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Northwest Africa 13615
Basic information Name: Northwest Africa 13615
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13615
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 140 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  H5
Recommended:  H5    [explanation]

This is 1 of 11505 approved meteorites (plus 23 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Apr 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13615 (NWA 13615)

(Northwest Africa)

Purchased: 2019 Jun

Classification: Ordinary chondrite (H5)

History: A single stone weighing 140 g was found by an anonymous finder in Western Sahara and purchased in June 2019 at the Erfoud Market by Giovanni Pratesi for the Earth Sciences Dept of Unifi.

Physical characteristics: The main mass is partially covered by brown, stained fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, N. Calcabrini, UniFi): The thin section displays an equilibrated chondritic texture, with various chondrule types (PP, PO and BO) set in a fine grained matrix. Both olivine and orthopyroxene are homogeneous. Iron oxides, Fe-Ni alloys and troilite are the main opaque phases and can be found as individual grains scattared in the matrix or rimming chondrules

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, N. Calcabrini, UniFi); Olivine in both chondrules and matrix (Fa16.3±0.3Fo73.7±0.4; n=9); low-Ca pyroxene in both chondrules and matrix (Fs14.2±0.3En84.7±1.1Wo1.1±0.1; n=11);

Classification: Ordinary Chondrite (H5); S2; W2;

Specimens: The main mass, weighing 140 g, the type specimen, weighing 22 g , and one thin section are on deposit at MSN-FI (Inventory # I-3584).

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2019 Jun
Mass (g):140
Pieces:1
Class:H5
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):16.3±0.3 (N=9)
Ferrosilite (mol%):14.2±0.3 (N=11)
Wollastonite (mol%):1.1±0.0
Classifier:Vanni Moggi Cecchi
Type spec mass (g):22
Type spec location:MSN-FI
Main mass:MSN-FI
Finder:Anonymous
Comments:Prov.NWA13615;Field MOR8;Inv.I-3584; submitted by Vanni Moggi Cecchi
Institutions
   and collections
MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
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Revision
  history:
  This lists important revisions made to data for this record.

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