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Dar al Gani 1054
Basic information Name: Dar al Gani 1054
     This is an OFFICIAL meteorite name.
Abbreviation: DaG 1054
Observed fall: No
Year found: 1999
Country: Libya
Mass:help 28.4 g
Classification
  history:
Meteoritical Bulletin:  MB 99  (2011)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 20 May 2011
Writeuphelp
Writeup from MB 99:

Dar al Gani 1054 (DaG 1054)        27°25.66’N, 16°09.93’E

Al Jufrah, Libya

Found: 1999

Classification: Ureilite

History: A single 28.4 g stone was found by Romano Serra in a rocky desert area of Libya.

Physical characteristics: Fusion crust absent. Cut surface displays an achondritic texture.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, MSP) Sample fine-grained and homogeneous, with mosaicized texture. Dominated by small (≤30 μm) rounded olivine and rare orthopyroxene. Carbon-rich material, including very small diamonds, occurs at grain boundaries but no distinct aggregates of carbonaceous material are visible. Opaque phases dominated by suessite [(Fe,Ni)3Si], dispersed in small (≤100 μm) grains or subparallel metal veins, commonly altered to oxides. Presence of rare sulfide grains (mainly troilite).

Geochemistry: Silicates unzoned. Low–Ca pyroxene: Fs12.2-20.9Wo0.7-3.0, Cr2O3=0.85-0.92 wt%; olivine (Fa11.0–17.1, CaO=0.29–0.31 wt%, Cr2O3=0.80–0.85 wt%). Suessite (at%) has variable composition, with 2 main clusters at Si21Fe78 (Cr=0.68, Ni=0.49) and at Si23Fe74 (Cr=1.34, Ni=1.54) -Fe0.96Ni0.04. Troilite contains up to 4.3 wt% Cr.

Classification: Achondrite (ureilite, polymict, anomalous). Anomalous features include absence of zoned olivine, mosaicized texture, presence of suessite with variable composition and fine-grained texture. In spite of the similar abundance of suessite, a pairing with NWA 1241 may be excluded considering the different modal pyroxene/olivine ratio.

Specimens: A total of 8 g specimen and one thin section are on deposit at MSP (MSP 5138). Romano Serra holds the main mass.

Data from:
  MB99
  Table 0
  Line 0:
State/Prov/County:Al Jufrah
Date:1999
Latitude:27°25.66'N
Longitude:16°09.93'E
Mass (g):28.4
Pieces:1
Class:Ureilite
Shock stage:high
Weathering grade:low
Fayalite (mol%):11.0-17.1, mean 16.6
Ferrosilite (mol%):13,6-20.9, mean 16.0
Wollastonite (mol%):0.7-3.1, mean 1.6
Classifier:Vanni Moggi Cecchi, Stefano Caporali, Giovanni Pratesi, MSP
Type spec mass (g):8
Type spec location:MSP
Main mass:OAM
Finder:Romano Serra
Comments:Submitted by Vanni Moggi Cecchi
Institutions
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 5 Mar 2014)
OAM: Museo del Cielo e della Terra Vicolo Baciadonne 1 40017 San Giovanni in Persiceto ( BO) Italy Osservatorio Astronomico e Museo "Giorgio Abetti", San Giovanni Persiceto, Bologna, Italy; Website (institutional address; updated 31 Oct 2012)
Catalogs:
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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Geography:

Libya
Coordinates:
     Recommended::   (27° 25' 40"N, 16° 9' 56"E)

Statistics:
     This is 1 of 1046 approved meteorites from Al Jufrah, Libya
     This is 1 of 1496 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)
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