Budget Amount *help |
¥194,740,000 (Direct Cost: ¥149,800,000、Indirect Cost: ¥44,940,000)
Fiscal Year 2018: ¥21,710,000 (Direct Cost: ¥16,700,000、Indirect Cost: ¥5,010,000)
Fiscal Year 2017: ¥25,090,000 (Direct Cost: ¥19,300,000、Indirect Cost: ¥5,790,000)
Fiscal Year 2016: ¥24,830,000 (Direct Cost: ¥19,100,000、Indirect Cost: ¥5,730,000)
Fiscal Year 2015: ¥23,660,000 (Direct Cost: ¥18,200,000、Indirect Cost: ¥5,460,000)
Fiscal Year 2014: ¥99,450,000 (Direct Cost: ¥76,500,000、Indirect Cost: ¥22,950,000)
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Outline of Final Research Achievements |
It is very important to understand the Hadean Earth for decoding the history of the earth. However, it is difficult to directly study the Hadean Earth because geologic recode over 4.03 billion years before is not preserved yet. Thus, we tried to decode the evolution of the early Earth through establishment of an analytical method of 146Sm-142Nd isotope system, geological investigation of the Early Archean geologic terrains, and chemical and isotopic analysis of the Early Archean rock samples. We found the oldest rocks of 4.27 Ga mafic rocks and 3.95 Ga supracrustal rocks, evidence for the plate tectonics and organism from the 3.95 Ga Nulliak supracrustal belt, and the large-scale early differentiation and later homogenization. All of them are new discoveries, and give a significant insight into early earth evolution.
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