气候变化领域集成服务门户(CCPortal): Embryonic Rifting Zone Revealed by a High-Density Survey on the Southern Margin of the Southern Okinawa Trough

CCPortal

DOI	10.1029/2020GL090161
	Embryonic Rifting Zone Revealed by a High-Density Survey on the Southern Margin of the Southern Okinawa Trough
	Misawa A.; Sato M.; Furuyama S.; Chang J.-H.; Inoue T.; Arai K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Offshore northern Ishigaki-Jima Island, in the southern Okinawa Trough, offers outstanding opportunities to explore the rifting stage of a backarc system. We report the results of integrated marine geological and geophysical surveys with high-density survey lines in this area. We identify a graben bounded by normal faults and extending approximately 59 km in an ENE-WSW direction off-axis of the southern Okinawa Trough. Submarine volcanoes with active hydrothermalism and associated intrusive structures lie in the graben. Magnetic anomaly and seismicity data in and around the graben suggest the presence of relatively shallow magma acting as a heat source. All features identified in and around the graben suggest active rifting in the southern Okinawa Trough. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Offshore oil well production; Back-arc; Geophysical surveys; Heat sources; Magnetic anomalies; Normal faults; Off-axis; Okinawa Trough; Seismicity data; Surveys; embryo; geophysical survey; graben; hydrothermal activity; igneous intrusion; magma; magnetic anomaly; seismicity; submarine volcano; East China Sea; Ishigaki; Japan; Okinawa Trough; Okinawa [Ryukyu Islands]; Pacific Ocean; Ryukyu Islands; Sakishima Islands; Yaeyama Islands
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169537
作者单位	Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan; Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan; Department of Marine Resources and Energy, Tokyo University of Marine Science and Technology, Tokyo, Japan; Now at Institute of Oceanography, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Misawa A.,Sato M.,Furuyama S.,et al. Embryonic Rifting Zone Revealed by a High-Density Survey on the Southern Margin of the Southern Okinawa Trough[J],2020,47(20).
APA	Misawa A.,Sato M.,Furuyama S.,Chang J.-H.,Inoue T.,&Arai K..(2020).Embryonic Rifting Zone Revealed by a High-Density Survey on the Southern Margin of the Southern Okinawa Trough.Geophysical Research Letters,47(20).
MLA	Misawa A.,et al."Embryonic Rifting Zone Revealed by a High-Density Survey on the Southern Margin of the Southern Okinawa Trough".Geophysical Research Letters 47.20(2020).