冲绳海槽中部的火山口

英文篇名：PRELIMINARY STUDY ON VOLCANIC CRATER IN THE MIDDLE OKINAWA TROUGH
中文刊名：海洋地质与第四纪地质
英文刊名：Marine Geology & Quaternary Geology
作者：曾志刚 ; 陈丽蓉
英文作者：ZENG Zhi-gang~1 CHEN Li-rong~1 (Key Laboratory of Marine Geology and Environment ; Institute of Oceanology ; Chinese Academy of Sciences ; Qingdao 266071 ; China)
中文关键词：沉积物 ; 浮岩 ; 磁铁矿 ; 火山口 ; 冲绳海槽
英文关键词：sediment ; pumice ; magnetite ; volcanic crater ; Okinawa Trough
出版日期：2008-06-28
机构：中国科学院海洋研究所,海洋地质与环境重点实验室;
年：2008
期：03
出版单位：海洋地质与第四纪地质

摘要

冲绳海槽位于中国东海大陆架的东部,与东海陆架相连,是一个新生的孤后盆地,海底火山活动和地震频繁,断裂体系十分发育,沉积了十分丰富的火山碎屑沉积物,根据海底沉积物中的浮岩与磁铁矿含量变化,结合水深资料推测了海底火山口的位置,结果表明Z 14—5测站(27°18′N、127°12′E)附近是一个火山口。
The Okinawa Trough is a back-arc basin located in the eastern East China Sea shelf,and it is thought to be in a nascent rifting stage of back-arc spreading.In the Okinawa Trough,volcanic activities and earthquakes occur frequently,many faults are in the Trough,and also there is abundant pyroclastic sediment.On the basis of the content of pumice and magnetite in marine sediments and combining with the data of water depth,the study result shows that,there is a volcanic crater near core Z 14-5(27°18′N.127°12′E).

引文

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