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Northwest Africa 15498
Basic information Name: Northwest Africa 15498
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15498
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 400 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  CV3
Recommended:  CV3    [explanation]

This is 1 of 470 approved meteorites (plus 2 unapproved names) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 20 Dec 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15498 (NWA 15498)

(Northwest Africa)

Purchased: 2022

Classification: Carbonaceous chondrite (CV3)

History: A single 400 g stone was found by a nomad in a place of unknown coordinates. The meteorite was purchased by Carlos Muñecas Muñoz (Expometeoritos) from a dealer in Tindouf, Algeria, in June of 2022.

Physical characteristics: The sample has brownish green sand blasted exterior and has chondrules that protrude and the cut face shows dispersed chondrules, CAIs and submetallic grains in a dark green fine-grained matrix.

Petrography: Description and classification (A. Love, App) Sample shows chondritic texture composed of well-defined, rimmed chondrules (Avg. diameter 1114 µm, n=13 and abundant CAIs set within (`35 vol%) opaque matrix with FeO rich olivine (Fa49.0±2.4). Additional minerals are: troilite, spinel, magnetite and pentlandite.

Geochemistry: (A. Love, App) Olivine (Fa12.2±13.8 (0.3-42.1), Cr2O3 in ferroan olivine 0.1±0.3, Fe/Mn=55.3±58.7, n=15); low Ca-pyroxene (F1.9±1.2Wo1.4±0.7 (Fs0.9-3.6Wo0.8-2.4), Fe/Mn=10.0±5.5 n=4); pigeonite (Fs9.5Wo5.2, Fe/Mn=26.8, n=1). Magnetite has very low Cr2O3 content (0.19±0.16 wt% Cr2O3, n=5).

Classification: Carbonaceous chondrite (CV3 C-S2 wi-1) CV3 based on unequilibrated mineral compositions, presence of CAIs and abundance of matrix.

Specimens: Carlos Muñecas Muñoz (Expometeoritos) holds the main mass of this meteorite. A polished thin section and an endcut weighing 26.2 1g are on deposit at App.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2022
Mass (g):400
Pieces:1
Class:CV3
Shock stage:C-S2
Weathering grade:wi-1
Fayalite (mol%):12.2±13.8
Ferrosilite (mol%):1.9±1.2
Wollastonite (mol%):1.4±0.7
Magnetic suscept.:3.27
Classifier:A. Love, App
Type spec mass (g):26.21
Type spec location:App
Main mass:Carlos Muñecas Muñoz (Expometeoritos)
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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos:
CreditPhotos
Public domain photographs:
Anthony Love      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
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