CAJ | 학술논문

利用中国历次北极科学考察航次在白令海北部陆坡及海盆等深水区所采集的沉积物样品，对其开展沉积学等研究，系统归纳该海域常见的异常沉积类型及特征，并初步探讨其可能成因。BR02孔出现至少3段浊积层，浊积层主要分布于末次冰消期至中全新世。B5-4孔存在至少2段火山碎屑沉积层，其沉积年代分别约为1．3 ka BP和13．2 ka BP。B5-7站表层沉积物中的硅藻组合以新近系硅藻化石Kisseleviella carina Sheshukova-Poretzkaya和Kisseleviella ezoen-sis Akib为主，且与附近海域其他表层沉积物的硅藻组合面貌差异明显，可能是沉积物再沉积结果，其初始沉积年代大约为早中新世。白令海北部陆缘/陆坡区附近遍布的海底大峡谷对该区沉积物沉积过程具有重要影响，可能是导致该区浊流沉积与再沉积物的主要原因。此外，白令海位于欧亚板块、太平洋板块及北美板块交汇区边缘，其独特的地理位置决定该区地震与火山等构造活动相对活跃，进而进一步促使该区海底异常沉积现象频发。
이용중국력차북겁과학고찰항차재백령해북부륙파급해분등심수구소채집적침적물양품，대기개전침적학등연구，계통귀납해해역상견적이상침적류형급특정，병초보탐토기가능성인。BR02공출현지소3단탁적층，탁적층주요분포우말차빙소기지중전신세。B5-4공존재지소2단화산쇄설침적층，기침적년대분별약위1．3 ka BP화13．2 ka BP。B5-7참표층침적물중적규조조합이신근계규조화석Kisseleviella carina Sheshukova-Poretzkaya화Kisseleviella ezoen-sis Akib위주，차여부근해역기타표층침적물적규조조합면모차이명현，가능시침적물재침적결과，기초시침적년대대약위조중신세。백령해북부륙연/륙파구부근편포적해저대협곡대해구침적물침적과정구유중요영향，가능시도치해구탁류침적여재침적물적주요원인。차외，백령해위우구아판괴、태평양판괴급북미판괴교회구변연，기독특적지리위치결정해구지진여화산등구조활동상대활약，진이진일보촉사해구해저이상침적현상빈발。
Sediment samples from previous Chinese Arctic Research Expeditions in the northern continental slope and thedeep basin of the Bering Sea were used for sedimentological studies.Abnormal sedimentary types and their charac-teristics are summarized,and their possible causes are preliminarily discussed.At least three turbidite layers appearin core BR02,which are distributed mainly from the last deglacial to the Mid-Holocene.More than two volcaniclas-tic sedimentary layers were found in Core B5-4,which formed at ca.1.3 ka BP and 13.2 ka BP.The diatom as-semblage of the surface sediment of Core B5-7 is dominated by the Neogene fossil diatoms Kisseleviella carina She-shukova-Poretzkaya and Kisseleviella ezoensis Akib,which is distinctively different from the assemblages in other ad-jacent surface sediments.We presume that this could be the result of reworking,and its initial depositional agecould be about early Miocene.The numerous submarine canyons incising the continental margin of the Bering Seamay have a large impact on the sedimentary processes,which could be the main reason for the presence of abnormalsedimentation processes in this region.Moreover,the unique location of the Bering Sea,along the margin betweenthe Eurasian Plate and the North American Plate,means that it often suffers from earthquakes and volcanic activity,which in turn promote the frequent occurrence of submarine abnormal sedimentation processes.