It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients

Groundwater flow beneath the oceans plays an important role for cooling the earth’s crust and geochemical cycles, yet it remains an understudied subject in hydrogeology. This contribution focuses on the circulation of seawater through basalt covered by deep-sea sediments in the equatorial northeast...

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Main Authors:	Desens A., Post V.E.A., Houben G.J., Kuhn T., Walther M., Graf Thomas
Format:	Article
Language:	English
Published:	EDP Sciences 2018-01-01
Series:	E3S Web of Conferences
Online Access:	https://doi.org/10.1051/e3sconf/20185400008

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spelling	doaj-5b6c806c63704f4a823debb920902d032021-03-02T10:10:44ZengEDP SciencesE3S Web of Conferences2267-12422018-01-01540000810.1051/e3sconf/20185400008e3sconf_swim2018_00008It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradientsDesens A.0Post V.E.A.1Houben G.J.2Kuhn T.3Walther M.Graf Thomas4BGRBGRBGRBGRLeibniz Universität Hannover, Institute of Fluid Mechanics and Environmental Physics in Civil EngineeringGroundwater flow beneath the oceans plays an important role for cooling the earth’s crust and geochemical cycles, yet it remains an understudied subject in hydrogeology. This contribution focuses on the circulation of seawater through basalt covered by deep-sea sediments in the equatorial northeast Pacific Ocean. Numerical model simulations are used to infer the factors controlling the flow patterns that develop between basalt outcrops. The energy to drive the flow is derived from the crustal heat flux. It is found that the sediment thickness plays a key role in determining the development of hydrothermal siphons, i.e. the flow between two adjacent seamounts where one acts as a recharge point and the other as a discharge point for seawater. Amongst the various factors tested, the outcrop width was an important factor as well.https://doi.org/10.1051/e3sconf/20185400008
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Desens A. Post V.E.A. Houben G.J. Kuhn T. Walther M. Graf Thomas
spellingShingle	Desens A. Post V.E.A. Houben G.J. Kuhn T. Walther M. Graf Thomas It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients E3S Web of Conferences
author_facet	Desens A. Post V.E.A. Houben G.J. Kuhn T. Walther M. Graf Thomas
author_sort	Desens A.
title	It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients
title_short	It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients
title_full	It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients
title_fullStr	It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients
title_full_unstemmed	It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients
title_sort	it’s hydrogeology but not as we know it: sub-seafloor groundwater flow driven by thermal gradients
publisher	EDP Sciences
series	E3S Web of Conferences
issn	2267-1242
publishDate	2018-01-01
description	Groundwater flow beneath the oceans plays an important role for cooling the earth’s crust and geochemical cycles, yet it remains an understudied subject in hydrogeology. This contribution focuses on the circulation of seawater through basalt covered by deep-sea sediments in the equatorial northeast Pacific Ocean. Numerical model simulations are used to infer the factors controlling the flow patterns that develop between basalt outcrops. The energy to drive the flow is derived from the crustal heat flux. It is found that the sediment thickness plays a key role in determining the development of hydrothermal siphons, i.e. the flow between two adjacent seamounts where one acts as a recharge point and the other as a discharge point for seawater. Amongst the various factors tested, the outcrop width was an important factor as well.
url	https://doi.org/10.1051/e3sconf/20185400008
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It’s hydrogeology but not as we know it: Sub-seafloor groundwater flow driven by thermal gradients

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