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Northwest Africa 16296
Basic information Name: Northwest Africa 16296
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16296
Observed fall: No
Year found: 2023
Country: Morocco
Mass:help 640 g
Classification
  history:
Recommended:  L3.4    [explanation]

This is 1 of 52 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 13 Nov 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 16296 (NWA 16296)

Morocco

Purchased: 2023

Classification: Ordinary chondrite (L3.4)

History: The meteorite was found near Tantan, Morocco, and was purchased from the finder by Mustapha Oulkouch, who subsequently sold it to Mendy Ouzillou on Feb. 12, 2023.

Physical characteristics: Five identically appearing pieces found together. Partially covered with black weathered fusion crust. Saw-cut surfaces show many densely packed chondrules set in an orange-brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous porphyritic chondrules, most with mesostasis or glass. Ubiquitous opaque matrix is found thoughout. Apparent mean chondrule diameter is 503±372 μm, n=43. (A. Love, App) Cathodoluminescence was observed using the CL Olympus BX-51 with a Reliotron CL control and stage housed within the Department of Geology at Appalachian State University. Sample exhibits bright and distinct CL. Chondrules commonly contain mesostasis that displays blue CL and rare yellow CL (OC subtype 3.2-3.4). Forsteritic olivine chondrules commonly display red CL and those that display dull red CL are present (3.0-3.4). Some enstatite displays magenta CL. Matrix shows weak CL grading to fine-grained blue (>/=3.4).

Geochemistry: (M. Spilde and C. Agee UNM) Chondrule olivine Fa17.6±7.8, Fe/Mn=49±19, Cr2O3=0.13±0.09 (wt%), n=20; low-Ca pyroxene Fs10.9±6.3Wo0.5±0.2, n=6.

Classification: Ordinary chondrite L3.4. L based on mean chondrule size. Type 3.4 is estimated by cathodluminescence observations and the scheme described in Huss et al. (2006).

Specimens: 26.6 g on deposit at UNM, Mendy Ouzillou holds the main mass.

Bibliography:
  • Huss, G.R., Rubin, A.E. and Grossman, J.N. (2006) Thermal Metamorphism in Chondrites. in Meteorites and the Early Solar System II, D.S. Lauretta and H.Y. McSween Jr. (eds.), University of Arizona Press, Tucson, 943 pp., 567-586. (link)
Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2023
Mass (g):640
Pieces:5
Class:L3.4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.6±7.8
Ferrosilite (mol%):10.9±6.3
Wollastonite (mol%):0.5±0.2
Classifier:C. Agee, UNM; A. Love, App
Type spec mass (g):26.6
Type spec location:UNM
Main mass:Mendy Ouzillou
Comments:Fieldname MMO-0223; submitted by C. Agee
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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. 112, in preparation (2023)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)

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