header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 30 Nov 2019
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 12739
Basic information Name: Northwest Africa 12739
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12739
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 91 g
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 434 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 27 Jul 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12739 (NWA 12739)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Diogenite)

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

Physical characteristics: Single stone partly covered by fusion crust.

Petrography: The meteorite is an achondritic breccia composed of two types of low-Ca pyroxene, olivine, and less abundant calcic feldspar. Minerals are up to 4 mm in size and embedded in fine-grained clastic matrix. Minor phases include silica, chromite, FeS, and metallic Fe.

Geochemistry: pyroxene: Fs22.3.0±0.2Wo1.4±0.1 (Fs22.0-22.6Wo1.2-1.5, n=13, FeO/MnO=25-28); pyroxene: Fs29.7±1.8Wo2.8±0.3 (Fs28.1-33.9Wo2.6-3.6, n=12, FeO/MnO=30-33); olivine: Fa28.2±0.7 (Fa27.1-29.2, n=17, FeO/MnO=48±2); calcic plagioclase: An90.7±0.4 (An90.0-91.1, n=16)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2019
Mass (g):91
Pieces:1
Class:Diogenite
Shock stage:low
Weathering grade:low
Fayalite (mol%):28.2
Ferrosilite (mol%):22.3; 29.7
Wollastonite (mol%):1.4; 2.8
Classifier:A. Greshake, MNB
Type spec mass (g):18.2
Type spec location:MNB
Main mass:Fabien Kuntz
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

Direct link to this page