气候变化领域集成服务门户(CCPortal): The focus thermal study around the spreading center of southwestern Okinawa trough

CCPortal

DOI	10.1016/j.tecto.2020.228649
	The focus thermal study around the spreading center of southwestern Okinawa trough
	Chen L.; Chiang H.-T.; Wu J.-N.; Chiao L.-Y.; Shyu C.-T.; Liu C.-S.; Wang Y.; Chen S.-C.
发表日期	2020
ISSN	00401951
卷号	796
英文摘要	Voluminous hydrothermal systems are corresponding to the heat flow anomaly discovered from previous geophysical surveys in the Southern Okinawa Trough (SOT), which is an area with a high sedimentation rate supplied by the East China Sea shelf and the island of Taiwan. Our latest fifteen field measurements around the Geolin Mound (GLM) (24° 36.6 ‘N, 122° 53’E) are located at a sedimentary basin west of the Yonaguni Rift, which is nearby the southwestern tip of a NE-SW trending volcano trail in the SOT. The heat flow results illustrate a concentric decrease from 31,477 to 180 mW/m2 in a 1-km radius around the GLM, evidently proving the focus fluid migration along the major fluid conduit. The ultrahigh temperature observations revealed the existence of magmatic components in shallow sediments. Combining the subsurface profiles with the temperature fields around the GLM, a 0.16-km2 acoustic blanking area of the G1 fluid conduit was recognized from the chirp sonar image and numerous interpreted igneous reflections with fluids related features from seismic profiles. As a result, we proposed a conceptual model, which simultaneously illustrates the hydrothermal circulation pattern from the previous general surveys and the enormous thermal anomaly from current detailed measurements. The sill-to-sill feeding sedimentary basin of the GLM is capable of demonstrating the enormous thermal anomaly around the spreading center of the SOT and appropriately represents the potential hydrothermal discharge and recharge by heat flow distribution around the GLM. © 2020 Elsevier B.V.
关键词	Geolin mound Heat flow Hydrothermal vents South Okinawa trough
英文关键词	Sedimentology; Settling tanks; Surveys; Geophysical surveys; Heat flow distribution; Hydrothermal circulation; Hydrothermal discharge; Hydrothermal system; Magmatic component; Sedimentation rates; Ultrahigh temperature; Heat transfer; heat flow; hydrothermal system; hydrothermal vent; sedimentary basin; spreading center; East China Sea; Okinawa Trough; Pacific Ocean
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207727
作者单位	Marine Science and Information Research Center, National Academy of Marine Research, Ocean Affair Council, Taiwan; Ocean Center, National Taiwan University, Taiwan; Center for General Education, National Ilan University, Taiwan; Scirpps Institution of Oceanography, University of California San Diego, United States; Institute of Oceanography, National Taiwan University, Taiwan; Central Geological Survey, MOEA, United States
推荐引用方式 GB/T 7714	Chen L.,Chiang H.-T.,Wu J.-N.,et al. The focus thermal study around the spreading center of southwestern Okinawa trough[J],2020,796.
APA	Chen L..,Chiang H.-T..,Wu J.-N..,Chiao L.-Y..,Shyu C.-T..,...&Chen S.-C..(2020).The focus thermal study around the spreading center of southwestern Okinawa trough.Tectonophysics,796.
MLA	Chen L.,et al."The focus thermal study around the spreading center of southwestern Okinawa trough".Tectonophysics 796(2020).