동해 및 황해에서 대륙붕 퇴적물에 대한 육지성 기록: 한반도 주변 주요강에의 기여에 대한 고찰

Abstract

The various rivers play a significant role in accumulation of terrestrial material in coastal and shelf sediment. In particular, coastal and continental shelf areas adjacent to the Korean major river system are presently receiving riverine sediments discharge into the marine environment as a result of the recent postglacial sea-level changes. It is suggested that the mud belt deposit on the inner shelf of the Ulleung Basin, East/Japan Sea were mostly come from the Nakdong River, southern part of Korea [1]. The high resolution seismic profile showed that the transparent subbottom is the most striking feature of in these shallow sediments. The southward flowing north Korea Current, the northward flowing East Sea coastal Current have played crucial roles in transporting and trapping most of the river-derived material in the inner shelf [1]. In Yellow Sea, large amount of terrestrial material as well as biogenic component such as foraminifera and organic carbon were supplied by the neighboring land area and in situ marine environment [2]. Multi proxies of the terrestrial records indicate that the southeastern Yellow Sea changed from an estuarine to a modern marine shelf environment, probably due to the Yellow Sea Warm Current.The direct observation of sediment component of those piston cores clearly shows large amount of terrestrial material were supplied from nearby land areas [2,3]. Thi