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Northwest Africa 13596
Basic information Name: Northwest Africa 13596
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13596
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 90 g
Classification
  history:
Recommended:  H3    [explanation]

This is 1 of 632 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 16 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13596 (NWA 13596)

(Northwest Africa)

Purchased: 2018 Oct

Classification: Ordinary chondrite (H3)

History: A single stone weighing 90 g was found by an anonymous finder in Western Sahara and purchased in October 2018 at the Turin Fair by Mario Di Martino.

Physical characteristics: The main mass is completely covered by a dark-brown fusion crust.

Petrography: (V.Moggi Cecchi, G.Pratesi, S.Caporali UniFi): The thin section displays a chondritic texture, with various chondrule types (PO, POP and RP) set in a fine grained matrix and ranging from 400 to 1200 μm. PO chondrules display zoned olivine crystals. POP chondrules display olivine grains and elongated pyroxene grains. Olivine is inhomogenesous and Mg-rich in chondrules, while Fe-rich in the matrix. Orthopyroxene in chondrules is inhomogeneous, with a core-rim variability. 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, S.Caporali UniFi); Olivine in both chondrules and matrix (Fa17.5±7.9Fo82.5±7.7; n=; Fe/Mn = 45.6±28.4); low-Ca pyroxene in both chondrules and matrix (Fs12.0±5.5En87.1±5.4Wo0.9±0.4; n=65; Fe/Mn = 17.5±11.3);

Classification: Ordinary Chondrite (H3); S3; W3, estimated subtype 3.5 based on Fa and Fs values and standard deviations.

Specimens: The main mass, weighing 90 g, is own by Mario Di Martino; the type specimen, weighing 18.1 g, and one thin section are on deposit at MSN-FI (Inventory # I-3569).

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Turin Mineral Show
Date:P 2018 Oct
Mass (g):90
Pieces:1
Class:H3
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):17.5±7.9 (N=92)
Ferrosilite (mol%):12.0±5.5 (N=49)
Wollastonite (mol%):0.9±0.4
Classifier:V. Moggi Cecchi, MSN-FI
Type spec mass (g):18.04
Type spec location:MSN-FI
Main mass:Di Martino
Finder:Anonymous
Comments:Field MDM18_18;Inv.I-3569; submitted by Vanni Moggi Cecchi
Institutions
   and collections
MSN-FI: MUSEO DI STORIA NATURALE DELL'UNIVERSITA' DEGLI STUDI DI FIRENZE Via Giorgio La Pira, 4 – 50121 FIRENZE, Italy; Website (institutional address; updated 14 Jan 2015)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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