Identification and origin of bitumen in Neolithic artefacts from Demirkoy Hoyuk (8100 BC)
[ X ]
Tarih
2006
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Two ring-like artefacts from the aceramic Neolithic site of Demirkoy Hoyuk in southeastern Turkey were analysed using geochemical techniques in order to determine whether they were prepared using a bitumen amalgam or not. The artefacts, dated 8 100 BC, are early evidence of the innovative use of a petroleum-based material to prepare pieces of ornaments (beads, rings, etc.) for the elite of a Neolithic settlement. In order to trace the source of the presumed bitumen, two oil seeps, Bogazkoy and Yesilli, were sampled. To complete the genetic references, geochemical data on crude oils from the main oil fields from the area were compiled. Basic geochemical data show that bitumen is present in the artefacts. Sterane and terpane patterns, as well as carbon isotopic data on C15+ saturated and C15+ aromatic hydrocarbons, allowed us to conclude that the Demirkoy Hoyuk bitumen and the Bogazkoy oil seep were generated from a Silurian source rock. The detailed geochemical characteristics show, however, that the Demirkoy Hoyuk bitumen does not correlate perfectly with the Bogazkoy oil. This discrepancy suggests several explanations: the real bitumen source may be elsewhere in the vicinity and has not been discovered or was at the Bogazkoy oil seep location but with slightly different properties in Neolithic times, or has disappeared. Another possibility is that the slight molecular differences are due to weathering effects, which affected the pristine bitumen within the archaeological sample. (c) 2006 Elsevier Ltd. All rights reserved.
Açıklama
22nd International Meeting on Organic Geochemistry -- SEP 12-16, 2005 -- Seville, SPAIN
Anahtar Kelimeler
[No Keyword]
Kaynak
Organic Geochemistry
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
37
Sayı
12
