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Seymchan meteorite (Seimchan meteorite), Magadanskaya Oblast, Russia

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Latitude & Longitude (WGS84): 62° 53' 59'' North , 152° 25' 59'' East
Latitude & Longitude (decimal): 62.90000,152.43333
GeoHash:G#: z7hmudwe4
Locality type:Meteorite Fall Location
Meteorite Class:PMG pallasite meteorite
Meteoritical Society Class:Pallasite, PMG
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Dfc : Subarctic climate

Pallasite, Main Group (PMG)
Found in 1967, 323.3 kg

The larger specimen has been found in June 1967 by the geologist F. A. Mednikov during a geological survey. The meteorite hardly seen was lying among the stones of a brook-bed, affluent of the River Hekandue (a left tributary of River Yasachnaya). The smaller specimen was found at a distance of 20 m from the first one by I. H. Markov with a mine detector in October 1967. The main mass was turned to the Academy of Sciences of the USSR.

Regions containing this locality

Soviet Union (1922-1991)

Country (Former) - 3,733 mineral species & varietal names listed

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Standard Detailed Strunz Dana Chemical Elements

Mineral List

6 valid minerals. 1 erroneous literature entry.

Meteorite/Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Formula: Fe2+Cr3+2O4
Formula: Mg2SiO4
Reference: P.M. Kartashov data; Solferino, G. F., Golabek, G. J., Nimmo, F., & Schmidt, M. W. (2015). Fast grain growth of olivine in liquid Fe–S and the formation of pallasites with rounded olivine grains. Geochimica et Cosmochimica Acta, 162, 259-275.
Formula: Fe
Reference: Meteoritical Bulletin
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Meteoritical Bulletin
Formula: MgCr2O4
Reference: Pavel M. Kartashov analytical data (2008)
'PMG pallasite meteorite'
Reference: Meteoritical Society Database
Formula: (Fe,Ni)3P
Reference: P.M. Kartashov data
Formula: FeNi
Reference: Yang, J., Goldstein, J.I. & Scott, E. R. D. (2010) Main-group pallasites: Thermal history, relationship to IIIA irons and origin. Geochimica et Cosmochimica Acta 74:4471-4492.
Formula: FeS
Reference: Meteoritical Bulletin; Solferino, G. F., Golabek, G. J., Nimmo, F., & Schmidt, M. W. (2015). Fast grain growth of olivine in liquid Fe–S and the formation of pallasites with rounded olivine grains. Geochimica et Cosmochimica Acta, 162, 259-275.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
var: Kamacite1.AE.05(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
'Chromite' ?4.BB.05Fe2+Cr3+2O4
Group 9 - Silicates
Unclassified Minerals, Rocks, etc.
PMG pallasite meteorite-

List of minerals arranged by Dana 8th Edition classification

Metals, other than the Platinum Group
var: Kamacite,Ni)
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Chromite ?
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Unclassified Minerals, Rocks, etc.
'PMG pallasite meteorite'-

List of minerals for each chemical element

O ChromiteFe2+Cr23+O4
O ForsteriteMg2SiO4
O MagnesiochromiteMgCr2O4
Mg ForsteriteMg2SiO4
Mg MagnesiochromiteMgCr2O4
Si ForsteriteMg2SiO4
P Schreibersite(Fe,Ni)3P
S TroiliteFeS
Cr ChromiteFe2+Cr23+O4
Cr MagnesiochromiteMgCr2O4
Fe ChromiteFe2+Cr23+O4
Fe IronFe
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Schreibersite(Fe,Ni)3P
Fe TetrataeniteFeNi
Fe TroiliteFeS
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Schreibersite(Fe,Ni)3P
Ni TetrataeniteFeNi

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

0 - 2.588 Ma

ID: 3188314
Cenozoic sedimentary rocks

Age: Pleistocene (0 - 2.588 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

2.588 - 23.03 Ma

ID: 627725
Sedimentary; Clastic: deltaic and nearshore

Age: Neogene (2.588 - 23.03 Ma)

Description: Verkhoyansk-Kolyma region, Yana-Kolyma fold-thrust belt, western Okhotsk-Chukhotsk volcanic belt

Comments: Orogen, magmatic arc/suite; Petrov et al., unpublished compilation, 2007-08

Lithology: Sandstone, siltstone, shale, coal; plant fossils;

Reference: J.C. Harrison, M.R. St-Onge, O.V. Petrov, S.I. Strelnikov, B.G. Lopatin, F.H. Wilson, S. Tella, D. Paul, T. Lynds, S.P. Shokalsky, C.K. Hults, S. Bergman, H.F. Jepsen, and A. Solli. Geological map of the Arctic. doi:10.4095/287868. Geological Survey of Canada Map 2159A. [2]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Report of geologist F. A. Mednikov (Magadan, USSR) in a letter, VIII 15, 1967 and of V. I. Zvetkov (Moscow, USSR) in a letter, X 17, 1967.
Meteoritics, 5, 97.
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
Yang, J., Goldstein, J.I. & Scott, E. R. D. (2010) Main-group pallasites: Thermal history, relationship to IIIA irons and origin. Geochimica et Cosmochimica Acta 74:4471-4492.

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