1.57 grams Shirokovesky pallasite (not a Meteorite) tricked the experts with COA

Description

Name: Shirokovsky
This is NOT a meteorite.
Observed fall:
Reported as a fall on Feb. 1, 1956
Country:
Russia
Mass:
150 kg
This is the famous man-made faked meteorite that got a
classification
in 2002. But has been proven to be a fake. Even the story about it falling from the sky on Feb 1, 1956 is a huge Russian lie.
“Shirokovsky pallasite”,
special statement
.
Specimens of an object known as the “Shirokovsky pallasite,” recently acquired by a variety of public and private collections, are probably not meteorites. The petrology and geochemistry of this object strongly suggest that it has a terrestrial origin. Below is an account of the 1956 bolide that may have produced meteorites (still undiscovered), followed by a description of the probable pseudometeorite.
At 03:30 UT on 1956 Feb 1, a fireball shining brighter than the sun and leaving a smoke trail was observed by numerous eyewitnesses in an area of about 500 km
2
across Russia. The fireball disappeared in 5-6 seconds but the trail was visible for an hour. Windows in nearby villages were broken by the shock wave. A meteorite reportedly fell on the frozen Shirokovsky reservoir (58°48'N, 57°57'E), situated on the Kosva River near Shirokovsky village and the cities of Ugle-Uralsk and Kizel, Producing a 42-cm diameter hole in 80-cm thick ice. Magnetic particles enriched in Ni were extracted from the ice surrounding the hole. Several attempts by divers to recover the meteorite on the bottom were not successful. In early 2002, anonymous searchers found many fragments, totaling ~150 kg, of iron-rich material at the site.
Mineralogy and petrography (M. A. Nazarov,
Vernadsky Inst
., L. A. Taylor,
University of Tennessee
): The material is breccia-textured, with angular silicate clasts in a metal-rich matrix. Clasts consist mainly of olivine fragments up to 1 cm (Fa
3-39
, avg = Fa
12
, CaO up to 1 wt%, NiO up to 0.3 wt%, Fe/Mn = 8-34 at., avg = 21) and rare diopside grains (Fs
3-19
Wo
43-50
). Olivine contains small inclusions of diopside, roedderite (?), Mg-rich wustite and magnesioferrite. There is no reaction zone between olivine fragments and the metallic matrix, however diopside has reacted with the matrix to produce unknown Ca,Fe,Mg-rich phases, larnite and merwinite. The matrix is metal-wustite eutectic containing minor Ca-rich fayalite. The metal contains 20-47 wt% Ni (avg = 26.5) and 0.8-2.2 wt% Co (avg = 1.3). Phosphorus and Cu were not detected. Sulfides, phosphides, phosphates, chromite, and Al-bearing phases were not found.
Superficially, the mineralogy resembles that of pallasites, and the Fa number and Fe/Mn ratio of the olivine are comparable to those of pallasite olivines. However the high Ni of the olivine is distinct from that in all metal-rich meteorites. The metal-wustite eutectic has never been documented in meteorites. Accessory minerals are atypical of meteorites, and accessory phases typical of stony-iron meteorites are absent. Olivine chemistry (Fa, Fe/Mn, CaO, NiO) resembles that in some terrestrial carbonatites. Olivine was not equilibrated with the matrix melt, which crystallized quickly under highly oxidizing conditions.
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#GMA0021
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