Akyumak meteorite, Akyumak village, Ağri Province, Eastern Anatolia Region, Turkeyi
| Regional Level Types | |
|---|---|
| Akyumak meteorite | Meteorite Fall Location |
| Akyumak village | Village |
| Ağri Province | Province |
| Eastern Anatolia Region | Region |
| Turkey | Country |
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Key
Latitude & Longitude (WGS84):
39° 55' North , 42° 49' East
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Iron meteorite, Octahedrite (IVA, Om)
Fall, 2 August 1981; 50 kg
Bright greenish lights and detonations accompanied the fall of the Akyumak meteorite just before it plunged into the ground creating a 50 cm diameter, 90 cm deep hole. The surface of the meteorite displays the normal combination of pits and regmaglypts occasioned by its fiery entry into the atmosphere. Small samples made available for study reveal a well-developed Widmanstätten pattern dominated by kamacite, taenite, and plessite. Plentiful Neumann bands indicative of either pre-terrestrial or entry shock are present. Finger plessite is often rimmed by taenite bands. Other phases were quite sparse in the available specimens— only daubréelite is mentioned in the early 1988 report. In a later metallurgical study, cohenite was also detected.
Akyumak is the latest and largest of the 4 witnessed IVA iron falls. The largest remnant mass (18 kg) is with the Department of Geology, University of Elâzig. It is possible that the Turkish literature has additional information, but these postings often lack English abstracts.
Select Mineral List Type
Standard Detailed Strunz Dana Chemical ElementsMineral List
4 valid minerals.
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 DiagramDetailed Mineral List:
| ⓘ Cohenite Formula: Fe3C Description: Cohenite is labelled 'cementite' in the metallurgical literature. Reference: Aksoy, I., Ceylan, M. & Kayali, N. (1996) Phase investigation of an iron meteorite from Akyumak. J. Mater. Process. Technol. 57 (3 - 4): 221 - 224 (Feb 1996) |
| ⓘ Daubréelite Formula: Fe2+Cr3+2S4 Description: Embedded in kamacite in Colakoglu & Ceylan (1988) photograph Reference: Colakoglu, K. & Ceylan, M. (1988) An iron meteorite from Akyumak: Meteoritics 23 (4): 371-372 (Dec 1988) |
| ⓘ Iron Formula: Fe Description: Composition is nearly uniform 5.8 % Ni except at kamacite-taenite interfaces. Reference: Colakoglu, K. & Ceylan, M. (1988) An iron meteorite from Akyumak: Meteoritics 23 (4): 371-372 (Dec 1988); Aksoy, I., Ceylan, M. & Kayali, N. (1996) Phase investigation of an iron meteorite from Akyumak. J. Mater. Process. Technol. 57 (3 - 4): 221 - 224 (Feb 1996) |
| ⓘ Iron var: Kamacite Formula: (Fe,Ni) Description: Composition is nearly uniform 5.8 % Ni except at kamacite-taenite interfaces. Reference: Colakoglu, K. & Ceylan, M. (1988) An iron meteorite from Akyumak: Meteoritics 23 (4): 371-372 (Dec 1988); Aksoy, I., Ceylan, M. & Kayali, N. (1996) Phase investigation of an iron meteorite from Akyumak. J. Mater. Process. Technol. 57 (3 - 4): 221 - 224 (Feb 1996) |
| ⓘ 'Plessite' Reference: Colakoglu, K. & Ceylan, M. (1988) An iron meteorite from Akyumak: Meteoritics 23 (4): 371-372 (Dec 1988); Aksoy, I., Ceylan, M. & Kayali, N. (1996) Phase investigation of an iron meteorite from Akyumak. J. Mater. Process. Technol. 57 (3 - 4): 221 - 224 (Feb 1996) |
| ⓘ Taenite Formula: (Fe,Ni) Description: Taenite - Highest Ni content (~40%) at kamacite-taenite interfaces. Reference: Colakoglu, K. & Ceylan, M. (1988) An iron meteorite from Akyumak: Meteoritics 23 (4): 371-372 (Dec 1988); Aksoy, I., Ceylan, M. & Kayali, N. (1996) Phase investigation of an iron meteorite from Akyumak. J. Mater. Process. Technol. 57 (3 - 4): 221 - 224 (Feb 1996) |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Cohenite | 1.BA.05 | Fe3C |
| ⓘ | Iron | 1.AE.05 | Fe |
| ⓘ | var: Kamacite | 1.AE.05 | (Fe,Ni) |
| ⓘ | Taenite | 1.AE.10 | (Fe,Ni) |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Daubréelite | 2.DA.05 | Fe2+Cr3+2S4 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Plessite' | - | |
List of minerals arranged by Dana 8th Edition classification
| Group 1 - NATIVE ELEMENTS AND ALLOYS | |||
|---|---|---|---|
| Metals, other than the Platinum Group | |||
| ⓘ | Cohenite | 1.1.16.1 | Fe3C |
| ⓘ | Iron var: Kamacite | 1.1.11.1 | (Fe,Ni) |
| ⓘ | Taenite | 1.1.11.2 | (Fe,Ni) |
| Group 2 - SULFIDES | |||
| AmBnXp, with (m+n):p = 3:4 | |||
| ⓘ | Daubréelite | 2.10.1.11 | Fe2+Cr3+2S4 |
| Unclassified Minerals, Mixtures, etc. | |||
| ⓘ | Iron | - | Fe |
| ⓘ | 'Plessite' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Cohenite | Fe3C |
| S | Sulfur | |
| S | ⓘ Daubréelite | Fe2+Cr23+S4 |
| Cr | Chromium | |
| Cr | ⓘ Daubréelite | Fe2+Cr23+S4 |
| Fe | Iron | |
| Fe | ⓘ Daubréelite | Fe2+Cr23+S4 |
| Fe | ⓘ Iron (var: Kamacite) | (Fe,Ni) |
| Fe | ⓘ Taenite | (Fe,Ni) |
| Fe | ⓘ Cohenite | Fe3C |
| Fe | ⓘ Iron | Fe |
| Ni | Nickel | |
| Ni | ⓘ Iron (var: Kamacite) | (Fe,Ni) |
| Ni | ⓘ Taenite | (Fe,Ni) |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Colakoglu, K., Ceylan, M. (1988) An iron meteorite from Akyumak. Meteoritics, 23(4), 371-372 (Dec 1988).
Graham, A.L. [Ed.] (1990) Meteoritical Bulletin. Meteoritics, 25(1), 59-70 (March 1990).
Aksoy, I., Ceylan, M., Kayali, N. (1996) Phase investigation of an iron meteorite from Akyumak. Journal of Materials Processing Technology, 57(3-4), 221-224 (Feb 1996).
Grady, M.M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
External Links
http://www.lpi.usra.edu/meteor/metbull.php = Meteoritical Bulletin Database
https://www.lpi.usra.edu/meteor/metbull.php?code=433
http://www.encyclopedia-of-meteorites.com/test/Akyumak_don_edwards.JPG
https://www.lpi.usra.edu/meteor/metbull.php?code=433
http://www.encyclopedia-of-meteorites.com/test/Akyumak_don_edwards.JPG
Other Regions, Features and Areas containg this locality
AsiaContinent
Eurasian PlateTectonic Plate
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