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Northwest Africa 15721
Basic information Name: Northwest Africa 15721
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15721
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 530 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  CVred3
Recommended:  CVred3    [explanation]

This is 1 of 32 approved meteorites classified as CVred3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 23 Feb 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15721 (NWA 15721)

(Northwest Africa)

Purchased: Dec 2022

Classification: Carbonaceous chondrite (CVred3)

History: The meteorite was purchased from a meteorite dealer in Tan-Tan, Morocco.

Physical characteristics: Dark brownish rock with some fusion crust.

Petrography: The meteorite shows a grayish to light brownish interior and is composed of large up to 2 mm sized chondrules, up to 1 cm sized whitish CAIs, and olivine amoeboids all set into a fine-grained matrix. Opaque phases are metal, chromite, and essentially Ni-free sulfides. Few chondrules show reddish staining due to terrestrial alteration.

Geochemistry: Ni in sulfides <0.06 wt%, N=7

Classification: Carbonaceous chondrite (CVred3). Reduced subgroup based on low concentrations of Ni in sulfides (Gattacceca et al., 2020)

Bibliography:
  • Gattacceca J.,Bonal L.,Sonzognia C., and Longereya J. (2020) CV chondrites: More than one parent body. Earth Planet. Sci. Letts. 547, 116467. (link)
Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Tan-Tan, Morocco
Date:P Dec 2022
Mass (g):530
Pieces:1
Class:CVred3
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):10.5±13.5 (0.3-38.1, n=21)
Ferrosilite (mol%):1.2±0.4 (0.8-2.3, n=12)
Wollastonite (mol%):1.0±0.2 (0.8-1.5, n=12)
Classifier:A. Greshake, MNB
Type spec mass (g):22.4
Type spec location:MNB
Main mass:Said Yousfi
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9559 approved meteorites from (Northwest Africa) (plus 1872 unapproved names)

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