header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 4 Dec 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 12386
Basic information Name: Northwest Africa 12386
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12386
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1481 g
Classification
  history:
Recommended:  L5    [explanation]

This is 1 of 7516 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 20 Jan 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 12386 (NWA 12386)

(Northwest Africa)

Purchased: 2018 Mar

Classification: Ordinary chondrite (L5)

History: A meteorite, broken into two pieces, was purchased at Ouarzazate, Morocco, in May 2018. The smaller one, 289.1 g, has a broken surface, with the remaining surface covered with fusion crust. The cut surface of the smaller meteorite indicates the sample has an achondritic texture. The larger stone, 1192.5 g, is composed of two parts: the chondritic main body and an igneous clast. The larger stone also has a broken surface, with other surfaces covered by fusion crust.

Physical characteristics: The meteorite is composed of two lithologies: an ordinary chondrite and an igneous clast.

Petrography: The igneous clast is composed mainly of olivine (70 vol%), feldspar (15 vol%), high-Ca pyroxene, and minor minerals (including phospate, troilite and Fe-Ni metal). Almost no low-Ca pyroxene was found. The abundance of Fe-Ni metal is about 1 vol%. Olivine occurs as phenocrysts, with a particle size of 200-300 μm. The feldspar occurs as interstitial grains filled with skeletal crystals of high-Ca pyroxene.

Geochemistry: For the L5 ordinary lithology: Olivine Fa23.1±2.7 (N=23), CaO 0.04±0.03 wt% MnO 0.42±0.05 wt%; low-Ca pyroxene Fs21.7±2.7Wo2.1±0.2 (N=6). For the igneous clast: Olivine Fa22.1±3.3 N=34), CaO 0.07±0.06 wt% MnO 0.41±0.05 wt%. Oxygen isotopes (Huiming Bao, LSU): Analyses of three acid-washed whole rock of the clast lithology by CO2 laser fluorination: δ18O = 4.803, 4.825, 4.795; δ17O = 3.568, 3.552, 3.543; Δ17O = 1.020, 0.992, 0.999 (all permil).

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Ouarzazate, Morocco
Date:P 2018 Mar
Mass (g):1481
Pieces:2
Class:L5
Fayalite (mol%):23.1 (L5); 22.1 (16.0-30.8, clast)
Ferrosilite (mol%):21.7 (L5)
Wollastonite (mol%):2.1 (L5)
Classifier:Peng H. and Zhang S., IGCAS
Type spec mass (g):40
Type spec location:IGCAS
Main mass:Xu Dengqin
Finder:unknown
Comments:Submitted by Li Shijie
Plots: O isotopes:  
Institutions
   and collections
IGCAS: Institute of Geochemistry Chinese Academy of Sciences, Guiyang, China (institutional address; updated 27 Mar 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

Direct link to this page