Hostname: page-component-76d6cb85b7-xh428 Total loading time: 0 Render date: 2026-07-12T11:10:31.411Z Has data issue: false hasContentIssue false

Marine reservoir correction for the Pacific coast of central Japan using 14C ages of marine mollusks uplifted during historical earthquakes

Published online by Cambridge University Press:  20 January 2017

Masanobu Shishikura*
Affiliation:
Active Fault Research Center, Geological Survey of Japan/AIST, SiteC7 1-1-1 Higashi, Tsukuba, 305-8567, Japan
Tomoo Echigo
Affiliation:
Department of Geography, University of Tokyo; Research Fellow of the Japan Society for the Promotion of Science, Japan
Heitaro Kaneda
Affiliation:
Active Fault Research Center, Geological Survey of Japan/AIST, SiteC7 1-1-1 Higashi, Tsukuba, 305-8567, Japan
*
Corresponding author. Fax: +81 29 861 3803. E-mail address:m.shishikura@aist.go.jp (M. Shishikura).

Abstract

In this study we utilize marine shell samples from two levels of historically uplifted sessile mollusk assemblages and raised wave-cut benches to evaluate the marine reservoir correction (ΔR) for the Pacific coast of central Japan. Elevation measurements of the uplifted marine shells indicate that the lower assemblage emerged during the 1923 Taisho Kanto earthquake (M7.9), whereas uplift of the upper assemblage is most likely but less confidently ascribed to the 1703 Genroku Kanto earthquake (M8.2). Radiocarbon dating of carefully selected samples from the upper and lower assemblages yielded very similar ΔR values of 82 ± 33 and 77 ± 32 yr, respectively. We regard the former ΔR value as a representative and more reliable value given the uncertainty in correlation of the upper assemblage with the 1703 earthquake. This result is consistent with previously reported ΔR values for the Pacific coast of south-central Japan and areas around the Sea of Japan that are influenced by warm ocean currents. Radiocarbon dating of coseismically uplifted shells can aid in estimating marine reservoir ages in the tectonically active Japan Islands.

Information

Type
Research Article
Copyright
University of Washington

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable