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Northwest Africa 11197
Basic information Name: Northwest Africa 11197
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11197
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 1610 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Lodranite
Recommended:  Lodranite    [explanation]

This is 1 of 82 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 6 Apr 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11197 (NWA 11197)

(Northwest Africa)

Purchased: 2016

Classification: Primitive achondrite (Lodranite)

History: Two stones weighing 186 and 1424 g were found in Morocco and subsequently purchased in 2015. J. Donald Cline and John Sinclair acquired the samples from a meteorite prospector at the Tucson Gem and Mineral Show in February 2016.

Physical characteristics: Sample has an irregular, weakly conical shape. Orange caliche covers 75% of the stone, which may have originally been buried. In small areas, a dark-colored relict fusion crust is visible underneath the caliche. The other side of the stone is crystalline and composed of dark gray and green interlocking crystals.

Petrography: Description and classification (A. Love, App): Sample is a protogranular breccia of up to 4 cm long clasts and related debris composed of 1.5-3.5 mm, finely exsolved Ca-pyroxene and olivine. Accessory minerals are: FeNi metal, chromite and troilite. Olivine occurs as grains and melt inclusions within cpx. Some areas of the sample contain symplectic intergrowths olivine and chromite.

Geochemistry: (A.Love, App) Fa11.6±0.2, Fe/Mn=46.0 N=8; Ca pyroxene Fs4.7±0.2Wo44.0±1.7, N=10.

Classification: Primitive achondrite (lodranite). Texture, grain size and mineral compositions indicate sample is a lodranite breccia.

Specimens: PARI holds the 155.48 g and 1424 g masses. A 20.87 g type specimen composed of 2 slices, several small fragments and one polished thin section are on deposit at App.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):1610
Pieces:12
Class:Lodranite
Fayalite (mol%):11.6±0.2 (N=8)
Ferrosilite (mol%):4.7±0.2 (N=10)
Wollastonite (mol%):44.0±1.7
Classifier:A. Love, App
Type spec mass (g):20.87
Type spec location:App
Main mass:PARI
Finder:Anonymous
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)
PARI: Pisgah Astronomical Research Institute 1 Pari Dr Rosman, NC 28772, United States (institutional address; updated 13 Sep 2016)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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