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Northwest Africa 13371
Basic information Name: Northwest Africa 13371
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13371
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 24.8 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 541 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 2 Aug 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13371 (NWA 13371)

Chwichiya, Morocco

Purchased: 2018

Classification: Carbonaceous chondrite (CM2)

History: Sergey Vasiliev purchased 5 individuals under the name Oued Haouza (CM2) at the Munich mineral show in 2018.

Physical characteristics: Samples are rounded to irregularly shaped and are partially coated in black, flow-lined and bubbled fusion crust. The interior of the samples is black with small, light-gray chondrules.

Petrography: Description and Classification (A. Love, App) Sample has a brecciated chondritic texture composed of lithologies that show varying levels of alteration. The sample is composed of (vol %): chondrules (12) with average apparent diameter of 161 µm (n=146); CAI’s (8); chondrule fragments and mineral grains (3) set within a fine-grained, FeO-rich, opaque matrix (77). Dust mantles are present on a portion of chondrules. Phyllosilicates are present within chondrule mesostasis and mixed with tochilinite in portions of the matrix. FeNi metal occurs as rounded inclusions within silicates only. Additional minerals are: troilite, chromite and magnetite.

Geochemistry: (A. Love, App) Olivine, Fa25.4±17.2 (Fa0.3-48.9), Cr2O3 in ferroan olivines 0.4±0.1, n=17; low-Ca pyroxene, Fs5.8±9.5Wo1.2±0.7 (Fs0.8-36.1Wo0.7-3.0, n=12).

Classification: Carbonaceous chondrite (CM2) Textures, mineralogy and matrix abundance suggest this is a CM2. Presence of altered mesostasis and tochilinite-phyllosilicate intergrowths suggests CM2.

Specimens: Sergey Vasiliev holds the main masses. 2 whole stones totaling 5g and a polished thin section are on deposit at App.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Chwichiya
Place of purchase:Munich Mineral Show
Date:P 2018
Mass (g):24.8
Pieces:5
Class:CM2
Shock stage:C-S2
Weathering grade:low
Fayalite (mol%):25.4±17.2
Ferrosilite (mol%):5.8±9.5
Wollastonite (mol%):1.2±0.7
Magnetic suscept.:4.77
Classifier:A. Love, App
Type spec mass (g):5
Type spec location:App
Main mass:Sergey Vasiliev
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is the only approved meteorite from Chwichiya, Morocco
     This is 1 of 1498 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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