ABADLA 004

 

Abadla 004

Found Sahara, 2023

Achondrite

Winonaite

Specimen is a 1.50g endcut



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Basic information Name: Abadla 004 This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2023
Country: Algeria
Classification history: Meteoritical Bulletin, MB 113 (2025): Winonaite
Recommended: Winonaite  
Writeup
  Writeup from MB 113:

Abadla 004        30.873960°N, 2.802016°W

Bechar, Algeria

Purchased: 2023

Classification: Primitive achondrite (Winonaite)

History: Purchased by Sahrawi meteorit hunters in Abadla, Algeria.

Petrography: (K. Metzler, IfP) Achondrite with metamorphic texture, showing frequent 120° triple junctions and partly poikilitic intergrowths. It consists of forsterite, enstatite, diopside, plagioclase, and Fe-Ni metal. Much of the latter is terrestrially oxidized, forming veins of alteration products along grain boundaries and crosscutting mineral grains. Typical grain sizes vary between 200 and 500 µm. Accessories are troilite, schreibersite, and daubréelite.

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa0.2±0.1 (Fa0.1-0.2); Fe/Mn (at.): 1.4; n=8. Mean low-Ca pyroxene composition: Fs0.6±0.1Wo2.1±0.2 (Fs0.4-0.8Wo1.8-2.4); Fe/Mn (at.): 0.7; n=6. Mean composition of Ca-rich pyroxene: Fs0.7±0.6Wo44.3±0.6 (Fs0.3-1.7Wo43.5-44.8); Fe/Mn (at.): 1.7; n=5. Mean feldspar composition: An9.4±0.5Or3.9±0.3 (An8.7-9.8Or3.7-4.3); n=5

Classification: Winonaite, based on texture and mineral chemistry.

Data from: MB114
Table 0 Line 0:
State/Prov/County: Bechar
Place of purchase: Abadla, Algeria
Date: P 2023
Latitude: 30.873960°N
Longitude: 2.802016°W
Mass (g): 1650
Pieces: Many
Class: Winonaite
Shock stage: M-S1
Weathering grade: Moderate
Fayalite (mol%): 0.2±0.1
Ferrosilite (mol%): 0.6±0.1; 0.7±0.6
Wollastonite (mol%): 2.1±0.2; 44.3±0.6
Classifier: K. Metzler, IfP
Type spec mass (g): 20
Type spec location: IfP
Main mass: Mohamed Ali Loud
Comments: Submitted by K. Metzler, IfP
Institutions and collections
  IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 2012-01-23)

About Us

The WWMeteorites team (for "WorldWide Meteorites" - Meteorites from around the world) was created in 2003 with the primary goal of traveling around globe in search of these fascinating celestial objects, and make them available for Science... and Collectors. Since 2017, the team has established its base camp on the island of Unst (Shetland, UK).

With four or five trips per year on average, the number of finds (in countries as diverse as Tunisia, Spain, Qatar, the Sultanate of Oman ...) has quickly become important. WWMeteorites therefore collaborates with several laboratories that analyze, and classify the new meteorites, mainly the Museum Fur Naturkunde (Berlin), the CEREGE (University of Aix-Marseille), and the Appalacjain State University (North Carolina). WWmeteorites (under the name of its founder, Fabien Kuntz.)  have already more than 500 meteorites listed in the Meteoritical Society Database.

In order to have a classification and an official referencement established, as well as to allow the long-term research on the meteorites, a part of 20% of each find by WWmeteorites is deposited in a lab
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