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Orotukan
Basic information Name: Orotukan
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Russia
Mass:help 555 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Iron, ungrouped
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 152 approved meteorites (plus 1 unapproved name) classified as Iron, ungrouped.   [show all]
Search for other: Iron meteorites, Metal-rich meteorites, and Ungrouped irons
Comments: Approved 20 Dec 2022
Writeuphelp
Writeup from MB 111:

Orotukan        62°9’8" N, 151°16’15" E

Magadanskaya oblast’, Russia

Find: Aug 2022

Classification: Iron meteorite (ungrouped)

History: The meteorite was found at the foot of the left slope of the river valley of the downstream of the Strelka Creek, the left tributary of the Orotukan River.

Petrography: (Ksenia A. Konovalova, FMMR). Medium-grained octahedrite having a well-developed Widmanstätten pattern with 0.7-1.1 mm kamacite bands. Thin lamellae of taenite in kamacite have sizes up to 70 µm. Large schreibersite coarse grained inclusion (1-2 mm) is occured.

Geochemistry: Mineral composition and Geochemistry: EDS analyses (Atali Agakhanov, Ksenia Konovalova, FMMR). Kamacite (in wt. % n = 2) : Fe - 89.45, Ni - 7.6, Co - 0.74, taenite (in wt. %, n = 7): Fe - 62.07, Ni - 35.2, Co - 0.37, schreibersite (in wt.%, n=6): Fe - 44.88, Ni - 38.04, Co - 0.24, P - 14.49. Bulk composition of the meteorite (ICP-MS, V.K. Karandashev, IPTM RAS):Ni = 8.61; Co = 0.45 (both in wt%);Cr =154, Cu = 127, Ga = 39.4, Ge = 54.9, Mo = 17.2, Ru = 23.6, Rh = 3.3 Pd = 3.7, W = 2.5, Re = 1.5, Os = 20.2, Ir = 13.3, Pt = 26.1, Au = 0.82 (all in µg/g). 

Classification: (Kseniya A. Konovalova, FMMR). Iron, Ungrouped. Based on Ga, Ge content iron is reminiscent IAB and IID meteorites. Ni (8.61 wt.%) and Co (0.45 wt.%) as similar to IAB complex group, Au (0.82 µg/g) is lower than that of IAB irons, and Ge (54.9 µg/g) is lower than that of IID, irons so this sample is ungrouped.

Specimens: ZOLOTOY IRIS LLC (Magadan, Russia) holds main mass, 51 g - FMMR

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Magadanskaya oblast'
Date:Aug 2022
Latitude:62°9'8" N
Longitude:151°16'15" E
Mass (g):555 kg
Pieces:1
Class:Iron, ungrouped
Classifier:Ksenia A. Konovalova, FMMR
Type spec mass (g):51
Type spec location:FMMR
Main mass:ZOLOTOY IRIS LLC (Magadan, Russia)
Finder:ZOLOTOY IRIS LLC (Magadan, Russia)
Comments:Field name is FN791; submitted by Ksenia A. Konovalova, [email protected]
Institutions
   and collections
FMMR: Fersman Mineralogical Museum, Leninskiy prospekt 18 korpus 2, Moscow, Russia, 119071, Russia; Website (institutional address; updated 24 Feb 2018)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:

Russia
Coordinates:
     Recommended::   (62° 9' 8"N, 151° 16' 15"E)

Statistics:
     This is 1 of 6 approved meteorites from Magadanskaya oblast', Russia
     This is 1 of 156 approved meteorites from Russia (plus 5 unapproved names) (plus 19 impact craters)
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