吉林长白山天池第四纪火山旋回性喷发与冰川作用的耦合关系  

Coupling relation between cyclic eruption of Quaternary volcano and ancient glacier in Tianchi,Changbai Mts

作　　者：王照波 王江月[4] 李宝杰 WANG Zhao-bo;WANG Jiang-yue;LI Bao-jie(Laboratory of Gold Mineralization Process and Resource Utilization,Ministry of Natural Resources,Jinan 250013,China;Yimeng National Geological Park Management Office,Linyi 273304,China;Shandong Compass Mineral Exploration co.,Ltd,Linyi 276006,China;College of Geography and Travel,Qufu Normal University,Rizhao 276800,China)

机构地区：[1]自然资源部金矿成矿过程与资源利用重点实验室,济南250013 [2]沂蒙山国家地质公园管理局,临沂273304 [3]山东指南针矿产勘查有限公司,临沂276006 [4]曲阜师范大学地理与旅游学院,日照276800

出　　处：《华东地质》2020年第2期108-115,共8页East China Geology

基　　金：自然资源部金矿成矿过程与资源利用重点实验室“山东金刚石成矿规律与侵位时代研究(编号:201403)”;山东指南针矿产勘查有限公司“东亚冷槽探索计划(编号:20180101)”项目联合资助。

摘　　要：长白山天池火山喷发活动贯穿整个第四纪,旋回性明显,发育良好的冰川遗迹,为火山喷发与冰川作用的耦合性研究提供了有利条件。文章通过对长白山天池第四纪火山喷发旋回及火山岩分布特征研究,收集火山喷发年代学与冰期-间冰期旋回年代学数据,并利用卫片解译了火山喷发与冰蚀U谷的关系。在年代学数据的约束下,根据天池火山锥体周边广泛发育的U谷遗迹,将研究区冰川作用分为3个冰期:锦江冰期、漫江冰期和二道白河冰期,分别对应中国东部鄱阳冰期、大姑冰期和庐山冰期。长白山天池火山造锥阶段喷发形成的白头山组3个阶段(Ⅰ、Ⅱ、Ⅲ),与上述3个冰期具有良好的耦合关系。天池内部冰斗为白头山冰期(即中国东部东山冰期,MIS4)产物,经黑风口冰期与气象站冰期(即中国东部蒙山冰期,MIS2)、全新世冰川作用及火山作用的双重改造,其基本特征保存至今。长白山天池冰盖消融导致的释压反弹,可能诱发了天池火山呈旋回性喷发。Volcanic magma eruption in Tianchi of Changbai Mountain run through the whole Quaternary period.It is characterzied by distinct eruption cycle and well developed glacier relics,providing beneficial conditions for the study of coupling relation between volcanic eruption and glaciation.This paper analyzed eruption cyclic of Quaternary volcanos and distribution characteristics of volcanic rocks using collecting the chronological statistic data of volcanic eruptions and the cycle of ice age and interglacial,along with superposition relationship between volcanic eruption and ice erosion U-shaped valley.Based on the chrological data and the well-developed U-shaped valey around Tianchi volcanic cone,the glaciaton can be divided into three ages:Jingjiang Ice Age,Manjiang Ice Age and Erdaobaihe Ice Age,in response to Poyang Ice Age,Dagu Ice Age and Lushan Ice Age in the eastern of China,respectively.Eruption of Tianchi volcano in Changbai Mts formed three stages of Baitoushan Formation(Ⅰ.Ⅱ.Ⅲ),which couple well with three Ice Ages mentioned above.The ice cirque in Tianchi formed during Baitoushan Ice Ages(i.e.Dongshan Ice Age,MIS4,in the eastern of China).Even experiencing double transformation during Heifengkou Ice Age and Qixiangzhan Ice Age(Mengshan Ice Age,MIS2,in the eastern of China),and Holocene glaciation and volcanism,its basic features have been preserved until today.Ice sheet melting of Changbai Mts resulted in rebounding of pressure release,which may induce the cyclic eruption of Tianchi volcano.

关 键 词：火山喷发 冰川作用 U谷 长白山天池 释压反弹 

分 类 号：P343.6[天文地球—水文科学]