The Response Relation Between Salt Sediment and Tectonic Activity in Wuyang Depression

Key words: 
• salt sediment

Abstract: At He 21 sedimentary stage, there appeared a lot of salt sediments while they all disappeared at the end of He_1 stage in Wuyang depression.Both of qualitative method and quantitative method are used in this paper, which can recover the relationship between salt sediment and tectonics effectively in this sag.Through this study, two results are as follows: (1) The sedimentary end of He 22 section is a very important tectonic activity stage, when the whole depression began uplift while the basal strikeslip tectonic started to reactivate.The He 3 and He 22 sedimentary stratum which deposited before the key stage have obvious difference with the ones of He 21 and He 1 that deposited after the key stage.(2)The response relation between salt sediment and tectonic activity is definite in Wuyang sag.The tectonic activity controlled the change of basin boundary, which made the study area a relatively closed depression, then decreased the provenance into the basin, the salt started to deposit.