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Northwest Africa 15735
Basic information Name: Northwest Africa 15735
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15735
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1455 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 522 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 19 Mar 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15735 (NWA 15735)

(Northwest Africa)

Purchased: 2022

Classification: HED achondrite (Diogenite)

History: Shun-Chung Yang Mark Lyon (806, 201, 50 g) and (312 and 86 g) purchased samples from a dealer in fall of 2022.

Physical characteristics: Samples are single crystals or unbrecciated aggregates of cm-sized green crystals that appear identical to those of the Tatahouine meteorite. One sample shows orientation with a regmaglypted fusion-crusted surface and rollover lip covering approximately 60% of the stone.

Petrography: Description and classification (A. Love, App) Samples are composed of single crystals and unbrecciated aggregates showing weak undulatory extinction and fractures, some of which are filled with FeS. Additional minerals are: a silicai polymorph, troilite and chromite.

Geochemistry: (A. Love, App) low Ca-pyroxene (Fs24.2±0.2W2.8±0.0, Fe/Mn=28.4±0.9 n=18).

Classification: HED achondrite (diogenite) Based on texture and mineral composition, sample is a diogenite. Presence of a well-defined fusion crust, undulatory extinction (17 separate crystals) and Wo contents (Barrat et al., 1999) are characteristics that make this make this sample distinct from Tatahouine.

Specimens: Mark Lyon and Shun-Chung Yang (S-R meteorites) holds the main masses. 3 polished thin sections and 20 fragments weighing 25.23g are on deposit at App.

Bibliography:
  • Barrat J. A., Gillet Ph., Lesourd M., Blichert-Toft J. and Poupeau G. R. (1999) The Tatahouine diogenite: Mineralogical and chemical effects of sixty-three years of terrestrial residence. Meteoritics & Planetary Science 34, 91–97. (link)
Data from:
  MB112
  Table 0
  Line 0:
Date:P 2022
Mass (g):1455
Pieces:5
Class:Diogenite
Shock stage:U-S2
Weathering grade:W1
Ferrosilite (mol%):24.2±0.2
Wollastonite (mol%):2.8±0.0
Classifier:A. Love, APp
Type spec mass (g):25.23
Type spec location:App
Main mass:Mark Lyon and Shun-Chung Yang (S-R meteorites)
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. 112, in preparation (2023)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Chunliang Zhang            
Domjan Svilkovic   
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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