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Northwest Africa 13597
Basic information Name: Northwest Africa 13597
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13597
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 411 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  H3
Recommended:  H3    [explanation]

This is 1 of 708 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 13597 (NWA 13597)

(Northwest Africa)

Purchased: 2018 Oct

Classification: Ordinary chondrite (H3)

History: A single stone weighing 411 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 partially covered by a brown, partially stained fusion crust.

Petrography: (V.Moggi Cecchi, G.Pratesi, S.Caporali UniFi): In the thin section a chondritic texture can be observed, with small PO, POP and RP chondrules and chondrule fragments set in a fine grained matrix. Large olivine crystals in PO chondrules are zoned from core to rim. Olivine is markedly inhomogeneous and Mg-rich in chondrules, while Fe-rich in the matrix. Orthopyroxene in chondrules is inhomogeneous, too, with a core-rim variability. Opaque phases are represented by iron oxides, Fe-Ni alloys and troilite rimming chondrules or present as individual grains scattared in the matrix.

Geochemistry: EMP (V.Moggi Cecchi, G.Pratesi, S.Caporali UniFi); Olivine in both chondrules and matrix (Fa17.3±6.4Fo82.7±6.3; n=107; Fe/Mn = 43.9±30.2); low-Ca pyroxene in both chondrules and matrix (Fs12.1±5.2En87.2±5.4Wo0.7±0.3; n=65; Fe/Mn = 23.1±10.2);

Classification: Ordinary Chondrite (H3); S2; W2. Estimated subtype 3.7.

Specimens: The main mass, weighing 411 g, is own by Mario Di Martino; the type specimen, weighing 20.8 g, and one thin section are on deposit at MSN-FI (Inventory # I-3570).

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Turin Mineral Show
Date:P 2018 Oct
Mass (g):411
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.3±6.4 (N=107)
Ferrosilite (mol%):12.1±5.2 (N=65)
Wollastonite (mol%):0.8±0.3
Classifier:V. Moggi Cecchi, MSN-FI
Type spec mass (g):20.75
Type spec location:MSN-FI
Main mass:Di Martino
Finder:Anonymous
Comments:Field MDM18_19;Inv.I-3570; 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 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)
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Revision
  history:
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