JpGU-AGU Joint Meeting 2017

Presentation information

[JJ] Oral

S (Solid Earth Sciences) » S-EM Earth's Electromagnetism

[S-EM20] [JJ] Geomagnetism, Paleomagneteism and Rock Magnetism

Sat. May 20, 2017 10:45 AM - 12:15 PM A03 (Tokyo Bay Makuhari Hall)

convener:Yusuke Suganuma(National institute of Polar Research), Yuhji Yamamoto(Center for Advanced Marine Core Research, Kochi University), Tadahiro Hatakeyama(Information Processing Center, Okayama University of Science), Chairperson:Yusuke Suganuma(National institute of Polar Research)

11:00 AM - 11:15 AM

[SEM20-08] Paleomagnetism and rock magnetism of Nishiyama old kilns of Shino old kiln complex

*Tadahiro Hatakeyama1, Yu Kitahara2 (1.Information Processing Center, Okayama University of Science, 2.Graduate School of Integrated Sciences for Global Society)

Keywords:Paleomagnetism, Rock magnetism, Archaeology

Sue wares are produced during the 5-10th century in the many part of Japanese islands, which was followed by the posterior and developed potteries. Sue wares were baked in the closed semi-underground or full-underground kilns with high temperature and anoxic environment. Therefore, the main magnetic mineral remaining is magnetite and it is thought to be very suitable for paleomagnetic analyses and there have been many paleomagnetic achievements.
Shino old kiln complex is located in the west of Kyoto old capital and includes over 100 old kilns. They were operated mainly in the 8-11th century, which follows the main period of the Sue-mura and other Sue-were complexes. Paleomagnetic results from Shino kilns are expected to fill the gap between Sue-were period and the new-generation potteries after the 11th century.
Here we report the paleomagnetic results from Nishiyama 1-1 and 1-2 old kilns in the Shino group. The paleodirections from the two kilns show a difference, which indicates the gap of the operated dates. Acctually the archaeological investigations of the pottery morphology and stratigraphy of the ash field also show the same result that the 1-2 kiln is half-of-century newer than the 1-1 kiln.
The age of the kilns estimated by matching of the direction onto the regacy geomagnetic secular variation curve (Hirooka, 1977) is different from the archaoelogical age. However, in case of using our new secular variation model, there is a consistency between paleomagnetic and archaeological ages.