header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 11 Dec 2018
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:
Limit to approved meteorite names
Search text:  
Northwest Africa 11585
Basic information Name: Northwest Africa 11585
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11585
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 70 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 480 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 3 Feb 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11585 (NWA 11585)

North West Africa, Morocco

Purchased: October 2015

Classification: Ureilite

Petrography: (H. Downes, Birkbeck) Equigranular, anhedral, slightly poikilitic crystals of olivine and low-Ca pyroxene, with minor interstitial metal and very rare carbon. There is no evidence of zoning in minerals. This meteorite does not exhibit a typical ureilite texture, but is more similar to the Hughes Type.

Geochemistry: Mineral compositions and geochemistry: (N. Rai, N.V. Almeida, NHM). All analyses by EPMA. Olivine cores Fa10.8±0.6, 0.45 to 0.52 wt% MnO, 0.50 to 0.55 wt% Cr2O3, 0.14 to 0.68 wt% CaO, < 0.01 wt% Ni, (N=32). Pyroxene Fs10.1±0.8Wo8.3±0.6, 0.38 to 0.52 wt% MnO, 0.89 to 0.92 wt% Cr2O3, (N=11).

Classification: Ureilite

Specimens: 14.2 g on deposit at the NHM. M. Bilet holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:North West Africa
Place of purchase:Ouarzazate
Date:P October 2015
Mass (g):70
Pieces:1
Class:Ureilite
Weathering grade:low
Fayalite (mol%):10.8±0.6 (N=32)
Ferrosilite (mol%):10.1±0.8 (N=11)
Wollastonite (mol%):8.3±0.6 (N=11)
Classifier:N. Rai, N. V. Almeida, H. Downes
Type spec mass (g):14.2
Type spec location:NHM
Main mass:Morten Bilet
Comments:Submitted by N. V. Almeida
Institutions
   and collections
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1322 approved meteorites from Morocco (plus 14 unapproved names) (plus 1 impact crater)

Direct link to this page