最近10,000年間の噴火史編年と^<14>C年代測定(<特集>火山学50年間の発展と将来)

概要

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Volcanic stratigraphy and radiocarbon (^<14>C) dating have contributed in establishing the chronological framework of eruptive histories of Japanese volcanoes during the past 10,000 years. This paper presents an overview of ^<14>C dating as well as other dating methods used for eruptive products with emphasis on new technical aspects that were developed in the last decade. A number of eruptive ages of many volcanoes in Japan were determined by ^<14>C dating using accelerator mass spectrometry (AMS), which can measure very small samples i. e. 1mg of carbon. AMS is the most convenient method to use in dating paleosols which directly underlie tephra layers. The ^<14>C calibration curve and programs are widely available. The ^<14>C wiggle matching for single annual-ring is useful for high-accurate dating. Other methods such as fission-track dating, thermoluminescence dating, and paleomagnetic age determination are also applicable for the Holocene eruptive products. To establish and refine the high-resolution eruptive histories, the ^<14>C dating method and other dating methods must be examined in conjunction with detailed stratigraphy.
特定非営利活動法人日本火山学会の論文
2005-12-20