深水牵引流沉积研究进展与展望

THE RECENT ADVANCES AND PROSPECTSOF THE STUDY ON DEEP-WATERTRACTIVE CURRENT DEPOSITS

深水牵引流沉积是继深水重力流沉积之后发现的又一种新的深水沉积类型，目前已发现的深水牵引流沉积包括等深流沉积和内潮汐、内波沉积两种类型。综述了深水牵引流沉积的研究历史、现状与进展，指出了其存在的问题及发展趋势。

Deep-water tractive current deposits found include (1) contour current deposits and (2) internal-tide and internal-wave deposits. This paper summarizes the past, present states and latest developments of the study on deep-water tractive current deposits , and points out the existing problems and prospects. The study on contour current deposits started earlier and has obtained a series of achievements which mainly include : (1) the es- tablishment of recognition criteria of contour current deposits , (2) the discovery and study of contourite drifts , and (3) the study of ancient contour current deposits. The study of internal-tide and internal-wave deposits started just recently. Now we have discovered and studied systematically some internal-tide and internal-wave deposits and recognized four types of fancies , and have also established three types of sedimentary models. The main problems existing in the study of deep-water tractive current deposits are (1) unequilibri- um of the study of contour current deposits , (2) lack of detailed and systematic study on internal-tide and internal-wave deposits , (3) the reliability of recognition criteria of deep- water tractive current deposits, (4) the origin of large-scale sediment wave in deep-water , and (5) the study of diageneses and petroliferous of deep-water tractive current deposits. The significant progress will be obtained in the study of deep-water tractive current de- posits with the solution of these problems.