A review of OSL dating for water-laid deposits:progress and prospect

OSL dating method has been widely used for dating sediments,most of which are wind-laid.There are many difficulties to use OSL dating method for dating water-laid deposits,such as alluvial,fluvial and lacustrine deposits,which need more chronological data support and contain abundant information of regional climate and environment change,ancient flood,ancient earthquake and geological structure.Therefore,application of the OSL dating method in water-laid deposits has been baffled to some extent.Can optical signal preserved in mineral particles of water-laid deposits be bleached in the process of transportation and deposition? Is that bleaching even? How is the residual level? How to determine the equivalent dose of nature optical signal intensity of the water-laid deposits? How to mensurate the equivalent dose accurately? These are decades-long problems concerned by OSL dating researchers home and abroad.In this paper,progresses in this field of research are reviewed,the recent research status and problems are discussed,and prospect of applying the OSL dating method to water-laid deposits is given.