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Northwest Africa 15772
Basic information Name: Northwest Africa 15772
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15772
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1425 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 605 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 4 Mar 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15772 (NWA 15772)

(Northwest Africa)

Purchased: 2018

Classification: Carbonaceous chondrite (CV3)

History: Purchased April 3, 2018 from a meteorite dealer in Rissani, Morocco.

Physical characteristics: Single stone with a reddish fusion crust. Saw cut surface shows numerous well formed, large chondrules set in an orange-brown matrix. Scattered CAIs are visible. The matrix makes up approximately 50-60% of this meteorite.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows primarily porphryritic chondrules, most of which are magnesian type I, ferroan chondrule olivines are rare. Aluminous ferro-magnesian phyllosilicates were detected in the matrix. Fe-sulfides are ubiquitous in the matrix, some chondrules had Fe-Ni metal blebs.

Geochemistry: (C. Agee, UNM) olivine Fa3.6±3.4, Fe/Mn=73±67, n=12; low-Ca pyroxene Fs1.1±0.3Wo1.0±0.2, Fe/Mn=11±6, n=6. Oxygen isotopes (K. Ziegler, UNM): 3 acid-washed fragments analyzed by laser fluorination gave δ18O= -0.084, 1.664; δ17O= -4.451, -2.609; Δ17O= -4.407, -3.488 (linearized, all per mil, TFL slope=0.528).

Classification: Carbonaceous chondrite (CV3)

Specimens: 26 g including a probe mount on deposit at UNM, Adam Aaronson holds the main mass.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):1425
Pieces:1
Class:CV3
Shock stage:low
Weathering grade:low
Fayalite (mol%):3.6±3.4
Ferrosilite (mol%):1.1±0.3
Wollastonite (mol%):1.0±0.2
Classifier:C. Agee, UNM
Type spec mass (g):26
Type spec location:UNM
Main mass:Adam Aaronson
Comments:Field name M2113; submitted by C. Agee
Plots: O isotopes:  
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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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