【摘要】 在"地震带实验项目"(NanTroSEIZE)的总体框架下,IODP 333航次的任务是在日本四国岛岸外一条断面的3个站位获取岩芯。钻探于2010年12月12日至2011年1月10日实施,钻取了4个长岩芯,总长达1 005 m。IODP 333航次的主要研究内容是陆坡、海沟底部和海山脊部的第四纪沉积过程,包括沉积层内的孔隙压力、热流通量、粘土矿物组分、孔内微构造、火山地层学等,以及海底大型坡移事件沉积,弄清其基本特征及其第四纪层序形成的影响。集成上述分析资料,可望揭示边缘沉积体性质及其对地层内应力分布、临界应力值和强震发生的影响。此外,钻取的岩芯还有助于其他一些科学问题的探讨,如深海泥质沉积体系形成、火山活动的周期性、深海绿色沉积的组分与成因、沉积构造垂向分布特征与形成过程、第四纪细颗粒物质的沉积动力过程与海底地貌演化等。更多还原

【Abstract】 The present contribution is a report submitted to the IODP-China office by the authors,after the implementation of the Integrated Ocean Drilling Program(IODP) Expedition 333.The objectives of this cruise are to drill at three sites along a transaction in the northern Philippine Sea,within the framework of the NanTroSEIZE program.The drilling operation was carried out from December 12,2010 to January 10,2011,and cores with a total length of 1 005 m were obtained.These cores provide the materials to study the Quaternary sedimentary processes and mass transport deposits associated with the slope basin,deep trench and sea mount environments.Laboratory analyses will be carried out to obtain information on pore pressure within the sediment,heat flux,clay mineralogy,micro-structures,and tephra stratigraphy.On such a basis,the influence of the accretionary prism on the stress distribution and the critical stress for the occurrence of large-scale earthquakes may be evaluated.Furthermore,the cores enable the researchers to seek solutions to other scientific problems,such as the formation of deep water fine-grained sediment deposits,periodicity of volcano activities,the mechanisms for the formation deep sea green muds,the vertical distribution patterns of sedimentary structures and the related processes,deep water sediment transport processes and the resultant geomorphological evolution during the Quaternary period.更多还原