Characteristics Of Sediment Granularity, Element Geochemistry And Their Significance For Identifying Sedimentary Dynamic Environment In The Quanzhou Estuary

Sedimentary environment in the estuary is a key problem of modern sedimentation research.This paper relies on the horizontal subject with Taiwan,which named FEASIBILITY STUDY OF COASTAL PROTECTION AND RESTORATION IN QUEMOY(JIN-MEN).By analyzing the granularity and geochemical characteristics of the investigated sediment,which are derived from contiguous sea regions of Quanzhou estuary,we depicted Granularity parameters and distribution characteristics,and made further studies on the transportation action of the sediments,enrichment rules of elements,and elements distribution controlling factors.Then the modern depositional dynamic environment has been discussed in this paper on the basis of the granularity parameters and the elements combination characteristics.Sand is the major sediment type in study area.Histogram to the frequency of sand over the main component,the content in more than 95%;clayey silt and silty sand saltation separation of components from different linear sections,the second component is greater than saltation saltation the first group;Sandy silt to saltation and suspension components in the first than the second component saltation saitation component,frequency histogram sambong performance.Elements in the sediment SiO₂ and Al₂O₃ content in the highest,the total chemical composition of the total of 69.97%～85.59%range on the chemical composition of sediments in the main silicate and aluminum silicate.Inside and outside of estuary the most mouth waters coarse sediment particle size, handling time-based approach to.Entrance doors and falling waters of the island's north-west of sediment types,including clayey silt,sandy silt and a small portion of the sand,silty sand,increase the proportion of suspended transport.Source material for more than two regions for land-based sources of debris,the former enriched SiO₂, K₂O,Nb,Zr,most of the remaining elements of the latter low-enriched Al₂O₃,Fe₂O₃, MgO,P,Mn,Ti,Pb,Zn,Cr,Co,Ni,V.Each chemical element has a unique geographical distribution,divided in accordance with the deposition of particle dynamic environment with a better consistency Division.The modern sedimentary environment in Quanzhou Estuary can be classified into three types based on the characteristics of sediments granularity.â… type of sedimentary cover all areas of sandy,silty sand deposition areas,are under strong hydrodynamic conditions of the high-energy environment;â…¡type deposits sediment type is clayey silt,the complexity of the hydrodynamic condition is relatively sTablele but moderate;â…¢type deposition mere value of the cumulative probability map from the four sections of a straight line,double jump may be associated with the emergence of waves and the scouring effect of the return,on behalf of a strong role in the election of Britain waves,normally found in beach sand.The result of element analysis by R-factor of study area shows that sediments of Quanzhou estuary most likely come from terrigenous clastic.The dominant factors which make the difference of the granularity and geochemical characteristics and its spatial distribution are transportation,sorting and transformation effect by hydrodynamic.In addition,man-made alteration is a certain extent of geochemical spatial distribution.