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Basic information Name: Gerdekkaya
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2018
Country: Turkey
Mass:help 68 kg
Meteoritical Bulletin:  MB 108  (2020)  Iron, IAB-sLL
Recommended:  Iron, IAB-sLL    [explanation]

This is 1 of 35 approved meteorites classified as Iron, IAB-sLL.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 21 Nov 2019
Writeup from MB 108:

Gerdekkaya        40.130°N, 35.056°E

Corum, Turkey

Find: 28 Apr 2018

Classification: Iron meteorite (IAB-sLL)

History: The meteorite was found by people clearing rocks from a field that was being plowed to get ready for planting. Because this rock was so heavy, the two discoverers realized that they probably had a meteorite and notified Cevdet Erdogan, a relative in the USA who provided the type specimen.

Physical characteristics: Edges weathered, metal and silicates relatively fresh.

Petrography: Petrographic description. Sample is not well polished nor etched. Inclusions that are mixes of FeS and silicates are common on each of the four faces examined on this small (ca. 2 cm) block. These inclusions consist of disorganized mixes of silicates and FeS. Impact cannot be reuled out, but terrestrial heating is suspected. Kamacite boundaries are present, but no organized octahedral structure was recognized. The degree of terrestrial oxidation is minor to moderate.

Geochemistry: Metal composition (based on one INAA): Co, 4.88 mg/g; Ni, 76 mg/g; Ga, 70.0 μg/g; As, 15.3 μg/g; W, 0.80 μg/g; Ir 2.90 μg/g; Au, 1.63 μg/g. The silicates are typical for IAB-sLL; most are low-Ca pyroxenes with a mean composition of 5.6 mol%Fs, 1.2 mol% An.

Classification: The meteorite is a member of IAB-sLL. It has several close relatives with similar Ir. Co, Ni and Au including Nova 058, Comanche (iron), Kaalijarv and Pine River.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Gerdekkaya Koyu
Date:28 Apr 2018
Mass (g):68 kg
Class:Iron, IAB-sLL
Classifier:J T Wasson
Type spec mass (g):109
Type spec location:UCLA
Main mass:R. Erdogan and M. Yilmaz, Gerdekkaya, Alaca, Corum, Turkey
Finder:Mutlu Yilmaz and Revdet Erdogan
Comments:Submitted by J. T. Wasson, Galip Galip
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     Recommended::   (40° 7' 48"N, 35° 3' 22"E)

     This is the only approved meteorite from Corum, Turkey
     This is 1 of 26 approved meteorites from Turkey (plus 4 unapproved names)
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