CAJ | 학술논문

第五次北极科学考察在北极区的白令海首次进行了高分辨率单道地震作业。Navarinsky 峡谷头部测线 BL11-12剖面中部识别出不对称沙波，陡的一面朝向陆架，波高约为9 m、波长约为882 m。结合站位 U1345的沉积速率及站位 U1344表层纵波速率推测沙波沉积可以追溯到中更新世（距今约0．258 Ma），同时近陆架的洼地逐渐填平。将地层分为3个沉积层，分析沉积物变化情况，结合0．25 Ma 以来白令海海平面变化历史，推测最大海退事件对应的界面。结合沙波的地理位置及海平面变化情况，认为内波对沙波的形成起主要作用。
제오차북겁과학고찰재북겁구적백령해수차진행료고분변솔단도지진작업。Navarinsky 협곡두부측선 BL11-12부면중부식별출불대칭사파，두적일면조향륙가，파고약위9 m、파장약위882 m。결합참위 U1345적침적속솔급참위 U1344표층종파속솔추측사파침적가이추소도중경신세（거금약0．258 Ma），동시근륙가적와지축점전평。장지층분위3개침적층，분석침적물변화정황，결합0．25 Ma 이래백령해해평면변화역사，추측최대해퇴사건대응적계면。결합사파적지리위치급해평면변화정황，인위내파대사파적형성기주요작용。
High resolution single channel seismic operation was carried out in the Bering Sea during the 5th Chinese National Expedition.Asymmetric sand waves were identified on line BL11-12 seismic profile in the head of Nava-rinsky Canyon.The steep faces of asymmetric sand waves were on-shelf direction,the averaged wave height was 9 m and length was 882 m.There was a sedimentary depression at the end of line BL11-12 seismic profile.Com-bined the sedimentation rate of site U1345 and Vp of superficial sediment at site U1344,Infered that sand waves began deposit and sedimentary depression was filled since the Middle Pleistocene(about 0.258 Ma).Stratum was divided into three sediments.Analyzing changes of grain size on the profile,we can speculate the surface relating to the maximum regression combined with the change of the bering sea level.Taking every aspect into consideration, draw conclusion that sand waves formed during the low sea level in Middle Pleistocene,and internal wave played a significant role.