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Northwest Africa 13299
Basic information Name: Northwest Africa 13299
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13299
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 299 g
Classification
  history:
Recommended:  EH3    [explanation]

This is 1 of 138 approved meteorites classified as EH3.   [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites
Comments: Approved 2 Aug 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13299 (NWA 13299)

Algeria

Purchased: 2020

Classification: Enstatite chondrite (EH3)

History: Fabien Kuntz purchased the 298.8 g sample from a nomad in Tindouf, Algeria, in 2020.

Physical characteristics: Sample has a brown weathered exterior, is irregular in shape, and has a distinctive odor of sulfur during cutting, grinding and polishing operations. The interior of the sample is metal-rich. Abundant small light-gray chondrules are visible on the cut face.

Petrography: Description and classification (A. Love, App): Sample shows a chondritic texture composed of ovoid chondrules and fragments with an average apparent diameter 299 µm (n=66) set within a fine-grained clastic matrix composed of opaques and silicates. Sample contains poikilitic chondrules with olivine chadacrysts and porphyritic chondrules contain clear isotropic mesostasis. Additional minerals are: daubréelite, niningerite, schreibersite, djerfisherite, rudashevskyite, troilite ( 2wt% Cr), perryite, Si polymorph, albitic plagioclase. Si-bearing kamacite has an average of 2.41 wt% Si.

Geochemistry: (A. Love, App) Low-Ca pyroxene, Fs4.1±4.3Wo0.6±0.5 (Fs0.6-16.9Wo0.2-2.4, n=18); olivine, Fa0.6±0.2, Cr2O3=0.3±0.1 (Fa0.4-0.9, n=7).

Classification: Enstatite chondrite (EH3, C-S3, W2). Textures, mineralogy, mineral chemistry, cathodoluminescence, chondrule diameters and magnetic susceptibility indicate this sample is an unequilibrated EH chondrite.

Specimens: Fabien Kuntz holds the main mass. A 31.27 g slice and polished thin section are on deposit at App.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2020
Mass (g):298.8
Pieces:1
Class:EH3
Shock stage:C-S3
Weathering grade:W2
Fayalite (mol%):0.6±0.2
Ferrosilite (mol%):4.1±4.3
Wollastonite (mol%):0.6±0.5
Magnetic suscept.:5.60
Classifier:A. Love, App
Type spec mass (g):31.27
Type spec location:App
Main mass:Fabien Kuntz
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)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1015 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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