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Werdama
Basic information Name: Werdama
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 2006
Country: Libya
Mass:help 4 kg
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  H5
Recommended:  H5    [explanation]

This is 1 of 10254 approved meteorites (plus 18 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 17 Apr 2008
Writeuphelp
Writeup from MB 94:

Werdama                   32° 47.839N, 21° 47.228E

Werdama village, Al-Beda, Al-Jabal Al-Akhdar, Libya

Fall: 21 May 2006, 7:30 a.m. local time (UT+2)

Ordinary chondrite (H5)

History (M. Abu Anbar, TantaU; R. Kryza, UTWroc, T. Przylibski, WTWroc, and G. El Bahariya, TantaU): A bombing sound and cloud of dust was observed in the village during the infall on an apple farm. A crater of 30 × 20 cm and ~10 cm deep. No exact information about the meteorite finder. (probably, the owner of the apple farm). Geologist Mohamed Abu Anbar, TantaU got a few pieces for research from the finder during his visit to the site, shortly after the fall.

Physical characteristics: Reportedly, five pieces were found, with estimated total mass about 4–5 kg. The diameter of the stone was about 25 cm and it had a light gray color, a brown to black fusion crust ~1 mm thick.

Petrography: (R. Kryza, UWroc; T. Przylibski, UTWroc) The stone shows a low degree of shock: locally, opaque minerals are fractured and the cracks rarely continue into the neighboring silicates. The matrix (10 vol%) has a fine, inequigranular texture. The main component is olivine, subordinate low-Ca pyroxene and Ca pyroxene. Secondary feldspar grains, 20–90 μm large, are minor. Occasionally apatite is found. Opaque minerals vary between 2 and 15 vol%. Kamacite dominates over taenite, together = 6-8 vol%. Troilite and chromite are also common. The grain sizes of the opaques are 0.01-1.5 mm. Chondrules constitute 60 vol%, with a size range of 0.23-1.86 mm (mean 0.57 mm, standard deviation = 0.33).

Geochemistry: Olivine (Fo79.7, Fa19.7); pyroxene (Wo1.3En81.0Fs17.7); feldspar (Ab82.8An11.8Or5.4): kamacite (Ni 6.1–9.4 wt%); taenite (Ni = 27.4–51.8 wt%).

Classification: Ordinary chondrite (H5), S1, W0.

Type specimens: Main mass of 2 kg (20 cm in length) and 300 g are deposited in GMAlBeda Geological Museum, and 250 g in PDAlBeda; 2 g and four thin sections are deposited in UWroc.

 

Data from:
  MB94
  Table 1
  Line 8:
State/Prov/County:Libya
Date:21-May-06
Latitude:32°47.839N
Longitude:21°47.228'E
Mass (g):2552
Pieces:3
Class:H5
Shock stage:S1
Weathering grade:W0
Fayalite (mol%):19.8
Ferrosilite (mol%):17.7
Wollastonite (mol%):1.3
Classifier:R. Kryza, T. Przylibski (UTWroc)
Type spec mass (g):2300
Main mass:GMAIBeda
Institutions
   and collections
GMAIBeda: Geological Museum, Omar El-Mokhtar University, Al Beda, Libya (institutional address)
PDAlBeda: Physics Department, Omar El-Mokhtar University, Al Beda, Libya (institutional address)
TantaU: Tanta University, Faculty of Science, 31527 Tanta, Egypt (institutional address)
UTWroc: Wroclaw University of Technology, Faculty of Geoengineering Mining and Geology, Institute of Minings, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Geography:

Libya
Coordinates:
     Recommended::   (32° 47' 50"N, 21° 47' 14"E)

Statistics:
     This is the only approved meteorite from Al Jabal al Akhdar, Libya
     This is 1 of 1515 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)
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