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AMS 14C Dating Using Black Pottery and Fiber Pottery

Published online by Cambridge University Press:  18 July 2016

Shozo Mihara*
Affiliation:
Graduate School of Social and Cultural Studies, Kyushu University, 4-2-1, Ropponmatsu, Chuo-ku, Fukuoka, Japan.
Kazuo Miyamoto
Affiliation:
Faculty of Humanities, Kyushu University, 6-19-1, Hakozaki, Higashi-ku, Fukuoka, Japan.
Hidefumi Ogawa
Affiliation:
Dept. of Philippine Studies, Tokyo University of Foreign Studies, 3-11-1, Asahi-machi, Fuchu, Tokyo, Japan.
Teiji Kurosaka
Affiliation:
Saitama Cultural Deposits Research Corporation, 4-4-1, Funakidai, Ohzato, Saitama, Japan.
Toshio Nakamura
Affiliation:
Dating and Materials Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602 Japan.
Hiroko Koike
Affiliation:
Graduate School of Social and Cultural Studies, Kyushu University, 4-2-1, Ropponmatsu, Chuo-ku, Fukuoka, Japan.
*
Corresponding author. Email: cs200027@scs.kyushu-u.ac.jp.
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Abstract

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A technique of accelerator mass spectrometry (AMS) has made it possible to directly measure radiocarbon ages of pottery by isolating organic materials sealed in the pottery when the pottery was formed. We analyzed the carbon contents and 14C ages for “black pottery” from the Philippines and “fiber pottery” from Japan using the relevant carbonaceous materials extracted from the pottery samples, i.e., adhered chaff or grass fibers that were incorporated in the pottery matrix, respectively. The carbon yield of the pottery sample varied largely depending on the pottery types, the preservation conditions, as well as the chemical pretreatment methods to purify carbonaceous materials for 14C dating. We will discuss criteria for sample selection of well-preserved pottery, and a modified method, instead of the standard alkali treatment, to obtain sufficient material for precise 14C dating.

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