地震地质 ›› 2017, Vol. 39 ›› Issue (2): 423-435.DOI: 10.3969/j.issn.0253-4967.2017.02.011

• 问题讨论 • 上一篇    

吉林龙岗火山群金龙顶子火山机构及灾害区划

赵波1, 张焘2, 徐德斌3, 白志达3   

  1. 1. 中国地震局地质研究所, 活动构造与火山重点实验室, 北京 100029;
    2. 美国宝石研究所, 卡尔斯巴德 92008;
    3. 中国地质大学(北京), 北京 100083
  • 收稿日期:2016-02-09 修回日期:2016-07-13 出版日期:2017-04-20 发布日期:2017-05-25
  • 作者简介:赵波,男,1983年生,2010年于中国地震局地质研究所获构造物理学博士学位,助理研究员,主要从事火山地质和火山碎屑岩石学研究,电话:010-62009135,E-mail:zhaobo@ies.ac.cn。
  • 基金资助:
    国家自然科学基金(41402299)与中国地震局地质研究所基本科研业务专项(IGCEA1516)共同资助

PRELIMINARY VOLCANIC HAZARD ZONATION IN JINLONGDINGZI VOLCANO, LONGANG VOLCANO AREA, JILIN PROVINCE, CHINA

ZHAO Bo1, ZHANG Tao2, XU De-bin3, BAI Zhi-da3   

  1. 1. Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
    2. Gemological Institute of America, Carlsbad 92008, America;
    3. China University of Geoscience, Beijing 100083, China
  • Received:2016-02-09 Revised:2016-07-13 Online:2017-04-20 Published:2017-05-25

摘要: 金龙顶子火山是吉林龙岗火山群全新世喷发规模最大的火山。前人研究表明,该地区火山活动活跃,具有潜在喷发危险。通过对金龙顶子火山机构的解析,确定历史火山灾害类型主要有火山溅落灾害、空降火山渣灾害和熔岩流灾害等。在限定金龙顶子火山未来再次喷发类型和规模与上次相当的条件下,火山溅落灾害局限于火口2km范围内;空降火山渣灾害,距火口2~9km为高危险区,9~14km为中危险区,14~18km为低危险区;使用Volcflow模型对熔岩流进行模拟,结果表明熔岩流主要分布在金龙顶子火山周围低洼地带。

关键词: 龙岗火山群, 金龙顶子火山, 火山机构, 火山灾害区划

Abstract: Longgang volcano cluster is 150km away from the Tianchi volcano, located in Jingyu and Huinan Counties, Jilin Province, China. It had a long active history and produced hundreds of volcanoes. The latest and largest eruption occurred between 1 500 and 1 600 years ago by Jinlongdingzi(JLDZ)volcano which had several eruptions in the history. This paper discusses the volcanic hazard types, and using the numerical simulations of lava flow obtained with the Volcflow model, proposes the hazard zonation of JLDZ volcano area. JLDZ volcano eruption type is sub-plinian, which produced a great mass of tephra fallout, covering an area of 260km2. The major types of volcanic hazards in JLDZ area are lava flow, tephra fallout and spatter deposits. Volcflow is developed by Kelfoun for the simulation of volcanic flows. The result of Volcflow shows that the flows are on the both sides of the previous lava flows which are low-lying areas now. According to the physical parameters of historical eruption and Volcflow, we propose the preliminary volcanic hazard zonation in JLDZ area. The air fall deposits are the most dangerous product in JLDZ. The highly dangerous region of spatter deposits is limited to a radius of about 2km around the volcano. The high risk area of tephra fallout is between 2km to 9km around the volcano, and between 9km to 14km is the moderate risk area. Out of 14km, it is the low risk area. Lava flow is controlled by topography. From Jinchuan Town to Houhe Village near the volcano is the low-lying area. If the volcano erupts, these areas will be in danger.

Key words: Longgang volcano area, Jinlongdingzi volcano, volcanic edifice, volcanic hazard zonation

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