Meteorite Turgut (Turkey, 1999) - Ungrouped Iron, Finest Octahedrite

Description

TURGUT
Turgut
Found 1999, turkey
Iron meteorite
Ungrouped
Specimen is a 2.47g slice
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Turgut
Basic information
Name:
Turgut
This is an OFFICIAL meteorite name.
Abbreviation:
There is no official abbreviation for this meteorite.
Observed fall:
No
Year found:
1999
Country:
Turkey
Mass:
152 kg
Classification
history:
Meteoritical Bulletin:
MB 103
(2014)
Iron, ungrouped
Recommended:
Iron, ungrouped
Comments:
Approved 6 Jun 2014
Writeup
Writeup from
MB 103:
Turgut
38°37.0163’N, 32°0.0962’E
Konya, Turkey
Found: April 1999
Classification: Iron meteorite (ungrouped)
History
: A 152 kg piece of iron was discovered by Mr. Cemil Gunay in April 1999, while he was plowing a field. The specimen was 30 cm deep. Mr. Gunay took the specimen to his home where he attempted to cut it. He applied rust-proofing spray. It was then kept outside in a hot and dry environment in his garden for approximately 10 years, when the existence of the specimen was noted by Turkish meteorite collector Mesut Kasikci (a resident of France), who then informed academic research institutions about the find. The specimen was brought by Mesut Kasikci to Dr. Catherine Caillet Komorowski of the
MNHNP
.
Physical characteristics
: The specimen measures approximately 40 × 60 × 25 cm and has a sculpted appearance, with large irregular cavities on one side and smooth regmaglypts on the other. Weathering is minimal.
Petrography
: (C. Caillet Komorowski,
MNHNP
): SEM investigation reveals a well-developed Widmanstätten pattern consistent with a finest octahedrite. Plessite is common. Fractured schreibersite grains are present and represent about 1.3% of the mode. Sulfide, silicate, or graphite inclusions are absent. No tetrataenite was found, also confirmed by magnetic properties (P. Rochette,
CEREGE
). Lack of Neumann lines indicates relatively low shock. Electron microprobe analyses indicate that schreibersite contains high Ni (about 31.5 wt%). Kamacite contains 7.4-6.5 wt% Ni.
Geochemistry
: Bulk composition: INAA data (J. Duke and C. Herd,
UAb
): Ni = 9.04±0.07 wt%, Co = 0.420±0.003 wt%; Ir = 2.15±0.03, Au = 0.434±0.009; Ga <0.8; As = 2.37±0.09; W = 1.03±0.04; Re = 0.17±0.01; Cr <15; Cu <21; Ge <60 (all μg/g). Magnetic Properties (P. Rochette,
CEREGE
): results indicate the absence of tetrataenite.
Classification
: (C. Herd,
UAb
): Ungrouped, finest octahedrite. Ga content is too low for most irons with the exception of the IVA and IVB groups. However, Au is too low for IVA, and Ni is too low for IVB.
Specimens
: Type specimen of 1626 g total at
MNHNP
consists of 1231 g and 394.8 g specimens, and a polished section. A 2.4 g specimen, used for INAA, and a 24.4 g specimen are at
UAb
. A 350 g specimen is at Istanbul Turkish University (Mehmet Özel). Main mass (140 kg) with finder; 9 kg specimen with Mesut Kasikci.
Data from:
MB103
Table 0
Line 0:
State/Prov/County:
Konya
Date:
April 1999
Latitude:
38°37.0163'N
Longitude:
32°0.0962'E
Mass (g):
152000
Pieces:
1
Class:
Iron, ungrouped
Shock stage:
low
Weathering grade:
low
Classifier:
C. Caillet Komorowski, C. Herd
Type spec mass (g):
1626
Type spec location:
MNHNP
Main mass:
finder
Finder:
Cemil Gunay
Comments:
Submitted by C. Herd
Institutions
and collections
CEREGE
: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
MNHNP
: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France;
Website
(institutional address)
UAb
: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada;
Website
(institutional address; updated 17 Oct 2011)
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