header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Sep 2021
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 11771
Basic information Name: Northwest Africa 11771
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11771
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 50 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 465 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 11 May 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11771 (NWA 11771)

(Northwest Africa)

Purchased: 2014

Classification: HED achondrite (Diogenite)

History: The meteorite was purchased from a local meteorite dealer in Zagora, Morocco.

Physical characteristics: Greyish individual partly covered with fusion crust

Petrography: Monomict breccia predominantly composed of blocky up to 2 mm sized orthoproxenes and more fine-grained cataclastic interstitial regions. Minor phases include feldspar, olivine, silica, chromite, and FeNi metal. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs29.2±0.3Wo4.2±0.2 (Fs28.7-29.5Wo3.9-4.6, n=18, FeO/MnO=27-32); olivine: Fa37.7, n=1, FeO/MnO=54; calcic plagioclase: An92.7±0.4 (An92.2-93.4, n=5)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2014
Mass (g):50
Pieces:1
Class:Diogenite
Shock stage:low
Weathering grade:low
Fayalite (mol%):37.7
Ferrosilite (mol%):29.2
Wollastonite (mol%):4.2
Classifier:A. Greshake, MNB
Type spec mass (g):10
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

Direct link to this page