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Northwest Africa 10870
Basic information Name: Northwest Africa 10870
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10870
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 3.89 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 623 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 22 Oct 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10870 (NWA 10870)

(Northwest Africa)

Purchased: June 2016

Classification: Ureilite

History: The meteorite was purchased in 2016 from a meteorite dealer at the mineral fair in St.Marie aux mines, France.

Petrography: The rock shows a fine-grained, equigranular texture of olivine and orthopyroxene with frequent triple junctions at adjoining mineral grains. Olivine is compositionally homogeneous and orthopyroxene show slight zoning. Although intensely recrystallized the outlines of the original minerals are still visible. Also several characteristic reduced rims are preserved at olivine-carbon contacts. The sample contains lamellar intergrowths of daubreelite and troilite.

Geochemistry: reduced rims in olivine: Fa2.6-5.7; Cr2O3 in ol: ~0.5 wt%

Classification: Ureilite, melt rock.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:St.Marie aux Mines, France
Date:P June 2016
Mass (g):3889
Pieces:1
Class:Ureilite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):22.3±0.3 (n=11)
Ferrosilite (mol%):16.2±1.1 (n=11)
Wollastonite (mol%):2.8±0.8 (n=11)
Classifier:A. Greshake, MNB
Type spec mass (g):24.0
Type spec location:MNB
Main mass:Hanno Strufe
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann      
Volker Heinrich   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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