HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Medicine / Faculty of Medicine >
Peer-reviewed Journal Articles, etc >

A systematic comparison of obsidian hydration measurements : The first application of micro-image with secondary ion mass spectrometry to the prehistoric obsidian

This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Files in This Item:
QUATINT_2018_96_Revision 1_V0.pdf7.04 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/83796

Title: A systematic comparison of obsidian hydration measurements : The first application of micro-image with secondary ion mass spectrometry to the prehistoric obsidian
Authors: Nakazawa, Yuichi Browse this author →KAKEN DB
Kobayashi, Sachio Browse this author
Yurimoto, Hisayoshi Browse this author →KAKEN DB
Akai, Fumito Browse this author
Nomura, Hidehiko Browse this author
Keywords: Obsidian
Hydration
Measurement
Secondary ion mass spectrometry
Micro-imaging
Issue Date: 10-Jan-2020
Publisher: Elsevier
Journal Title: Quaternary international
Volume: 535
Start Page: 3
End Page: 12
Publisher DOI: 10.1016/j.quaint.2018.05.039
Abstract: Archaeologists have long used obsidian hydration dating method to give chronometric dates for obsidian artifacts. Models using these equations independently employ different measurement systems, which are based on rim thicknesses determined by optical microscope and hydrogen depths measured by secondary ion mass spectrometry (SIMS), respectively, although the inconsistency of both measurements has been reported. Firstly, this paper describes a systematic comparison that was done on optical rim thicknesses and hydrogen depths by means of an isotope microscope, which provides micro-imaging with SIMS. Depth profiles of hydrogen were precisely obtained from the spots where optical measurements were taken on the archaeological obsidian flakes from two distinctive cultural horizons (older: Upper Paleolithic, younger: Initial Jomon) in the stratified open-air site of Jozuka in southern Kyushu (Japan). Secondarily, using the measurements of hydrogen depths that are the most consistent to the measurements of optical thicknesses, the estimated hydration rate of the Holocene (Initial Jomon) is slower than that of the Late Pleistocene (Upper Paleolithic), implying that the difference in hydration rates was due to the difference of intrinsic water content of obsidian and/or obsidian geochemistry. An application of micro-imaging with SIMS to measure hydrogen depths on obsidian shows promise as a tool for improving the practice of hydration dating and evaluating local climatic condition.
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/83796
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中澤 祐一

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 

 - Hokkaido University