11:45 AM - 12:00 PM
[HTT15-10] Research about production areas and distribution on the prehistoric pottery by isotope analysis : Consideration of isotope ratio by sequential leaching
Keywords:pottery, producing area, Sr-Nd-Pb isotope analysis
The location of prehistoric pottery production has been studied based on ceramic petrology such as characteristics of pottery type and pattern, mineral assemblages by microscopic observation, and elemental concentration analysis. We are proceeding with isotope analysis of pottery in order to obtain more reliable evidence for the locality estimation of pottery. We analyzed the production locality of a pottery group, called "Ikoma seirokusan" has a brown color characterized by amphibole-rich potter, using Sr (strontium) -Nd (neodymium) -Pb (lead) isotope analysis. It is thought that this pottery group was manufactured in villages in the western foot of Mt. Ikoma (Higashi-Osaka City, etc.) in the eastern part of the Osaka Plain and distributed in each area centered on the Kinki region.
As a result of previous analysis, the isotopic difference observed between the pottery from "Ikoma seirokusan" and "Hi-Ikoma seirokusan"(none Ikoma seirokusan pottery).The former's Sr-Nd isotope ratios was included in the range of the Ikoma gabbro's isotopic values. It is tentatively revealed that the isotope analysis is a useful indicator for estimating pottery production sites.
Sr-Nd isotope ratios of "Ikoma seirokusan" pottery was included in the range of the Ikoma gabbro's isotopic values, but there was a slight bias in the isotope values of pottery excavated between the eastern part of Osaka Plain on Mt. Ikoma's west side and the northeastern part of the Kyoto Basin on the west side of Mt. Hiei. In order to clarify what these differences indicate, we performed sequencial leaching and measured the isotope ratios of each leachate again.
As a result of the analysis, a slight difference in the isotope ratio was observed in the leaching step.
In this presentation, we will report the results and discuss the evaluation of isotope ratios in estimating the origin of clay in pottery.
As a result of previous analysis, the isotopic difference observed between the pottery from "Ikoma seirokusan" and "Hi-Ikoma seirokusan"(none Ikoma seirokusan pottery).The former's Sr-Nd isotope ratios was included in the range of the Ikoma gabbro's isotopic values. It is tentatively revealed that the isotope analysis is a useful indicator for estimating pottery production sites.
Sr-Nd isotope ratios of "Ikoma seirokusan" pottery was included in the range of the Ikoma gabbro's isotopic values, but there was a slight bias in the isotope values of pottery excavated between the eastern part of Osaka Plain on Mt. Ikoma's west side and the northeastern part of the Kyoto Basin on the west side of Mt. Hiei. In order to clarify what these differences indicate, we performed sequencial leaching and measured the isotope ratios of each leachate again.
As a result of the analysis, a slight difference in the isotope ratio was observed in the leaching step.
In this presentation, we will report the results and discuss the evaluation of isotope ratios in estimating the origin of clay in pottery.