header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 19 Jun 2024
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 16758
Basic information Name: Northwest Africa 16758
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16758
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 105 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 646 approved meteorites (plus 2 unapproved names) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 10 Jun 2024
Writeuphelp
Writeup from MB 113:

Northwest Africa 16758 (NWA 16758)

(Northwest Africa)

Purchased: 2022 Jun

Classification: Carbonaceous chondrite (CO3)

History: Purchased from a Moroccan mineral dealer at the meteorite show in Ensisheim, France

Physical characteristics: Individual with wind-ablated fusion crust.

Petrography: (K. Metzler, IfP) Chondrules, chondrule fragments, and CAIs are embedded in a fine-grained dark brown matrix (about 30 vol% matrix). The vast majority of chondrules belong to chemical type I. Chondrule sizes mostly between 50 and 400 µm.

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa32.2±9.6 (Fa12.9-38.5); n=12. Mean low-Ca pyroxene composition:Fs7.1±3.2Wo2.1±1.1 (Fs2.5-13.2Wo0.1-3.7); n=13.

Classification: CO chondrite based on CAI occurrence, small chondrule size, chondrule-matrix ratio, and mineral chemistry. Petrologic type 3 based on the chemical variation of olivine and pyroxene. The estimated petrologic subtype is 3.7, based on the PMD of Fa values (29.8).

Data from:
  MB113
  Table 0
  Line 0:
Place of purchase:Ensisheim, France
Date:P 2022 Jun
Mass (g):105
Pieces:1
Class:CO3
Shock stage:C-S1
Weathering grade:Moderate
Fayalite (mol%):32.2±9.6
Ferrosilite (mol%):7.1±3.2
Wollastonite (mol%):2.1±1.1
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Anonymous
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. 113, in preparation (2024)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Knut Metzler         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9776 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

Direct link to this page