingen, Germany
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:
CreditPhotos
Public domain photographs:
Knut Metzler      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9746 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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