摘要
长白山火山历史时期规模最大的火山喷发发生在1199～1200年。这次大爆发分为两次普林尼（Plinian）式喷发：第一次（早期）喷发称赤峰期，第二次（晚期）喷发称园池期。赤峰期喷发模式为：普林尼式喷发柱（赤峰空落浮岩层）-火山碎屑流（长白火山碎屑流层）-火山泥流（二道白河火山泥流层），主要由火山碎屑流诱发火山泥流；园池期火山喷发模式为：普林尼式喷发柱（园池空落浮岩火山灰层）-火山碎屑流（冰场火山碎屑流层）。两次普林尼式喷发空落火山碎屑物总量约120km^3，长白火山碎屑流层总量约8km^3，冰场火山碎屑流层总量约0．5km^3，火山泥流堆积总量约为2km^3。主要论述了这次大爆发的火山喷发碎屑堆积物的层序和分布。
The recorded 1199～1200 A.D. eruption is the largest among all the Changbaishan volcano eruptions in history. It can be subdivided into two phases of Plinian eruption, the first is named the Chifeng phase and the second the Yuanchi phase. The eruptive pattern of the Chifeng phase is. Plinian column （the Chifeng pumice fall deposits） → pyroclastic flow （the Changbai pyroclastic flow deposits） → lahar （the Erdaobaihe lahar deposits） mainly triggerd by pyroclastic flow. The eruptive pattern of the Yuanchi phase is from Plinian column （the Yuanchi pumice and ash fall deposits） → pyroclastic flow （the Bingchang pyroclastic flow deposits）. The total volume of both the first and the second Plinian falls has been estimated at about 120 km^3. The bulk volume of the Changbai pyroclastic flow deposits was estimated about 8 km^3; that of the Bingchang pyroclastic flow deposits about 0. 5 km^3 and of the Erdaobaihe lahar deposit about 2 km^3. The author deals with mainly the sequence and distribution of the pyroclastic deposits of the 800 a. B. P. eruptions.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2006年第3期313-318,共6页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(49372127
49772140)
国家自然科学基金国际合作项目(49910130801)
