Iron - Ungr.
Name
*click on the Name for more information
Structure Class
Iron
Chemical Class
Iron, ungrouped
Country
Russia
Year found
1913
Mass
209.4 kg
[Museum Collection]
(1) 2885g
BONHAMS Auction 7 DEC 2021 Lot#2363
BONHAMS Auction 7 DEC 2021 Lot#2363
Tuva (Тува). No such meteorite exists. The name Tuva (Тува) in all probability refers to the meteorite known as the Chinga (read Chinge, Чинге), given on p. 79 of the Catalogue.
Name
*click on the Name for more information
Structure Class
Iron
Chemical Class
Iron, ungrouped
Country
Russia
Year found
2000
Mass
3 t
[Museum Collection]
(1) 68g
A 40 kg iron was found by Oleg Gus’kov, Moscow resident, as he was returning home from collecting mushrooms near the village of Dronino in the Ryazan district. In early 2003, it was taken to Vernad, and identified as meteoritic. In summer 2003, scientific expeditions and meteorite hunters collected more than 600 fragments (the largest is 250 kg) totaling about 3 000 kg and occurring at a depth of 0.2-2 m across an area of 0.5x1.5 km. The distribution of the fragments suggests that the meteorite formed a now-buried crater about 30 m in diameter. This crater is not reflected in the present-day topography of the site. No historical records exist of a meteorite fall, thus it appears likely that the meteorite fell earlier than the 12th century when the area was largely unpopulated. Classification and mineralogy (D. Badyukov, M. Nazarov, Vernad; J. Wasson, UCLA): the Dronino iron is an ataxite containing sulfide inclusions (~10 vol.%) and consisting of kamacite (7.0±0.5 wt% Ni and 0.75 wt% Co) and rare taenite (26.5±0.5 wt% Ni and 0.35 wt% Co) as elongated precipitates (1-3 μm in size) which form linear and banded textures; sulfide inclusions (up to a few mm in size) rounded and elongated along the banding; accessories are chromite and Fe phosphate (graftonite?); no phosphide was found and P is not detectable in metal with EMP; INAA data: Ni 98.1, Co 5.54 (mg/g), Cr 37, Cu 32, Ga
Name
*click on the Name for more information
Structure Class
Iron
Chemical Class
Iron, ungrouped
Country
Egypt
Year found
2009
Mass
1.6 t
[Museum Collection]
(1) 22.7g (2) 5.4g
History: A total of about 1600 kg of iron meteorite shrapnel (thousands of pieces), ranging in mass from
Name
*click on the Name for more information
Structure Class
Iron
Chemical Class
Iron, ungrouped
Country
Turkey
Year found
1999
Mass
152 kg
[Museum Collection]
(1) 27.3g
History: A 152 kg piece of iron was discovered by Mr. Cemil Gunay in April 1999, while he was plowing a field. The specimen was 30 cm deep. Mr. Gunay took the specimen to his home where he attempted to cut it. He applied rust-proofing spray. It was then kept outside in a hot and dry environment in his garden for approximately 10 years, when the existence of the specimen was noted by Turkish meteorite collector Mesut Kasikci (a resident of France), who then informed academic research institutions about the find. The specimen was brought by Mesut Kasikci to Dr. Catherine Caillet Komorowski of the MNHNP. Physical characteristics: The specimen measures approximately 40 × 60 × 25 cm and has a sculpted appearance, with large irregular cavities on one side and smooth regmaglypts on the other. Weathering is minimal. Petrography: (C. Caillet Komorowski, MNHNP): SEM investigation reveals a well-developed Widmanstätten pattern consistent with a finest octahedrite. Plessite is common. Fractured schreibersite grains are present and represent about 1.3% of the mode. Sulfide, silicate, or graphite inclusions are absent. No tetrataenite was found, also confirmed by magnetic properties (P. Rochette, CEREGE). Lack of Neumann lines indicates relatively low shock. Electron microprobe analyses indicate that schreibersite contains high Ni (about 31.5 wt%). Kamacite contains 7.4-6.5 wt% Ni. Geochemistry: Bulk composition: INAA data (J. Duke and C. Herd, UAb): Ni = 9.04±0.07 wt%, Co = 0.420±0.003 wt%; Ir = 2.15±0.03, Au = 0.434±0.009; Ga <0.8; As = 2.37±0.09; W = 1.03±0.04; Re = 0.17±0.01; Cr <15; Cu <21; Ge
