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METEORITE PALLASITE SEYMCHAN ETCHED SLICE 249g NR!!!
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.jpg "METEORITE PALLASITE SEYMCHAN ETCHED SLICE 249g NR!!!")
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Time left: |
(9/9/2008 6:30:00 PM) |
Seller: |
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Bids: |
18 |
meteorock |
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Current Bid: |
USD 234.5 |
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Meteorite Name: Seymchan
Country: Russia, Magadan district
Coordinates: 62° 54' N / 152° 26' E
Date of find: 1967
Type: IIE or Pallasite
TKW: 312.3 kg in 1967 and more than 100 kg in 2004.
Pallasite which long time was considered as coarse octahedrite.
A mass too large to move was discovered by the geologist F. A. Mednikov during field work in June 1967. It was situated in the stream bed of a small unnamed tributary of the Yasachnaya River which itself is a left tributary of the Kolyma River. While the locality has the approximate coordinates given above, the mass was named after the town of Seymchan, situated about 150 km southeast of the locality of discovery.An expedition was sent to examine the locality and recover the meteorite. This turned out to be a roughly triangular prism, measuring 60 x 45 x 40 cm with pronounced regmaglypts and an estimated weight of 300 kg. (According to a note in Meteoritical Bulletin, No. 43, 1968: 272.3 kg). The river bed and the adjacent slopes were searched with a mine detector with the result that another fragment, of 51 kg, was discovered about 20 m downstream from the first find.
No analytical or structural work has yet been reported. The large mass is in the Academy of Sciences, Moscow, the small one, in the Museum of the Northeastern Geological Survey (in Magadan). The information above is from a report by Tsvetkov (1969; in Russian).[J.T. Wasson (personal communication 1974): Group IIE with about 9.15% Ni, 24.6 ppmGa,68.3 ppm Ge and 0.55 ppm Ir]. (By Vagn. F. Buchwald)
Last 2 years there were some expeditions to this remote place and some hundreds kgs of this meteorite have been collected.
At sawing up of a meteorite it was found out, that its structure includes a plenty of grains olivine, that allows to assume, that Seymchan can be abnormal pallasite. Some samples are strongly enriched olivine, some samples are deprived it absolutely.Others have the structure similar to structure of mesosiderite meteorites. On the polished and pickled metal surfaces it is well visible widmanstetten structure. Unlike some other meteorites, Seymchan is very stable and does not rust at correct storage. Samples of this meteorite will be a worthy ornament of any collection.
The nice two sides polished slice with olivine and etched metal! The weight is 249g. The size of the sample is 65х59х10mm. Shipping cost is $5 (worldwide).
We combined shipping. Total is the s/h with minimal value!
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Payment
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