Reconstracted ocean floor environment at Acehan and Proterozoic

Acehan和元古界项目的海底环境重建重点是深海沉积岩，确定了保存良好的地层条件部分。特别是2007年成功完成的DXCL钻探工程，获得了200m长的3.2Ga沉积层序，获得了富含有机碳的黑色页岩层序。这些结果表明在这个时期已经发生了非常广泛和强烈的生物活动。

Reconstracted ocean floor environment at Acehan and Proterozoic Project focus to deep sea sedimentary rocks which destributed well preserved stratigraphic condition portion. We did geological mapping, drilling and geochemical analysis.Especially, DXCL drilling project successfully done in 2007.We get 200m long 3.2Ga sedimentary sequence and get Organic carbon rich black shale's sequence. These result shows very wide and intense biological activity already occur in this time.