气候变化领域集成服务门户(CCPortal): Hydrothermal Models Constrained by Fine-Scale Seismic Velocities Confirm Hydrothermal Cooling of 7

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DOI	10.1029/2020JB021612
	Hydrothermal Models Constrained by Fine-Scale Seismic Velocities Confirm Hydrothermal Cooling of 7–63 Ma South Atlantic Crust
	Kardell D.A.; Zhao Z.; Ramos E.J.; Estep J.; Christeson G.L.; Reece R.S.; Hesse M.A.
发表日期	2021
ISSN	21699313
卷号	126 期号:6
英文摘要	Although 70% of the Earth's heat loss occurs in the oceans, the nature of hydrothermal heat flow in oceanic crust is controversial. Lithospheric cooling models, heat flow measurements, and seismic experiments provide conflicting accounts on the longevity of hydrothermal systems and their efficiency at removing heat from the crust. Here we present five hydrothermal models along a crustal flowline in the western South Atlantic at ∼31°S to quantify how conductive and advective heat loss change as a function of crustal age and structure. The model sites cover crustal ages of 7–63 Ma and are collocated with planned drill sites of International Ocean Discovery Program Expeditions 390 and 393. We constrained our hydrothermal models with detailed physical property distributions that we estimated from new high-resolution seismic velocity models. The hydrothermal models yield conductive and advective heat fluxes that closely match lithospheric cooling models and conductive heat flow measurements on the seafloor, supporting a hydrothermal sealing age of ∼65 Ma. Our results also agree with global estimates of fluid volume flux into the oceans and are consistent with a previously published analysis of upper crustal seismic velocities in the study area, indicating ongoing hydrothermal activity at relatively old crustal ages. This study broadly confirms and unifies existing concepts of oceanic heat flow and its modes of transport. Moreover, it provides a regional framework of seismic velocities and modeled hydrothermal fluxes, in which future in-situ measurements can be integrated. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	full-waveform inversion; hydrothermal circulation; ocean crust; oceanic heat flow
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187081
作者单位	Jackson School of Geosciences, Institute for Geophysics, The University of Texas at Austin, Austin, TX, United States; Now at ExxonMobil Upstream Integrated Solutions, Spring, TX, United States; Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, United States; School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Department of Geology and Geophysics, Texas A&M University, College Station, TX, United States; Oden Institute for Computational Science and Engineering, The University of Texas at Austin, Austin, TX, United States
推荐引用方式 GB/T 7714	Kardell D.A.,Zhao Z.,Ramos E.J.,等. Hydrothermal Models Constrained by Fine-Scale Seismic Velocities Confirm Hydrothermal Cooling of 7–63 Ma South Atlantic Crust[J],2021,126(6).
APA	Kardell D.A..,Zhao Z..,Ramos E.J..,Estep J..,Christeson G.L..,...&Hesse M.A..(2021).Hydrothermal Models Constrained by Fine-Scale Seismic Velocities Confirm Hydrothermal Cooling of 7–63 Ma South Atlantic Crust.Journal of Geophysical Research: Solid Earth,126(6).
MLA	Kardell D.A.,et al."Hydrothermal Models Constrained by Fine-Scale Seismic Velocities Confirm Hydrothermal Cooling of 7–63 Ma South Atlantic Crust".Journal of Geophysical Research: Solid Earth 126.6(2021).