Provenance of granitic anchor stones recovered from the Takashima submerged site: an approach using the CHIME method for dating of zircons
スポンサーリンク
概要
- 論文の詳細を見る
Wooden anchors equipped with a pair of granitic anchor stones were found and recovered form a number of submerged wrecks located in Imari Bay of Takashima, Nagasaki Prefecture. These remains are from wrecked Mongolian warships that were involved in the second Mongol invasion of 1281. All the granitic anchor stones from different anchors are alkali granite, consisting mainly of microcline-micro-perthite and quartz with trace amounts of biotite and plagioclase. The CHIME (chemical Th-U-total Pb isochron method) age determination was carried out on zircons from the recovered granitic anchor stones to try to identify the original source area for the anchor stones. The CHIME zircon ages for 3 anchor stones from different anchors are 110±1Ma, 108±3Ma and 108±2Ma. The ages together with the Sr-poor nature of the bulk chemistry suggest that the anchor stones were derived from a leucocratic alkali granite body found close to Quanzhou, southeastern China. This result implies that the wrecked warships were constructed in Quanzhou and supports the view that the Moslem traders in Quanzhou contributed significantly to the second Mongol invasion by providing ships and seamen.
- 日本学士院の論文
著者
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Suzuki Kazuhiro
Nagoya University
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KARAKIDA Yoshifumi
Emeritus Professor of Seinan-gakuin University
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KAMADA Yasuhiko
Nagasaki University
関連論文
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- Radiometric ages and Nd-Sr isotopic compositions of felsic plutonic rocks from the Ulleungdo volcanic island, South Korea(Proceedings of the 19^ Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part
- Radiometric ages and Nd-Sr isotopic compositions of felsic plutonic rocks from the Ulleungdo volcanic island, South Korea(Proceedings of the 19^ Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part
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- Provenance of granitic anchor stones recovered from the Takashima submerged site: an approach using the CHIME method for dating of zircons
- Significance of c. 300 Ma CHIME zircon age for post-tectonic granite from the Hercynian suture zone, Bamian, Afghanistan