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Rock fracture closing moderated by pressure solution
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Engineering.ORCID iD: 0000-0003-2353-6505
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Engineering.ORCID iD: 0000-0001-6801-9208
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Engineering.ORCID iD: 0000-0001-8241-2225
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Engineering.
2015 (English)In: Future Communication Technology and Engineering - Proceedings of the 2014 International Conference on Future Communication Technology and Engineering, FCTE 2014, CRC Press/Balkema , 2015, 269-275 p.Conference paper, Published paper (Refereed)
Resource type
Text
Abstract [en]

Fracture apertures may decrease or increase by different mechanical and chemical mechanisms when the fractures are subject to stress. A model is presented to describe fracture closure/opening that accommodates pressure dissolution at contacting asperities as well as free-face dissolution/precipitation at free faces of the fracture and of the rock matrix. The derived analytical model accounts for the fact that dissolved minerals carried by flowing water along the fracture can not only diffuse into and out of the adjacent rock matrix but also at first diffuse into the stagnant water zone existing in part of the fracture plane and then from there into and out of the rock matrix adjacent to it. The analytical solution is used to study fracture closure/opening rate in a pseudo steady state, PSS, procedure. This simple model allows us to gain some insights into which processes and mechanisms have the larger impact on the fracture aperture under different circumstances.

Place, publisher, year, edition, pages
CRC Press/Balkema , 2015. 269-275 p.
Keyword [en]
Dissolution, Rocks, Stresses, Chemical mechanism, Contacting asperities, Fracture apertures, Fracture closure, Free-face dissolution/precipitation, Pressure dissolution, Pressure solution, Pseudo steady state, Fracture
National Category
Geochemistry
Identifiers
URN: urn:nbn:se:kth:diva-181595Scopus ID: 2-s2.0-84951836365ISBN: 9781138027770 (print)OAI: oai:DiVA.org:kth-181595DiVA: diva2:912874
Conference
International Conference on Future Communication Technology and Engineering, FCTE 2014, 16 November 2014 through 17 November 2014
Note

QC 20160318

Available from: 2016-03-18 Created: 2016-02-02 Last updated: 2016-03-18Bibliographically approved

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