南黄海西部陆架区末次盛冰期古河谷体系地貌形态特征  

GEOMORPHOLOGICAL CHARACTERS OF PALEO CHANNEL SYSTEMS IN LAST GLACIAL MAXIMUM IN THE WEST OF SOUTH YELLOW SEA SHELF

作　　者：孔祥淮[1,2,3] 毕世普[1,2,3] 刘健[1,2,3] 宋晓帅 徐承芬[1,5] 马晓红[1,6] 

机构地区：[1]国土资源部油气资源和环境地质重点实验室,青岛266071 [2]青岛海洋国家实验室海洋地质过程与环境功能实验室,青岛266061 [3]青岛海洋地质研究所,青岛266071 [4]河北地质大学,石家庄050031 [5]中国地质大学地球科学与资源学院,北京100083 [6]中国海洋大学地球科学学院,青岛266100

出　　处：《海洋地质与第四纪地质》2016年第6期123-133,共11页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目(41476051;41376079);中国地质调查局项目(1212010611401;GZH201200506)

摘　　要：以高分辨率浅地层地震剖面解译资料为基础,对南黄海西部陆架区埋藏古河谷体系进行地貌形态特征分析。结果表明,在南黄海西部陆架浅海区海底以下几米到十几米埋藏着末次冰期最盛期形成的两大树枝状古河道网,主干河道断面向海逐渐变宽、加深;研究区末次盛冰期古河道除了具有其他海域古河道的U形和V形特征外,还有W形、箱形(近似矩形)和倒梯形河道断面。复合式和双层(多层)河道以及不对称型河道断面形态也比较常见,反映了研究区末次盛冰期古河道具有复杂的断面形态组合形式。Geomorphological characters of buried paleo-channel systems in the western South Yellow Sea are studied in this paper,based on the interpretation of high resolution seismic profiles.It is found that there are two complex dendritic drainage systems developed during the Last Glacial Maximum（LGM）on the continent shelf of the South Yellow Sea,shallowly buried several to tens of meters below the sea floor.Main paleo-channels are getting wider and deeper towards the sea.Excluding the U and V-shaped channels which are common in other areas,there are other types,such as W-shaped,boxlike（approximate rectangle）and inverse trapezoid channels.And compound,double（or multilayer）and asymmetry types are also common,indicating a complex paleo-channel system in LGM.

关 键 词：浅地层剖面 古河道地貌形态 末次盛冰期 南黄海西部陆架区 

分 类 号：P737[天文地球—海洋地质]