摘要
长白山火山位于中朝边界,由数以百计的火山锥和广袤的熔岩台地组成,是一个庞大的火山群,总面积达12 000km2;它有天池、望天鹅、炮台山3个喷发中心和以基性玄武岩岩流造盾,中性粗面岩熔岩筑锥,酸性碱流岩质火山碎屑、火山灰等随后空降堆积3个主要火山喷发旋回,构成板内巨型层状复式火山。自中新世以来有10个火山幕,近代历史期间仍有过多次喷发,现为处于休眠状态的活火山;该火山受东北亚板块体系制约,与太平洋板块俯冲和东亚大陆裂谷系密切相关。目前适逢地质构造的活动期和千年大喷发、百年小喷发周期的节点,存在着潜在的再喷发危险。
The Mt. Changbai volcano lies in the boundary of China and DPR Korea（ Democratic People＇s Republic of Korea）,covers an area of 12,000 km^2 and is characterized by hundreds of volcanic cones and vast lava tableland,consisting predominantly of Wangtian＇e volcano in China,Tianchi volcano on the China-DPR Korea border,and Namphothe volcano in DPR Korea. Compositionally,all volcanisms appear to share a common multi-stage magma evolution that involved the early building shield of trachy basaltic magma and followed by the building cone of trachy and esitic-trachytic magma,and finally the eruption of pantellerite and pyroclastic deposits. The initiation of volcanic activities in the Mt. Changbai area occurred in the Miocene period. During the period of recent history the Mt. Changbai volcano has had several major eruptions. The Cenozoic volcanism in Mt. Changbai has been controlled by Northeast Asia plate system,which is closely related with the subduction of the western Pacific Plate and the East Asian continental rift. The Mt. Changbai volcano is dormant currently and the dormant period has been hundreds of years,which is consistent with the volcanic eruption cycle,implying the potential of a future eruption.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2015年第4期710-723,共14页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金项目(41272369
41472320)
关键词
长白山
天池
望天鹅
炮台山
Mt.Changbai
Tianchi volcano
Wangtian＇e volcano
Namphothe volcano
