Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relics
Abstract Paleomagnetic information reconstructed from archeological materials can be utilized to estimate the archeological age of excavated relics, in addition to revealing the geomagnetic secular variation and core dynamics. The direction and intensity of the Earth’s magnetic field (archeodirectio...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-05-01
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| Series: | Earth, Planets and Space |
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| Online Access: | http://link.springer.com/article/10.1186/s40623-018-0841-5 |
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| author | Yu Kitahara Yuhji Yamamoto Masao Ohno Yoshihiro Kuwahara Shuichi Kameda Tadahiro Hatakeyama |
| author_facet | Yu Kitahara Yuhji Yamamoto Masao Ohno Yoshihiro Kuwahara Shuichi Kameda Tadahiro Hatakeyama |
| author_sort | Yu Kitahara |
| collection | DOAJ |
| description | Abstract Paleomagnetic information reconstructed from archeological materials can be utilized to estimate the archeological age of excavated relics, in addition to revealing the geomagnetic secular variation and core dynamics. The direction and intensity of the Earth’s magnetic field (archeodirection and archeointensity) can be ascertained using different methods, many of which have been proposed over the past decade. Among the new experimental techniques for archeointensity estimates is the Tsunakawa–Shaw method. This study demonstrates the validity of the Tsunakawa–Shaw method to reconstruct archeointensity from samples of baked clay from archeological relics. The validity of the approach was tested by comparison with the IZZI-Thellier method. The intensity values obtained coincided at the standard deviation (1σ) level. A total of 8 specimens for the Tsunakawa–Shaw method and 16 specimens for the IZZI-Thellier method, from 8 baked clay blocks, collected from the surface of the kiln were used in these experiments. Among them, 8 specimens (for the Tsunakawa–Shaw method) and 3 specimens (for the IZZI-Thellier method) passed a set of strict selection criteria used in the final evaluation of validity. Additionally, we performed rock magnetic experiments, mineral analysis, and paleodirection measurement to evaluate the suitability of the baked clay samples for paleointensity experiments and hence confirmed that the sample properties were ideal for performing paleointensity experiments. It is notable that the newly estimated archaomagnetic intensity values are lower than those in previous studies that used other paleointensity methods for the tenth century in Japan. |
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| format | Article |
| id | doaj.art-d4cd7c171daa47eb9106ae4fe0fbadd8 |
| institution | Directory Open Access Journal |
| issn | 1880-5981 |
| language | English |
| last_indexed | 2024-04-13T20:03:25Z |
| publishDate | 2018-05-01 |
| publisher | SpringerOpen |
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| series | Earth, Planets and Space |
| spelling | doaj.art-d4cd7c171daa47eb9106ae4fe0fbadd82022-12-22T02:32:07ZengSpringerOpenEarth, Planets and Space1880-59812018-05-0170111610.1186/s40623-018-0841-5Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relicsYu Kitahara0Yuhji Yamamoto1Masao Ohno2Yoshihiro Kuwahara3Shuichi Kameda4Tadahiro Hatakeyama5Graduate School of Integrated Science for Global Society, Kyushu UniversityCenter for Advanced Marine Core Research, Kochi UniversityDepartment of Environmental Changes, Faculty of Social and Cultural Studies, Kyushu UniversityDepartment of Environmental Changes, Faculty of Social and Cultural Studies, Kyushu UniversityDepartment of Biosphere-Geosphere Science, Faculty of Biosphere-Geosphere Science, Okayama University of ScienceInformation Processing Center, Okayama University of ScienceAbstract Paleomagnetic information reconstructed from archeological materials can be utilized to estimate the archeological age of excavated relics, in addition to revealing the geomagnetic secular variation and core dynamics. The direction and intensity of the Earth’s magnetic field (archeodirection and archeointensity) can be ascertained using different methods, many of which have been proposed over the past decade. Among the new experimental techniques for archeointensity estimates is the Tsunakawa–Shaw method. This study demonstrates the validity of the Tsunakawa–Shaw method to reconstruct archeointensity from samples of baked clay from archeological relics. The validity of the approach was tested by comparison with the IZZI-Thellier method. The intensity values obtained coincided at the standard deviation (1σ) level. A total of 8 specimens for the Tsunakawa–Shaw method and 16 specimens for the IZZI-Thellier method, from 8 baked clay blocks, collected from the surface of the kiln were used in these experiments. Among them, 8 specimens (for the Tsunakawa–Shaw method) and 3 specimens (for the IZZI-Thellier method) passed a set of strict selection criteria used in the final evaluation of validity. Additionally, we performed rock magnetic experiments, mineral analysis, and paleodirection measurement to evaluate the suitability of the baked clay samples for paleointensity experiments and hence confirmed that the sample properties were ideal for performing paleointensity experiments. It is notable that the newly estimated archaomagnetic intensity values are lower than those in previous studies that used other paleointensity methods for the tenth century in Japan.http://link.springer.com/article/10.1186/s40623-018-0841-5Archeointensity experimentSueki kiln in JapanTsunakawa–Shaw method |
| spellingShingle | Yu Kitahara Yuhji Yamamoto Masao Ohno Yoshihiro Kuwahara Shuichi Kameda Tadahiro Hatakeyama Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relics Earth, Planets and Space Archeointensity experiment Sueki kiln in Japan Tsunakawa–Shaw method |
| title | Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relics |
| title_full | Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relics |
| title_fullStr | Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relics |
| title_full_unstemmed | Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relics |
| title_short | Archeointensity estimates of a tenth-century kiln: first application of the Tsunakawa–Shaw paleointensity method to archeological relics |
| title_sort | archeointensity estimates of a tenth century kiln first application of the tsunakawa shaw paleointensity method to archeological relics |
| topic | Archeointensity experiment Sueki kiln in Japan Tsunakawa–Shaw method |
| url | http://link.springer.com/article/10.1186/s40623-018-0841-5 |
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