| Budget Amount *help |
¥43,810,000 (Direct Cost: ¥33,700,000、Indirect Cost: ¥10,110,000)
Fiscal Year 2016: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2014: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2013: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2012: ¥23,140,000 (Direct Cost: ¥17,800,000、Indirect Cost: ¥5,340,000)
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| Outline of Final Research Achievements |
Mid-Cretaceous Oceanic Anoxic Events 2 and 1a are known as the extreme greenhouse climate periods. In order to understand paleo-environmental in the Northwest Pacific during OAE 2, 1a, we examined microfossil assemblage, carbon- and osmium isotope stratigraphy and clay mineral crystallinity of the OAE 2 and 1a intervals exposed in Japan. In the OAE 2 period, the emplacement of Large Igneous Provinces released large amounts of CO2 which induced a remarkable wet climate in the eastern margin of the Asian continent. Delivery of a large amount of nutrients from the land to the ocean caused elevation of primary productivity in the ocean surface, and resulted in depletion of oxygen in the ocean. The depletion oxygen continued relatively short period of time less than 100,000 years. On the other hand, in the OAE 1 a, anoxic environments in the ocean lasted over one million years in the Northeast Pacific.
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