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Dar al Gani 476
Basic information Name: Dar al Gani 476
     This is an OFFICIAL meteorite name.
Abbreviation: DaG 476
Observed fall: No
Year found: 1998
Country: Libya
Mass:help 2.02 kg
Meteoritical Bulletin:  MB 83  (1999)  Martian (basaltic shergottite)
NHM Catalogue:  5th Edition  (2000)  Martian (shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-basaltic (ol phyric)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 324 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Writeup from MB 83:

Dar al Gani 476


Found 1998 May 1

Martian basalt (shergottite)

A brownish stone weighing 2015 g was found in Dar al Gani, Sahara.  Mineralogy and classification (J. Zipfel and P. Scherer, MPI): fusion crust absent; meteorite has a porphyritic texture, consisting of olivine embedded in a fine-grained matrix of clinopyroxene laths (pigeonite and minor augite) and interstitial feldspathic glass; mineral abundances similar to EET 79001 lithology A; Fe-sulfide, Ti-rich chromites, ilmenite and chromite present; shock features include twinning and fracturing of clinopyroxene, mosaicism of some olivine, and plagioclase converted to feldspathic glass; impact-melt pockets abundant; extensive terrestrial weathering resulted in carbonate veins crosscutting the meteorite along grain boundaries and cracks; bulk chemistry intermediate between basaltic and lherzolitic shergottites, with a high bulk Mg/(Mg + Fe), high concentrations of siderophile elements, relatively low abundances of heavy rare earth elements (HREE), and a strong light rare earth element (LREE) depletion; exposure age 1.1 ± 0.2 Ma; 36Ar/132Xe and 84Kr/132Xe typical of Martian meteorites, and 129Xe/132Xe similar to Chassigny. Oxygen isotopes (I. Franchi, OU): d18O = 4.57, d17O = 2.69‰ rel. SMOW (D17O = 0.317).  The petrography, mineralogy, and noble gas chemistry of DaG 476 and DaG 489 are very similar, and the two are likely paired (L. Folco, MNA-SI, and J. Zipfel and L. Schultz, MPI). Specimens: type specimen, several grams, and one polished section, MPI; main mass with anonymous finder.

Data from:
  Table 6
  Line 133:
Date:May 1998
Mass (g):2015
Classifier:J. Zipfel and St. Schiermeyer (MPI)
Plots: O isotopes:  
   and collections
MNA-SI: Museo Nazionale dell'Antartide, Università di Siena, Via Laterina 8, I-53100 Siena, Italy; Website (institutional address; updated 13 Dec 2011)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
MPI: Max-Planck-Institut für Chemie, Abteilung Kosmochemie, Postfach 3060, D-55020 Mainz, Germany; Website (institutional address; updated 7 Nov 2015)
Search for this meteorite in the Natural History Museum collection (U.K.):   
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References: Published in Meteoritical Bulletin, no. 83, MAPS 34, A169-A186 (1999)
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     Catalogue of Meteorites:   (27° 21'N, 16° 12'E)
     Recommended::   (27° 21' 10"N, 16° 12' 2"E)
Note: the NHM and MetBase coordinates are 0.3 km apart

     This is 1 of 1046 approved meteorites from Al Jufrah, Libya
     This is 1 of 1559 approved meteorites from Libya (plus 25 unapproved names) (plus 2 impact craters)
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