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dc.contributor.author
Scott, Samuel W.
dc.contributor.author
Driesner, Thomas
dc.date.accessioned
2018-08-29T07:44:38Z
dc.date.available
2018-08-29T04:52:26Z
dc.date.available
2018-08-29T07:44:38Z
dc.date.issued
2018
dc.identifier.issn
1468-8115
dc.identifier.issn
1468-8123
dc.identifier.other
10.1155/2018/6957306
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/285250
dc.identifier.doi
10.3929/ethz-b-000285250
dc.description.abstract
It has long been recognized that quartz precipitation from circulating hydrothermal fluids may reduce porosity and permeability near intrusions. However, the magnitude of permeability changes and potential feedbacks between flow, heat transfer, and quartz precipitation/dissolution remain largely unquantified. Here, we present numerical simulations of fluid convection around upper crustal intrusions which explicitly incorporate the feedback between quartz solubility and rock permeability. As groundwater is heated to ~350°C, silica dissolves from the host rock, increasing porosity and permeability. Further heating to supercritical conditions leads to intensive quartz precipitation and consequent permeability reduction. The initial host rock permeability and porosity are found to be main controls on the magnitude and timescales of permeability changes. While the permeability changes induced by quartz precipitation are moderate in host rocks with a primary porosity ≥ 0.05, quartz precipitation may reduce rock permeability by more than an order of magnitude in host rocks with a primary porosity of 0.025. Zones of quartz precipitation transiently change locations as the intrusion cools, thereby limiting the clogging effect, except for host rocks with low initial porosity. This permeability reduction occurs in timescales of hundreds of years in host rocks with initial high permeability and thousands of years in host rocks with intermediate permeability.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Permeability Changes Resulting from Quartz Precipitation and Dissolution around Upper Crustal Intrusions
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2018-07-31
ethz.journal.title
Geofluids
ethz.journal.volume
2018
en_US
ethz.pages.start
6957306
en_US
ethz.size
20 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03417 - Heinrich, Christoph A. (emeritus) / Heinrich, Christoph A. (emeritus)
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03417 - Heinrich, Christoph A. (emeritus) / Heinrich, Christoph A. (emeritus)::08822 - Driesner, Thomas (Tit.-Prof.)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03417 - Heinrich, Christoph A. (emeritus) / Heinrich, Christoph A. (emeritus)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03417 - Heinrich, Christoph A. (emeritus) / Heinrich, Christoph A. (emeritus)::08822 - Driesner, Thomas (Tit.-Prof.)
ethz.date.deposited
2018-08-29T04:53:07Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-08-29T07:44:57Z
ethz.rosetta.lastUpdated
2019-02-03T05:18:55Z
ethz.rosetta.versionExported
true
ethz.COinS
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