header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 6 Oct 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:
Limit to approved meteorite names
Search text:  
Northwest Africa 12020
Basic information Name: Northwest Africa 12020
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12020
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 576 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2816 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 6 Oct 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12020 (NWA 12020)

(Northwest Africa)

Purchased: 2017 Dec

Classification: Ordinary chondrite (LL6)

Petrography: (K. Metzler, IfP) Monomict breccia with recrystallized texture, showing some relict BO chondrules. Most secondary feldspar grains are >50 µm. Melt pockets and melt veins are present.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa31.3±0.4 (Fa30.7-32.0); n=13. The mean low-Ca pyroxene composition is Fs24.9±0.4Wo1.6±0.1 (Fs24.2-25.6Wo1.3-1.8), n=13.

Classification: LL chondrite based on mineral chemistry. Petrologic type 6 based on the equilibrated state of olivine and pyroxene and grain size of secondary plagioclase

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Tinduf, Algeria
Date:P 2017 Dec
Mass (g):576
Pieces:2
Class:LL6
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):31.3±0.4
Ferrosilite (mol%):24.9±0.4
Wollastonite (mol%):1.6±0.1
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Manuel Nieto Sanchez, Albacete, Spain
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
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 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

Direct link to this page