[S-EM19] Earth and planetary magnetism: Observations, modeling, and implications on dynamics and evolution

[SEM19-P01] Magnetic survey for buried old kilns with paleomagnetic and rock magnetic interpretation

*畠山 唯達^1,2、北原 優³、望月 伸竜⁴、下岡 順直⁵、鐘ヶ江 賢二⁶、松﨑 大嗣⁷、中村 直子⁸ (1.岡山理科大学情報処理センター、2.岡山理科大学大学院生物地球科学研究科、3.九州大学大学院比較社会文化研究院、4.熊本大学大学院先端科学研究部基礎科学部門、5.立正大学地球環境科学部、6.鹿児島国際大学考古学ミュージアム、7.指宿市教育委員会、8.鹿児島大学埋蔵文化財調査センター)

キーワード：磁気探査、古地磁気学

Magnetic surveys at an old kiln site cluster in Kagoshima Pref., southwest Japan were conducted, and five magnetic anomalies were detected on the hill slopes, based on a Cretaceous sedimentary rocks. A magnetic anomaly map at one of the sites was drawn and an elongated magnetic anomaly zone, along to the upward direction of the slope with 6 to 8 m length, was found. On the other hand, we obtained the paleomagnetic and rock magnetic results for the samples from an excavated old kiln, located nearby the magnetic anomaly site. Assuming the buried source of magnetic anomaly in consideration of paleomagnetic data, the expected magnetic field on the ground surface is calculated and it is well consistent between the observation and the calculation. It can be concluded that the source of the magnetic anomaly is a floor of an old kiln buried 40cm below the surface, northwardly magnetized. This result can indicate that the paleomagnetic and rock magnetic results provide a validated information about the underground objects in the magnetic surveys.