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 11743
Basic information Name: Northwest Africa 11743
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11743
Observed fall: No
Year found: 2014
Country: Morocco
Mass:help 5 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  H4
Recommended:  H4    [explanation]

This is 1 of 6038 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Mar 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11743 (NWA 11743)

Morocco

Purchased: May 2014

Classification: Ordinary chondrite (H4)

History: A small fragment of the studied meteorite weighting 5.0 g was purchased by I. Baziotis from a dealer in Marrakech, Morocco (May 2014). The stone was a broken fragment partly surrounded by fusion crust. A polished thin section was carefully prepared from the fragment and subsequently examined using optical microscopy to identify the texture and mineralogy.

Physical characteristics: 5.0 g. 1 piece. The color of the meteorite is pale brown. Black fusion crust partly covers the sample. Red-brown oxidation is visible on the exterior surface, around metal grains on cut surfaces and within the matrix.

Petrography (I. Baziotis, AUA; A. Bischoff, IfP): Textural observations of the thin section in reflected light showed a chondritic structure. It contains porphyritic and non-porphyritic chondrules, both Type I (Mg/(Mg+Fe)<90). ?he porphyritic olivine (PO) chondrules have a rounded to oval shape ranging from 300 to 350 ?m, and from 600 to 1200 ?m in size. The groundmass consists of olivine (30 vol.%), low Ca-pyroxene (20 vol.%), clinopyroxene (5 vol.%), plagioclase (5 vol.%) and rare phosphates (apatite). Also, metal-rich material has filled the cracks of the fragment (40 vol%). Shock veins were not observed. The rock matrix is brecciated.

Geochemistry: Mineral Composition and Geochemistry: Coarse grained rock with euhedral to subhedral olivine with narrow compositional range (Fa18.6-19.2), embedded in a translucent feldspathic glassy mesostasis Ab87.6-82.8. Olivine Fa18.9±0.3 (n=23); Low-Ca Pyroxene Fs17.8±0.3 (n=24), Wo0.8±0.1 (n=24).

Classification (I. Bazioti and A.Pantazidis, AUA): This meteorite is a H4 ordinary chondrite. Weathering stage: Minor to slighly moderate oxidation W2, with the major silicates being unaffected.

Specimens: 4.94 g at NHMV.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Marrakech
Date:P May 2014
Mass (g):5.0
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):18.9±0.3 (N=23)
Ferrosilite (mol%):17.8±0.3 (n=24)
Wollastonite (mol%):0.8±0.1 (n=24)
Classifier:Ioannis Baziotis, AUA
Type spec mass (g):4.94 g
Type spec location:NHMV
Main mass:AUA
Comments:Submitted by Ioannis Baziotis
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
NHMV: Naturhistorisches Museum, Burgring 7, 1010 Wien, Austria, Austria; Website (institutional address; updated 18 Jan 2019)
AUA: Department of Natural Resources Management and Agricultural Engineering Agricultural Univ. of Athens Iera Odos 75, 11855 Athens, Greece (institutional address; updated 10 Mar 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1676 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

Direct link to this page