| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2016: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
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| Outline of Final Research Achievements |
Paleo- and rock magnetic measurements were conducted on sedimentary cores recovered at four sites in the northwest Atlantic during the Integrated Ocean Drilling Program Expedition 342. Continuous variation of relative paleointensity (RPI) of the geomagnetic field could be estimated from the cores at the two sites, for a period of 38-50 million years ago. This is the oldest RPI record reported so far. The estimated RPI showed repeated large fluctuations, intensity minima at chron boundaries, and so on. These characters are the same as those reported in the RPI of the last 2-3 million years.
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