한 국 해 양 연 구 원

본 보고서는 "한국해양연구원 창의사업(2008)"의 최종보고서로 제출됩니다. 연구소명 : 한국해양연구원 책임연구원 : 임동일

추진필요성 및 목적

추진필요성

남해 무인도 연구의 법적 타당성. 국토자원으로서의 무인도 관리정책 부재.

목적

Abundant carbonate concretions have been found in gas hydrate-bearing sediments from the western slope area of the Ulleung Basin (East Sea). Zhang C, Wang L, Zhang S (1998) Geochemistry of rare earth elements in the main stream of the Yangtze River, China.

국내외 연구개발 동향 및 분석

연구개발 목표

최종 목표

단계별 연구 목표

Recently, a multichannel seismic survey in the Ulleung Basin in the East Sea revealed various seismic indicators of the presence of gas hydrate and associated gas, including a bottom-simulating reflector (BSR) and seismic chimneys (Horozal et al., 2009). . Two piston cores (ROV07-3 and 4) were taken from the western slope area (approximately 1500 m water depth) of the Ulleung Basin in the East Sea, where gas seeping structures were observed. The mineralogy of carbonate concretions from gas-enriched sediments of the Ulleung Basin in the East Sea is dominated by HMC (Table 1).

The drainage basins of the three Korean rivers (Han, Keum, and Yeongsan, <4×104km2 combined) are significantly smaller than those of the Chinese rivers (Huanghe and Changjiang, >2×106km2 combined) investigated in this study. . Most of the Changjiang sediments come from weathered materials (i.e., carbonate rock) of the upper part, especially those around Jinshajiang (Wang et al. These include the relocation of the Huanghe drainage system from the southern Yellow Sea to the northern Yellow Sea ( Bohai Sea) about 150 years ago (Ren and Shi 1986).

However, in the case of the Huanghe sediments, the REE content differs somewhat from that of the main potential Chinese loess source. The medium to heavy REE content of the river sediments is generally lower than the content of. Lan X, Wang H, Li R, Lin Z, Zhang Z (2007) Major element composition and provenance analysis in the sediments of the southern Yellow Sea.

Liu J, Saito Y, Wang H, Yang Z, Nakashima R (2007) Sedimentary evolution of the Holocene submarine clinoform off the Shandong Peninsula in the Yellow Sea. Nohara M, Yokoto S, Saito Y (1999) Sr-Nd isotopic and trace elements are constrained by the origin of the sediments of the Yellow and East China Seas. Ren ME, Shi YL (1986) Sediment discharge of the Yellow River (China) and its effect on the sedimentation of the Bohai and Yellow Seas.

Fig. 1. Map showing (a) study area and (b) core location in the study area with bathymetry (m)

연구의 내용 및 범위

연구의 목표 및 범위

연구대상 기술의 개발 가능성

Stable carbon isotope ratios are reported in standard d notation in per mil (%) relative to the Peedee Belemnite (PDB) standard and the accuracy of the analysis was estimated to be 0.3%. 0.5 x 109 ton/year sediment discharge up to the 1980s (Chen et al.2008) flows in central and eastern China along the edge of the monsoon area with high precipitation. The REE content and UCC-normalized patterns of the Korean and Chinese bottom river sediments assessed in the present study are very similar to those recorded by Yang et al. in the suspended matter of these rivers.

Therefore, the high ∑LREE/∑HREE fractionation ratios of river sediments likely reflect the abundance of LREE-enriched granitic rocks in the drainage areas of Korean rivers. However, in general terms, the REE characteristics of Chinese river sediments resemble those of their potential source rocks (Fig. 6b). Wu MQ, Wen QZ, Pan JY, Diao GY (1991) Rare earth elements of Malan loess from the middle reaches of the Huanghe River.

At the base of the cliff, small pocket beaches have developed approximately 1 m above sea level. At the base of the cliff, small pocket beaches have developed approximately 1 m above sea level.

단계별 수행 연구 과제

연구개발 추진전략 및 체계

기본방안

기존 국립 무인도 자연환경조사팀과 유기적인 관계를 구축하고 통합데이터를 구축합니다. 남해권 무인도의 종류별, 군별 관리방안을 제시합니다.

추진전략

연구개발 추진일정

기대성과 및 활용방안

결론 및 정책적 시사점

결론

정책적 시사점

소요예산

남해 무인도 주변 수역은 인간의 간섭이 비교적 적고 생물학적, 환경적, 생태적, 해양자원 가치와 관광적 가치가 매우 높으며, 각 섬은 고유한 지형/지질/환경/생태적 특성을 유지하고 있습니다. 생태계 박물관(생태축)으로 보존 가치가 매우 높습니다. 따라서 해양영토관리, 기후변화, 해양환경 보전 등 국가적 현안을 해결하기 위해서는 무인도 및 주변해역에 대한 종합적인 관리가 필요하다. 최외곽 남해역 및 전략(무인)도서 주변해역에 대한 체계적이고 종합적인 해양과학연구를 통한 해양환경 보전, 기후변화 모니터링 및 해양영토 관리(해양생태/기후건강 평가 및 지표)에 대한 과학적 기반 계산) 데이터 보호 .

암석/수중/해저 등 해양생태환경의 정확한 특성 규명 및 생물다양성 연구 - 무인도 주변 보호종/해조류 군집 연구 및 해양생태계 건전성 평가 - 무인도 간 환경/생태적 관계 연구 기후변화 연구 및 국토관리를 위한 해양과학자료를 제공합니다. 지구 해양환경 변화를 모니터링하고 기후변화에 민감한 지표를 개발하기 위해 외래종을 모니터링함으로써 해양환경 및 기후변화에 대한 연구를 수행합니다.

무인도 및 주변 해양환경의 보전·개발을 위한 정책관리방안 도출 인문사회-해양과학 무인도 및 주변해역 정보지도.

Such methane probably originated from the destabilization of the underlying gas hydrates as strongly supporting the enriched18O levels. In addition, the occurrence of carbonate (CaCO3) nodules has been reported from the piston core sediments of the Ulleung Basin of the Baltic Sea (Dr. D. Yoo, personal communication). Therefore, these carbonate concretions probably formed near the sulfate-methane interface, at the emplacement depth of the AOM.

Lee from the Korea Ocean Research and Development Institute (KORDI) who kindly helped with the laboratory work. Seismic indicators of gas hydrate and associated gas in the Ulleung Basin, East Sea (Sea of Japan) and implications of heat fluxes derived from bottom-simulating reflector depths. Organic carbon accumulation and sulfate reduction rates in slope and basin sediments of the Ulleung Basin, East/Japan Sea.

Approximately 90% of the Huanghe sediments originate from this plateau, located along the middle course of the river and occupying about half of its drainage basin (Ren and Shi1986; Zhang et al. 1990b). In contrast, Chinese river sediments show a convex trend in terms of atomic number, with enrichment in middle REEs (Nd, Sm and Eu) and depletion in other LREEs and HREEs. Xu K, Milliman JD (2009) Seasonal changes of sediment discharge from the Yangtze River before and after the closure of the Three Gorges Dam.

Much of the coastline consists of steep sea cliffs composed of soft, reddish-brown soil and/or deeply weathered granite gneiss. The horizontal distance of sea rock retreat between April 2001 and March 2002 varied from 0.5 to 2 m. The coastlines of the Haeunri area derived from aerial photographs (Fig. 4) show that the 1990 coastline was on land of the 1976 coastline, indicating a retreat.