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Northwest Africa 14766
Basic information Name: Northwest Africa 14766
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14766
Observed fall: No
Year found: 2021
Country: Morocco
Mass:help 377 g
Classification
  history:
Recommended:  R3-4    [explanation]

This is 1 of 11 approved meteorites classified as R3-4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 8 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14766 (NWA 14766)

Morocco

Purchased: 2021 Apr 8

Classification: Rumuruti chondrite (R3-4)

Petrography: The rock is composed of an equilibrated clast area and an unequilibrated R chondritic area, and contains ~70 vol% matrix. The mean size of size of chondrules is 423±247 μm, varying from 110 to 1686 ?m (n=130). In the unequilibrated R chondrite area, clearly 0.3-2 mm sized and clearly defined chondrules set into the matrix and mineral fragments. Its mineralogy consist of olivine, pyroxene and Fe,Ni metal and rare sulfides (pyrrhotite and pentlandite). In the equilibrated clast area, the boundary of chondrules is not clear and Fe,Ni metal distribute in the clast randomly. Its mineralogy consist of olivine, pyroxene and Fe,Ni metal and rare oxide.

Geochemistry: Olivine Fa1.2-54.4, N=38; Low-Ca pyroxene Fs2.2-40.3Wo0-5.5, N=22; High-Ca pyroxene Fs7.9-29.0Wo10.3-48.6, N=5(EDS) clast: Olivine Fa41.6±0.9, range Fa40.4-43.8, N=15; High-Ca pyroxene Fs10.3-20.9Wo25.2-48.7, N=36; Low-Ca pyroxene Fs29.9-42.5Wo1.3-4.1, N=10 (EDS). FeO-rich olivine contains 0.11-0.21 wt% NiO.

Data from:
  MB111
  Table 0
  Line 0:
Date:P 2021 Apr 8
Mass (g):377 g
Pieces:1
Class:R3-4
Fayalite (mol%):27.9 ±15.4 (n=38)
Ferrosilite (mol%):17.2 ±9.0 (n=22)
Wollastonite (mol%):1.3 ±1.5 (n=22)
Classifier:Li shijie and Fan yan, IGCAS
Type spec mass (g):33 g
Type spec location:IGCAS
Main mass:Huang chuanjian
Comments:Submitted by Li shijie
Institutions
   and collections
IGCAS: Institute of Geochemistry Chinese Academy of Sciences, Guiyang, China (institutional address; updated 27 Mar 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1847 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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