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Determination of 14C in Volcanic Gas By Accelerator Mass Spectrometry

Published online by Cambridge University Press:  18 July 2016

Hideki Yoshikawa ,
Hiromichi Nakahara ,
Mineo Imamura ,
Kouichi Kobayashi  and
Takashi Nakanishi
Hideki Yoshikawa*
Affiliation:
Kanazawa University. Kadoma-machi, Kanazawa, Ishikawa 920–1192, Japan
Hiromichi Nakahara
Affiliation:
Tokyo Metropolitan University, 1–1 Minami-Ohsawa, Hachioji, Tokyo 192–0397, Japan
Mineo Imamura
Affiliation:
National Museum of Japanese History, 117 Jonai-cho, Sakura, Chiba 285–8502, Japan
Kouichi Kobayashi
Affiliation:
Tokyo University, Hongo, Bunkyo-ku, Tokyo 113–8654, Japan
Takashi Nakanishi
Affiliation:
Kanazawa University. Kadoma-machi, Kanazawa, Ishikawa 920–1192, Japan
*
Corresponding author. Email: [email protected].
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Abstract

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Radioactive nuclides such as radiocarbon can be good tracers for investigating the circulation of underground carbon and water. Volcanic gas can be sampled reliably for 14C analysis and prepared for analysis by accelerator mass spectrometry (AMS). In this paper, we establish a method for the measurement of 14C in volcanic gas, and measure the amounts of 14C in various volcanic gases. Samples of fumarolic gas from some Japanese volcanoes were found to contain 0.5 to 4.2 pMC, while those from White Island in New Zealand contained 2.6 pMC. Dissolved gas from Lake Nyos, Cameroon, contained 0.4 to 4.8 pMC. The data indicate a mixing process between surface carbon and deep carbon.

Type
Articles
Information
Radiocarbon , Volume 47 , Issue 2 , 2005 , pp. 211 - 219
Copyright
Copyright © 2005 by the Arizona Board of Regents on behalf of the University of Arizona 

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