|Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2014: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2012: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
|Outline of Final Research Achievements
Great Oxidation Event (GOE) is one of the most important events in the Earth history that shaped our planet to a habitable one. Here we have attempted to understand the processes that led to the increase of oxygen in the atmosphere during the period (3.0 to 2.5 Ga) just before the onset of GOE through a detailed geological, geochronological, geochemical and isotopic study of the Chitradurga Schist Belt in Western Dharwar Craton, India. Mass independent fractionation using multiple sulfur isotope studies combined with carbon, oxygen isotopes and strontium and neodymium isotopes revealed the possibility of episodic oxygen pulses to the atmosphere, rather than an instantaneous increase. Comparison of newly obtained data with those from other terranes were also carried out in this study, which supported out conclusion.