header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 7 Jul 2020
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 11795
Basic information Name: Northwest Africa 11795
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11795
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1270 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (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 26 May 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11795 (NWA 11795)

(Northwest Africa)

Purchased: 2018

Classification: Primitive achondrite (Lodranite)

History: The meteorite was purchased in Tindouf, Algeria, from a Sahrawi dealer.

Physical characteristics: Brownish individual lacking any fusion crust.

Petrography: The meteorite is a breccia predominantly composed of up to 3 mm sized olivine and orthopyroxene grains (mean diameter about 0.6 mm) with related fine-grained mineral debris. More minor phases include Ca-pyroxene, chromite, kamacite, troilite and Ni-bearing pyrrhotite. Ca-pyroxene often ocurrs as fine exsolution lamellae in low-Ca pyroxene and kamacite is mostly altered to Fe-oxides/hydroxides. No feldspar was found in the section studied.

Geochemistry: olivine: Fa10.7±0.1, (Fa10.5-10.8, n=13, FeO/MnO=25±1); low-Ca pyroxene: Fs10.3±0.1Wo2.2±0.2 (Fs10.1-10.5Wo1.9-2.5, n=12, FeO/MnO=16±1); Ca-pyroxene: Fs4.6±0.2Wo43.6±0.5 (Fs4.3-4.9Wo42.8-44.9, n=12, FeO/MnO=11±1); Cr2O3 in Ca-pyroxene: 1.06±0.13 wt.%

Classification: Lodranite according to mineral chemistry, grain size, and absence of feldspar.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2018
Mass (g):1270
Pieces:1
Class:Lodranite
Shock stage:moderate
Weathering grade:strong
Fayalite (mol%):10.7
Ferrosilite (mol%):10.3; 4.6
Wollastonite (mol%):2.2; 43.6
Classifier:A. Greshake, MNB
Type spec mass (g):35
Type spec location:MNB
Main mass:Salamu Hamad
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. 107, MAPS 55, 460-462
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)

Direct link to this page