CAJ | 학술논문

通过对武汉东西湖区典型第四纪钻孔ZK02孔沉积物的粒度特征分析，重建了武汉东西湖区第四纪以来的沉积环境演变过程。结果显示，该区早更新世时期为河流相的沉积环境；中更新世—晚更新世晚期，为河湖交替相的沉积环境；全新世早期—全新世中期，为开阔的河流相沉积环境；全新世中期以来，整体处于湖泊沼泽相的沉积环境。区域上地层对比还显示该区全新世地层沉积厚达50 m，可能是晚更新世晚期全球气温骤降，海平面急剧下降导致汉江水系下切侵蚀后快速堆积形成的，沉积记录显示末次冰盛期该区存在最深海拔达－22 m的深切河槽现象。
통과대무한동서호구전형제사기찬공ZK02공침적물적립도특정분석，중건료무한동서호구제사기이래적침적배경연변과정。결과현시，해구조경신세시기위하류상적침적배경；중경신세—만경신세만기，위하호교체상적침적배경；전신세조기—전신세중기，위개활적하류상침적배경；전신세중기이래，정체처우호박소택상적침적배경。구역상지층대비환현시해구전신세지층침적후체50 m，가능시만경신세만기전구기온취강，해평면급극하강도치한강수계하절침식후쾌속퇴적형성적，침적기록현시말차빙성기해구존재최심해발체－22 m적심절하조현상。
Through analyzing grain size characteristics of the typical quaternary core sediments in Dongxihu District, Wu-han, the paper rebuilt the sedimentary environment evolution process since the Quaternary.The results showed that Dongxihu District was a river phase sedimentary environment in the early Pleistocene,a river-lake facies sedimentary en-vironment in Middle Pleistocene to late Pleistocene.Early Holocene to Middle Holocene was a open river facies sedimen-tary environment,overall in the lacustrine swamp facies sedimentary environment since Middle Holocene.Regional strati-graphic correlation also showed the Holocene sedimentary thickness was not less than 50 meters,which was probably af-fected by global drop in temperatures during late stage of late Pleistocene,and sea level sharply dropped caused the Han River down-cutting and sediments accumulated rapidly.Sedimentary records showed that the river depth reached an alti-tude of -22 meters belowthe in last glacial maximum period.