气候变化领域集成服务门户(CCPortal): Numerical Simulation-Based Clarification of a Fluid-Flow System in a Seafloor Hydrothermal Vent Area in the Middle Okinawa Trough

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DOI	10.1029/2020GL088681
	Numerical Simulation-Based Clarification of a Fluid-Flow System in a Seafloor Hydrothermal Vent Area in the Middle Okinawa Trough
	Tomita S.A.; Koike K.; Goto T.; Suzuki K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Despite many studies on seafloor hydrothermal systems conducted to date, the generation mechanism of seafloor massive sulfide (SMS) deposits is not yet fully understood. To elucidate this mechanism, this study clarifies the three-dimensional regional temperature distribution and fluid flow of a seafloor hydrothermal system of the Iheya North Knoll, middle Okinawa Trough. Lateral flow and boiling of hydrothermal fluids below a caprock were the main features found by the simulation. A caprock formation generated by anhydrite precipitation and hydrothermal alteration is the most plausible cause of these features, because caprocks can increase the temperature and induce boiling of fluids by preventing seawater inflow. Such a formation also gradually makes the top of the conduit less permeable; thus, lateral flow occurs. Consequently, vapor-rich hydrothermal fluids poor in metals are discharged from vents as white smokers, whereas liquid-dominated hydrothermal fluids rich in metals flow laterally below the caprocks, forming subseafloor SMS deposits. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Clay alteration; Deposits; Hot springs; Smoke; Sulfate minerals; Generation mechanism; Hydrothermal alterations; Hydrothermal fluids; Hydrothermal vent; Lateral Flow; Okinawa Trough; Seafloor hydrothermal systems; Seafloor massive sulfides; Flow of fluids; anhydrite; cap rock; fluid flow; hydrothermal alteration; hydrothermal vent; massive sulfide; numerical method; ore deposit; precipitation (chemistry); seafloor; seawater; East China Sea; Okinawa Trough; Pacific Ocean; Calluna vulgaris
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/169575
作者单位	Department of Urban Management, Graduate School of Engineering, Kyoto University, Kyoto, Japan; Now at Graduate School of Life Science, University of HyogoHyogo, Japan; Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Kanagawa, Japan
推荐引用方式 GB/T 7714	Tomita S.A.,Koike K.,Goto T.,et al. Numerical Simulation-Based Clarification of a Fluid-Flow System in a Seafloor Hydrothermal Vent Area in the Middle Okinawa Trough[J],2020,47(20).
APA	Tomita S.A.,Koike K.,Goto T.,&Suzuki K..(2020).Numerical Simulation-Based Clarification of a Fluid-Flow System in a Seafloor Hydrothermal Vent Area in the Middle Okinawa Trough.Geophysical Research Letters,47(20).
MLA	Tomita S.A.,et al."Numerical Simulation-Based Clarification of a Fluid-Flow System in a Seafloor Hydrothermal Vent Area in the Middle Okinawa Trough".Geophysical Research Letters 47.20(2020).