초록 열기/닫기 버튼
대한민국 동해안의 강원도 고성군에 위치한 화진포에서 채취한 코어를 이용하여, 방사성탄소 연대측정과 규조분석을 실시하여, 그 결과로부터 화진포와 화진포 주변의 퇴적환경을 복원하고, 홀로세 동안의 해수면 변동을 추측하였다. 코어는 내호와 외호에서 각각 한 지점씩 채취하여, HJP01과 HJP02로 명명하였다. HJP01은 지류의 영향을 받는 삼각주 퇴적환경으로 하부에서 상부로 갈수록 담수종과 담수-기수종의 산출이 증가하고 있다. HJP02는 해수면 변동의 영향을 직접적으로 받고 있다. HJP02 지점에서는 약 4,000년 전 시기에는 석호 환경이었으며, 약 3,200년 전부터 해퇴가 시작되었으며, 약 2,500년 전~1,450년 전의 기간에는 호수 환경으로부터 완전히 분리되어 규조의 산출이 극히 드물었으며, 약 1,450년 전부터는 담수의 소택지 환경이었을 것이라 예상된다.
Lake Hwajinpo is located on the eastern coast of Korea. This study reconstructed sedimentary environment of Hwajinpo and its surroundings and presumed sea-level changes during the Holocene using radiocarbon dating and diatom analysis from core samples. The undisturbed core samples were taken at the inner lake and the outer lake of Lake Hwajinpo, named HJP01 and HJP02 respectively. HJP01 is located at the delta margin by the tributary sedimentation. The numbers of freshwater and freshwater-brackish water species was increased gradually from the bottom to upper of the core, according to the expansion of the delta. The relative marine regression, the environmental change from high salinity environment(marie-brackish water) to low salinity(freshwater) was observed in the core. In contrast to HJP01 site, HJP02 site is affected by the sea-level change directly. According to the result of diatom analysis, the brackish lagoon environment was formed surrounding ca.4,000yrBP. However, the relative marine regression started since about 3,200yrBP because the number of marine and brackish water species reduced gradually. After then the lake environment was presumably disappeared and the HJP02 site was completely dried up since 2,500yrBP through 1,450yrBP, because the diatom frequency of this period became very poor. Since 1,450yrBP, HJP02 recovered aquatic environment, however it was separated from lake water from Lake Hwajinpo by the coastal ridge along the lake, and has continuosly deposited peat bogs till now.
키워드열기/닫기 버튼
Hwajinpo, diatom analysis, Holocene, environmental change
