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Coral geochemical signals and growth responses to coseismic uplift during the great Sumatran megathrust earthquakes of 2004 and 2005
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| Title: | Coral geochemical signals and growth responses to coseismic uplift during the great Sumatran megathrust earthquakes of 2004 and 2005 |
| Authors: | Ito, Saori Browse this author | | Yamazaki, Atsuko Browse this author | | Nishimura, Yuichi Browse this author | | Yulianto, Eko Browse this author | | Watanabe, Tsuyoshi Browse this author →KAKEN DB |
| Keywords: | Coral | | Carbon and oxygen isotopes | | Trace elements | | Skeletal growth | | Coseismic uplift | | Tsunami | | Sumatra earthquake |
| Issue Date: | 15-Mar-2020 |
| Publisher: | Elsevier |
| Journal Title: | Geochimica et cosmochimica acta |
| Volume: | 273 |
| Start Page: | 257 |
| End Page: | 274 |
| Publisher DOI: | 10.1016/j.gca.2020.01.037 |
| Abstract: | The annual banded skeletons of reef corals potentially record past earthquakes events. We examined cores of five living Porites coral heads in Simeulue Island, Indonesia, near the epicenter of the 2004 Sumatra-Andaman and the 2005 Nias-Simeulue earthquakes. These sites showed 0.4-1.4 m of uplift. We measured skeletal strontium, magnesium, and calcium; carbon and oxygen isotopic ratios; and skeletal density, extension, and calcification rates, from 1994 to 2010. Coral geochemistry fluctuates more than are expected from strictly environmental causes; however, stress bands, reduced growth rates, and changed skeletal delta C-13 appear to reflect the tsunami and seismic uplift (the step change in skeletal delta C-13 results equated to 0.31 +/- 0.10 parts per thousand/m in response to the 2004 uplift and 0.23 +/- 0.03 parts per thousand/m to the 2005 uplift). (C) 2020 Elsevier Ltd. All rights reserved. |
| Rights: | ©2020. 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/2115/84393 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 渡邊 剛
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