[S-EM13] Geomagnetism, paleomagnetism and rock magnetism

Sun. Jun 6, 2021 1:45 PM - 3:15 PM Ch.21 (Zoom Room 21)

convener:Chie Kato(Faculty of Social and Cultural Studies, Kyushu University), Tetsuro Sato(Earthquake Research Institute, The University of Tokyo), Chairperson:Chie Kato(Faculty of Social and Cultural Studies, Kyushu University), Tetsuro Sato(Earthquake Research Institute, The University of Tokyo), Yutaka Yoshimura(Faculty of Social and Cultural Studies, Kyushu University)

We are going to discuss the issues on the magnetic fields of the Earth and planets, paleomagnetism, rock-magnetism, and their applications. This session includes following topics: (1) observation and analysis of the magnetic fields of the Earth and other planets, (2) paleomagnetic field variations obtained from natural and archaeological materials, (3) numerical simulations on the magnetic fields of the Earth and planets, (4) measurements and theories of magnetic properties of rocks, minerals, meteorites, and other materials, (5) climate changes and surface tectonics based on the paleomagnetic measurements of rocks and sediments, (6) observations of the magnetic anomalies and the crustal magnetization models of the Earth, planets, and satellites, and (7) developments of the measurement method and data analysis. We also encourage papers stimulating an interdisciplinary collaboration relating to establishment of the SEDI-Japan community. The presentations and discussions will be made in Japanese or English in this session.

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1:45 PM - 2:00 PM

[SEM13-01] Revised magnetostratigraphy and eruption timing of Afro-Arabian Large Igneous Province using new ⁴⁰Ar/³⁹Ar ages

*Yutaka Yoshimura¹, Osamu Ishizuka², Toshitsugu Yamazaki¹, Yuhji Yamamoto³, Hyeon-Seon Ahn³, Tesfaye Kidane⁴, Yo-ichiro Otofuji^5,6 (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Institute of Earthquake and Volcano Geology, Geological Survey of Japan, AIST, 3.Center for Advanced Marine Core Research, Kochi University, 4.School of Agricultural, Earth, and Environmental Sciences, University of KwaZulu Natal, 5.Institute of GeoHistory, 6.Kobe University)

2:00 PM - 2:15 PM

[SEM13-02] Palaeomagnetism of ca. 3-4 Ma lavas from Borgarfjordur, Iceland - magnetostratigraphy and paleosecular variation of direction

Maxwell Christopher Brown^1,2, *Yuhji Yamamoto³, Hiroyuki Hoshi⁴, Masaru Kono⁵, Hidefumi Tanaka³, Takehiro Koyaguchi⁶, Brian Jicha⁷, Kohei Masaoka^3,8, Vivian Sinnen², Justin Tonti-Filippini^2,9, Hiroto Ishikawa³, Richard Bono¹⁰ (1.University of Minnesota, 2. University of Iceland, 3.Kochi University, 4.Aichi University of Education, 5.Tokyo Institute of Technology, 6.University of Tokyo, 7.University of Wisconsin-Madison, 8.Kyushu University, 9.Ludwig Maximilian University of Munich, 10.University of Liverpool)

2:15 PM - 2:30 PM

[SEM13-03] Archeointensity variation for the past millennium from Reunion Island

*Koji Fukuma¹, Hisatoshi Ito² (1.Department of Environmental System Science, Faculty of Science and Engineering, Doshisha University, 2.Central Research Institute for Electric Power Industry)

2:30 PM - 2:45 PM

[SEM13-04] Analyzing the early 19th century's geographical points in latitude and longitude of 0.2 second level and geomagnetic declination through Japan from Tadataka Inoh's magnetic survey azimuth ledger simultaneously.

*Motohiro Tsujimoto¹ (1.none)

2:45 PM - 3:00 PM

[SEM13-05] Effects of cooling from the CMB on geodynamo with different Rayleigh numbers and inner core radii

*Yuki Nishida¹, Yuto Katoh¹, Hiroaki Matsui², Masaki Matsushima³, Takumi Kera¹, Atsushi Kumamoto¹ (1.Department of Geophysics, Graduate School of Science, Tohoku University, 2.Dept. of Earth and Planetary Sciences, University of California, Davis, 3.Department of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology)

3:00 PM - 3:15 PM

[SEM13-06] An attempt to detect a stratified layer at the core surface from a geomagnetic field model

*Masaki Matsushima¹ (1.Department of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology)

Session information

[S-EM13] Geomagnetism, paleomagnetism and rock magnetism

[SEM13-01] Revised magnetostratigraphy and eruption timing of Afro-Arabian Large Igneous Province using new ⁴⁰Ar/³⁹Ar ages

[SEM13-02] Palaeomagnetism of ca. 3-4 Ma lavas from Borgarfjordur, Iceland - magnetostratigraphy and paleosecular variation of direction

[SEM13-03] Archeointensity variation for the past millennium from Reunion Island

[SEM13-04] Analyzing the early 19th century's geographical points in latitude and longitude of 0.2 second level and geomagnetic declination through Japan from Tadataka Inoh's magnetic survey azimuth ledger simultaneously.

[SEM13-05] Effects of cooling from the CMB on geodynamo with different Rayleigh numbers and inner core radii

[SEM13-06] An attempt to detect a stratified layer at the core surface from a geomagnetic field model

Authentication

Session information

[S-EM13] Geomagnetism, paleomagnetism and rock magnetism

[SEM13-01] Revised magnetostratigraphy and eruption timing of Afro-Arabian Large Igneous Province using new 40Ar/39Ar ages

[SEM13-02] Palaeomagnetism of ca. 3-4 Ma lavas from Borgarfjordur, Iceland - magnetostratigraphy and paleosecular variation of direction

[SEM13-03] Archeointensity variation for the past millennium from Reunion Island

[SEM13-04] Analyzing the early 19th century's geographical points in latitude and longitude of 0.2 second level and geomagnetic declination through Japan from Tadataka Inoh's magnetic survey azimuth ledger simultaneously.

[SEM13-05] Effects of cooling from the CMB on geodynamo with different Rayleigh numbers and inner core radii

[SEM13-06] An attempt to detect a stratified layer at the core surface from a geomagnetic field model

Authentication

[SEM13-01] Revised magnetostratigraphy and eruption timing of Afro-Arabian Large Igneous Province using new ⁴⁰Ar/³⁹Ar ages