| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
The Godzilla Megamullion, the largest oceanic core complex in the world, is located at the extinct Parece Vela Basin in the Philippine Sea. Fault rocks are common on the surface of the Godzilla Megamullion, indicating the presence of a detachment fault exposed on the seafloor. We focus on amphiboles in the fault rock (i.e., deformed gabbroic rocks) in order to reveal the geochemical characteristics of hydrothermal circulation system along detachment fault using trace element geochemical analyses of the fault rocks sampled from three stages (i.e., initial, medial and final stages) of development of the Godzilla Megamullion. We observed a sign of melt and hydrothermal fluid analyzed by geochemical analyses of amphibole and amphibole of the fault rock showed the different geochemical characteristics in each stage. It indicates that the different hydrothermal circulation system along the detachment fault could develop at three stages of development of the Godzilla Megamullion.
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