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Iron - Ungr.

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Chinga

Name

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Structure Class

Iron

Chemical Class

Iron, ungrouped

Country

Russia

Year found

1913

Mass

209.4 kg

[Museum Collection]

(1) 2885g

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.

Dronino

Name

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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

Gebel Kamil

Name

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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

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Structure Class

Iron

Chemical Class

Iron, ungrouped

Country

Mali

Year found

1900

Mass

37.5 kg

[Museum Collection]

(1) 2.35g

N'Goureyma
Tishomingo

Name

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Structure Class

Iron

Chemical Class

Iron, ungrouped

Country

United States of America

Year found

1965

Mass

260 kg

[Museum Collection]

(1) 5.61g   (2) 5.72g   (3) 5.72g

Turgut

Name

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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

NWA859 (Taza)

Name

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Structure Class

Iron

Chemical Class

Iron, ungrouped

Country

(Northwest Africa)

Year found

2001

Mass

75.3 kg

[Museum Collection]

(1) 11.9g

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