header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 23 May 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 16295
Basic information Name: Northwest Africa 16295
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16295
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1741 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  L7
Recommended:  L7    [explanation]

This is 1 of 33 approved meteorites classified as L7.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Nov 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 16295 (NWA 16295)

(Northwest Africa)

Purchased: 2021 May

Classification: Ordinary chondrite (L7)

Petrography: (K. Metzler, IfP) Chondrite with distinct recrystallization texture. Some mm-sized roundish inclusions are present which may represent chondrule relicts. Contains centimeter-long crosscutting metal veins and elongated cavities. Compared to other equilibrated L chondrites this sample appears to be enriched in metal and sulfide by parent body processes.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa23.9±0.3 (Fa23.4-24.4; n=11). The mean low-Ca pyroxene composition in clasts is Fs20.0±0.4Wo3.6±1.0 (Fs19.5-21.0Wo2.4-5.2; n=11) with a mean CaO concentration of 1.84±0.5 (1.25-2.6) wt%.

Classification: L chondrite based on mineral chemistry. Petrologic type based on the CaO concentration in low-Ca pyroxene. This value (1.84 wt%) is far above the limit value for type 7 OCs of 1.0 wt% (Tait et al., 2014).

Bibliography:
  • Tait A.W., Tomkins A.G., Gode B.M., Wilson S.A., Wilson, and Hasalova P. (2014) Investigation of the H7 ordinary chondrite, Watson 012: Implications for recognition and classification of Type 7 meteorites. Geochim. Cosmochim. Acta 134 175-196. (link)
Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Guelmim, Morocco
Date:P 2021 May
Mass (g):1741
Pieces:1
Class:L7
Shock stage:C-S2
Weathering grade:W3
Fayalite (mol%):23.9±0.3
Ferrosilite (mol%):20.0±0.4
Wollastonite (mol%):3.6±1.0
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Oulkouch Mustapha and Abdelkabir Oulgour
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. 112, in preparation (2023)
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 9746 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

Direct link to this page