等深流作用机制和沉积的研究进展

Contour current dynamics process and deposits:A Review

等深流是大洋环境非常重要的动力学机制,其沉积蕴含了重要的古海洋学和古气候信息,对其进行解析是近些年国际海洋学、气候学的研究热点。等深流是顺陆坡走向流动的牵引流,其侵蚀—沉积效应取决于陆坡地貌、气候旋回等多种因素,认识等深流侵蚀—沉积的动力学规律是学术界关注的焦点之一,也具有重要的油气经济意义。探究等深流沉积的新类型、等深流沉积的形态和叠加—迁移型式,以及它们发育的背景和控制因素,也是近些年学术界和工业界关注的热点。确定等深流作用机制及其沉积响应的研究脉络,对凝聚研究方向和确定科研目标至关重要。

Contour current is one of the important sedimentary dynamics, the deposits （so-called contourite） of which contain important information of palaeooceanography and palaeoelimatology. In recent years the analyses of new kinds of contourite are the hotspots of international researches of oceanography and climatology. Contour current is the tractive current which flows along the slope. Its erosional-depositional response depends on many factors including the slope topography, climate and so on. The recognition of erosional-depositional dynamic regularity of the tractive current is one of the academic focuses and has important hydrocarbon economic significance. In recent years, great attention has been paid to new types of contour current deposit, the stacking and migrating pattern of contour current deposit and its developing setting and controlling factors.