header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 12 Mar 2019
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:  
Twayla 001
Basic information Name: Twayla 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No, it is doubtful that it is a fall
Year found: 2017
Country: Western Sahara
Mass:help 500 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 364 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 14 Dec 2018
Writeuphelp
Writeup from MB 107:

Twayla 001        ~26°50.2’N, ~9°11.6’W

Saguia el Hamra, Western Sahara

Find, doubtful fall: 2014 Dec

Classification: HED achondrite (Howardite)

History: The family of nomad Lahsen Duine spent the winter of 2014/2015 in the Wad La’waj Talli area, nearly 70 km NE of Bir Lahlou. Short before the end of he year, they were awakened by lightning, followed by a curious whistling noise. In March 2015, the children discovered two black stones on the ground, in the grassy scrub, while they were catching their goats. The stones were discovered within several hundred m of each other. The bigger stone was purchased in Ouarzazate in March 2017.

Physical characteristics: Two nearly complete individuals of 318 and approximately 150 g with glossy black fusion crust. Cut face shows a breccia with fragmental light and darker clasts set in a light-gray groundmass. Some fractures show penetrating fusion curst; no traces of terrestrial fillings are recognizable.

Petrography: (R. Bartoschewitz, Bart) Polymict breccia with at least three distinct lithologies: diogenite, eucrite and anorthosite. Ubiquitous iron-nickel metal, Fe-sulfide and chromite present.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Diogenite pyroxene Fs35.0±0.7Wo5.2±1.4, Fe/Mn=27, n=8; chromite CRAL 78.3±1.2, FFM 88.6±3.6. Eucrite pyroxene Fs40.0±1.8Wo9.4±2.5, Fe/Mn=30, n=15; plagioclase An89.7±1.5Or0.3±0.1, n=14; olivine Fa38.5, Fe/Mn=34, n=1. Anorthositic clast An93.0±0.8Or0.3±0.1, n=5. Matrix pyroxene Fs35.0±3.2Wo5.6±0.9, Fe/Mn=28, n=9; plagioclase An91.9±2.1Or0.3±0.1, n=2; olivine Fa46.3±12.7, Fe/Mn=51 , n=2; chromite CRAL 79.4±2.0, FFM 90.4±0.4; kamazite Ni 0.0-2.0, Co 0.2-0.7 wt-%, n=15, troilite.

Classification: HED achondrite (howardite)

Specimens: 20.0 g on deposit at Kiel, main mass with Dieter Janek, 21.5 g Bart.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Saguia el Hamra
Origin or pseudonym:dry river (wadi)
Place of purchase:Ouarzazate
Date:2014 Dec
Latitude:~26°50.2'N
Longitude:~9°11.6'W
Mass (g):~500
Pieces:2
Class:Howardite
Fayalite (mol%):43.7±10.0 (n=3)
Ferrosilite (mol%):35.4±1.4 (n=3)
Wollastonite (mol%):4.4±1.1
Magnetic suscept.:3.34
Classifier:Bart
Type spec mass (g):20.03
Type spec location:Kiel
Main mass:Dieter Janek, Eppan, Italy
Finder:Lahsen Duine family
Comments:working name DJ2017/12; submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Lehmweg 53, D-38518 Gifhorn, Germany; Website (private address; updated 4 Aug 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Rainer Bartoschewitz            
Geography:

Western Sahara
Coordinates:
     Recommended::   (26° 50' 12"N, 9° 11' 36"W)

Statistics:
     This is 1 of 78 approved meteorites from Saguia el Hamra, Western Sahara
     This is 1 of 198 approved meteorites from Western Sahara (plus 19 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page