• 责任者：Yu Xing (Key Laboratory of Submarine Geosciences ; Second Institute of Oceanography ; SOA ; Hangzhou 310012 ; China) ; Chu Fengyou
• 刊名：Earth Science
• 出版年：2013
• 卷期：38(5)
• 关键词：海底扩张 ; sea-floor spreading ; 滑脱断层 ; detachment faults ; 变质核杂岩 ; metamorphic core complexes
• 页码：p.995-1004
• 图表：5 illus., 1 table, 61 refs.
• 分类号：0300
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

     A new type of seafloor spreading mode has recently been well acknowledged among earth science community.It is different from normal magmatic spreading ridge.It is usually found along the slow or ultraslow spreading ridge where the segment is amagmatic or depleted in magma.The plate separation is mostly accommodated by detachment fault slipping.The low-angle large-offset detachment fault will uplift the footwall and exhume lower crust and upper mantle rocks,which is called oceanic core complex.The oceanic core complex,also named as megamullion,is often marked by corrugations and striations parallel to the extension direction.This paper presents the characteristics of this new kind of spreading mode based on in-depth argument about terminology of detachment fault and oceanic core complex.A distribution map of the known oceanic core complex has been composed.The possible methods and techniques that can be used to recognize oceanic core complexes are also discussed in this study,and so does the significance of the new findings and its influence on seafloor hydrothermal activity and mineral deposit.