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| Dar al Gani 1066 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Dar al Gani 1066 This is an OFFICIAL meteorite name. Abbreviation: DaG 1066 Observed fall: No Year found: 1999 Country: Libya Mass:  125 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 33 approved meteorites classified as Ureilite-pmict. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 14 May 2015 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 104:
Dar al Gani 1066 (DaG 1066) 27°09.11’N, 16°16.20’E Al Jufrah, Libya Find: 1999 Feb Classification: Ureilite (polymict) History: A fragmented stone, totally weighing 125 g, was found by Romano Serra, OAM, during an expedition to search for meteorites. Physical characteristics: Four fragments, each one partially covered by fusion crust Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): A thin section of the meteorite shows a coarse-grained matrix surrounding various inclusions of different lithologies. The matrix is mainly composed by olivine crystals from 0.2 to 1.5 mm of size and minor pyroxene and feldspar. Olivine crystals are zoned, with Mg-rich rims. Opaque phases are pyrrhotite, FeNi metal, suessite FeSi, hapkeite, present as tiny inclusions along olivine grain boundaries, and graphite. Most of the inclusions are fine-grained ureilitic aggregates, consisting of 90% olivine crystals separated by a diopsidic, Al-rich clinopyroxene. Two inclusions display fine grained (max. width 50 μm) textures and contain 60% vol. Fe-rich olivine crystals, 20 % Al-rich clinopyroxene and 20 % opaques, consisting of equal parts of Fe-Ni alloy and pentlandite. Two inclusions are chondrules made of forsteritic olivine and enstatitic pyroxene, with minor plagioclase and no opaques. Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): Matrix: olivine (Fa3.0-26.8, mean Fa15.4; Fe/Mn = 50.9, n = 7); pigeonite (Fs14.1En78.6Wo7.3; Fe/Mn = 20.5, n = 5); Ureilitic inclusions: olivine (Fa26.4; Fe/Mn = 58.8, n = 8); pigeonite (Fs22.6En70.1Wo7.3; Fe/Mn = 16.2, n = 6); Al-rich clinopyroxene (SiO2 42.6, TiO2 0.9, Al2O3 10.3, Cr2O3 1.9, FeO 11.4, MgO 14.5, CaO 10.8, Na2O 4.0, all in Wt.%); Metal-rich inclusions: (Fa39.8; Fe/Mn = 94.7, n = 7); Al-rich clinopyroxene (SiO2 45.9, TiO2 0.3, Al2O3 8.4, Cr2O3 2.1, FeO 9.6, MgO 15.9, CaO 10.4, Na2O 4.2, all in Wt.%); Fo,En-rich chondrules: olivine (Fa0.3-3.0, mean Fa1.2; Fe/Mn = 9.4, n = 6); enstatite (Fs0.8En97.7Wo2.5; Fe/Mn = 1.3, n = 5); sodic plagioclase (An52.3Ab41.1Or6.0, n=5). Oxygen isotopes: (I.Franchi, R.Greenwood, OU) δ17O = 3.92‰, δ18O = 8.79‰, Δ17O = -0.66‰. Classification: Ureilite (polymict) with high degree of shock and low degree of weathering. Specimens: A total of 21.3 g specimen is on deposit at MSN-FI. The main mass is on deposit at OAM. | ||||||||||||||||||||||||||||||||||||||
| Data from: MB104 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||||||||||
| Institutions and collections |
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) 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) MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022) UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013) |
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| References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:
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Statistics: This is 1 of 1046 approved meteorites from Al Jufrah, Libya This is 1 of 1540 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||||||||
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