Original Article

Econ. Environ. Geol. 2016; 49(3): 181-191

Published online June 30, 2016

https://doi.org/10.9719/EEG.2016.49.3.181

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Risk Analyses from Eruption History and Eruptive Volumes of the Volcanic Rocks in Ulleung Island, East Sea

Sang Koo Hwang* and In Hwa Jo

Department of Earth and Environmental Sciences, Andong National University, Andong 760-749, Korea

Correspondence to : hwangsk@anu.ac.kr

Received: May 17, 2016; Revised: June 15, 2016; Accepted: June 16, 2016

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

We estimate the eruption history and magmatic eruptive volumes of each rock units to evaluate the volcanic eruption scale and volcanic hazard of the Ulleung Island. Especially, Maljandeung Tuff represents about 19~5.6 ka B.P. from 14C dating, and Albong Trachyandesite, about 0.005 Ma from K-Ar dating in recent age dating data. These ages reveal evidences of volcanic activities within the last 10,000 years, indicating that the Ulleung Island can classify as an active volcano with possibility of volcanic eruption near future. Accumulated DRE-corrected eruptive volume is calculated at 40.80 km3, within only the island. The calculated volumes of each units are 3.71 km3 in Sataegam Tuff, and 0.10 km3 in Maljandeung Tuff but 12.39 km3 in accounting the distal and medial part extended into southwestern Japan. Volcanic explosivity indices range 1 to 6, estimating from the volumes of each pyroclastic deposits. The colossal explosivity indices are 5 in Sataegam Tuff, and 6 in Maljandeung Tuff in accounting the distal and medial part. Therefore, it is necessary for appropriate researches regarding possibility of volcanic eruption of the island, and establishment system of the evaluation and preparation for volcanic hazard based on the researches is required.

Keywords eruption history, age dating, active volcano, magmatic eruptive volume, volcanic explosivity index, volcanic hazard

울릉도 화산암류의 분화이력과 분출량에 따른 위험도 분석

황상구*·조인화

안동대학교 지구환경과학과

요 약

Article

Original Article

Econ. Environ. Geol. 2016; 49(3): 181-191

Published online June 30, 2016 https://doi.org/10.9719/EEG.2016.49.3.181

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Risk Analyses from Eruption History and Eruptive Volumes of the Volcanic Rocks in Ulleung Island, East Sea

Sang Koo Hwang* and In Hwa Jo

Department of Earth and Environmental Sciences, Andong National University, Andong 760-749, Korea

Correspondence to:hwangsk@anu.ac.kr

Received: May 17, 2016; Revised: June 15, 2016; Accepted: June 16, 2016

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

We estimate the eruption history and magmatic eruptive volumes of each rock units to evaluate the volcanic eruption scale and volcanic hazard of the Ulleung Island. Especially, Maljandeung Tuff represents about 19~5.6 ka B.P. from 14C dating, and Albong Trachyandesite, about 0.005 Ma from K-Ar dating in recent age dating data. These ages reveal evidences of volcanic activities within the last 10,000 years, indicating that the Ulleung Island can classify as an active volcano with possibility of volcanic eruption near future. Accumulated DRE-corrected eruptive volume is calculated at 40.80 km3, within only the island. The calculated volumes of each units are 3.71 km3 in Sataegam Tuff, and 0.10 km3 in Maljandeung Tuff but 12.39 km3 in accounting the distal and medial part extended into southwestern Japan. Volcanic explosivity indices range 1 to 6, estimating from the volumes of each pyroclastic deposits. The colossal explosivity indices are 5 in Sataegam Tuff, and 6 in Maljandeung Tuff in accounting the distal and medial part. Therefore, it is necessary for appropriate researches regarding possibility of volcanic eruption of the island, and establishment system of the evaluation and preparation for volcanic hazard based on the researches is required.

Keywords eruption history, age dating, active volcano, magmatic eruptive volume, volcanic explosivity index, volcanic hazard

울릉도 화산암류의 분화이력과 분출량에 따른 위험도 분석

황상구*·조인화

안동대학교 지구환경과학과

Received: May 17, 2016; Revised: June 15, 2016; Accepted: June 16, 2016

요 약

    KSEEG
    Apr 30, 2024 Vol.57 No.2, pp. 107~280

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