Tuff cones and tuff rings, and their stratigraphic relationships on the western side of Cheju island, Korea

• 발행기관: 대한자원환경지질학회
• 저자명: Sang Koo Hwang(黃尙九) Jae Ha Hwang(黃載河) Dong Hak Kim(金東鶴)M.F. Howells
• 간행물 정보: 『자원환경지질』24권 4호, 399~408쪽, 전체 10쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1991.08.30

국문 초록

濟州道 西部 海岸地帶에는 여러개의 凝灰丘와 凝灰環이 分布한다. 이들은 landform, bedform, 粒度와 分級 등에 의하면 마그마에 外部물이 流入되므로서 써쩨이언분출을 할때 發生하는 基底써지와 혹은 슬러리로부터 퇴적된 産物이며, 周圍의 臺地狀 玄武岩을 기준하여 先後期의 2개의 群으로 나뉘어진다. 唐山峰, 簞山, 山房山과 和順의 것들은 이들의 distal limb이 臺地狀 玄武岩에 덮혀 있어 先期임이 명확하며, 반면 水月峰과 松岳山 凝灰環은 玄武岩臺地 위에서 이의 distal limb이 수 km 뻗쳐 있어 後期임이 명확하다. 또한 凝灰丘 및 凝灰環은 그 內部에 海樓貝을 함유하며, 그 周圍에 再移動 凝灰岩, 牽引海濱堆積層과 新陽里層이 퇴적되어 있고 沿岸丘가 형성되어 있는 등의 證拳들에 의하면 海水가 써쩨이언분출에 直間接으로 流入되었음을 시사한다.

영문 초록

There are several tuff cones and tuff rings, now only apparent on the western shoreline in Cheju Island. The observation of their landform, bedform, particle size and sorting reveals that these deposits are mainly emplaced by base surges and/or slurries originating from Surtseyan eruption which is attributed to explosive hydrovolcanism influenced by interaction of magma with external water. These are subdivided into two groups based on the plateau basalt. It is recognized that the distal limb of early tuff cones and ring at Dangsanbong, Dansan, Sanbangsan and Hwasun (lower group) are overlain by plateau basalt, on which later tuff rigns at Suwolbong and Songaksan(upper group) further extend the distal limb from each vent. The tuff cones and tuff rings are closely associated with the evidences which shelly fragments are comprised within them, and reworked tuffs, raised beach deposits, Sinyangri formation and littoral cones are deposited around them. The evidences suggest that the Surtseyan eruption resulted from direct or indirect interaction of magma with sea water.

목차

ABSTRACT

INTRODUCTION

TUFF CONES AND TUFF RINGS

RELATIONSHIP OF TUFF RING/CONE TO ASSOCIATED SEDIMENTS

RAISED BEACH DEPOSITS AND SAND DUNES

DISCUSSION AND CONCLUSION

REFERENCES

요약