The formation of explosive volcanos at the circum-Pacific convergent margin during the last century

IOCAS-IR

	The formation of explosive volcanos at the circum-Pacific convergent margin during the last century
	Fanfan TIAN ; Kun WANG; Guozhi XIE ; Weidong SUN
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2023-01-15
出版年	2023
卷号	v.41 期号:01 页码:77-85
文献类型	CNKI期刊论文
摘要	The circum-Pacific convergent margin is known as "the Ring of Fire",with abundant volcano eruptions.Large eruptions are rare but very disastrous.It remains obscure how are large explosive volcanos formed and where are the danger zones.Three largest eruptions since 1900,the Hunga Tonga-Hunga Ha'apai,the Mt.Pinatubo,and the Novarupta were found to be associated with subductions of volatile-rich sediments and located close to slab windows.Among them,the Hunga Tonga-Hunga Ha'apai is close to subducting seamount chains;the Mt.Pinatubo is right next to subducting fossil ridges.Both seamount chains and fossil ridges have water depths much shallower than the carbonate compensation depths(CCD) in the Pacific Ocean.Seismic image shows that a seamount is subducting towards the Novarupta volcano.Subduction of volatile-rich sediments and a slab window nearby are the two most important favorable conditions for catastrophic eruptions.Slab windows expose the mantle wedge to the hot asthenosphere,which increases the temperature and dramatically promotes the partial melting of the carbonate-fluxed domains,forming volatile-rich magmas that powered explosive eruptions.
关键词	large explosive volcanos subducting seamount chains volatile-rich sediments slab windows Tonga
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A011;A012;
CNKI专题名称	地质学;地球物理学;
分类号	P317
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA22050103) ; the Taishan Scholar Program of Shandong (No. ts201712075)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187211
专题	中国科学院海洋研究所
作者单位	1.CenterofDeepSeaResearch,CenterofOceanMegaScience,InstituteofOceanology,ChineseAcademyofSciences 2.Deep-SeaMultidisciplinaryResearchCenter,LaoshanLaboratory 3.UniversityofChineseAcademyofSciences
推荐引用方式 GB/T 7714	Fanfan TIAN,Kun WANG,Guozhi XIE,et al. The formation of explosive volcanos at the circum-Pacific convergent margin during the last century. 2023.