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Article: Estimating the local paleo-fluid flow velocity: New textural method and application to metasomatism

TitleEstimating the local paleo-fluid flow velocity: New textural method and application to metasomatism
Authors
KeywordsCrystal Growth
Flow Direction
Grain Scale Flow Velocity
Hydrothermal Activity
Metasomatism
Tourmaline
Issue Date2009
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl
Citation
Earth and Planetary Science Letters, 2009, v. 280 n. 1-4, p. 71-82 How to Cite?
AbstractCrystal growth driven by a flowing solution is modeled for a flow with low Reynolds number using a computational dynamic software. Considering equivalent crystallographic faces, the chemical flux is calculated along upstream and downstream faces. Upstream flux is higher compared to downstream and leads to a symmetry breakdown of the crystal shape and develops mirror symmetry parallel to the flow velocity. Moreover the ratio of these two fluxes (upstream/downstream) gives a quantitative relation between the relative crystal growth rate and the flow velocity. Thus, using an inverse method, the flow direction and velocity can be deduced by the study of the variation of the growth band thicknesses of equivalent crystallographic faces. This new method was applied to the formation of metasomatic tourmalinite associated with a leucogranite sill. The approach is complemented by a study of the chemistry of the tourmaline. In the studied case, the application of the new method gives the high fluid velocities in pores (10- 3-10- 4 m/s) during metasomatism. Equivalent Darcy velocities are estimated and discussed accounting for the major role played by the regional deformation. Finally, a two-stage tectono-hydrodynamic model is proposed for the metasomatism. The first stage is genetically linked to the sill injection, and the second is characterized by a wider event with hydrothermal flow passing along the leucogranite sills. © 2009 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/92024
ISSN
2015 Impact Factor: 4.326
2015 SCImago Journal Rankings: 3.628
ISI Accession Number ID
Funding AgencyGrant Number
CNRS
BRGM through the National Research Group on Ore Deposits2458
Funding Information:

This study has the scientific and financial support from the CNRS and BRGM through the National Research Group on Ore Deposits (GDR no. 2458, TRANSMET). The authors would like to thank the Editor Lars Stixrude, Jhon Ferry and the anonymous reviewers whose comments help to improve greatly this manuscript.

References

 

DC FieldValueLanguage
dc.contributor.authorSizaret, Sen_HK
dc.contributor.authorBranquet, Yen_HK
dc.contributor.authorGloaguen, Een_HK
dc.contributor.authorChauvet, Aen_HK
dc.contributor.authorBarbanson, Len_HK
dc.contributor.authorArbaret, Len_HK
dc.contributor.authorChen, Yen_HK
dc.date.accessioned2010-09-17T10:33:49Z-
dc.date.available2010-09-17T10:33:49Z-
dc.date.issued2009en_HK
dc.identifier.citationEarth and Planetary Science Letters, 2009, v. 280 n. 1-4, p. 71-82en_HK
dc.identifier.issn0012-821Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/92024-
dc.description.abstractCrystal growth driven by a flowing solution is modeled for a flow with low Reynolds number using a computational dynamic software. Considering equivalent crystallographic faces, the chemical flux is calculated along upstream and downstream faces. Upstream flux is higher compared to downstream and leads to a symmetry breakdown of the crystal shape and develops mirror symmetry parallel to the flow velocity. Moreover the ratio of these two fluxes (upstream/downstream) gives a quantitative relation between the relative crystal growth rate and the flow velocity. Thus, using an inverse method, the flow direction and velocity can be deduced by the study of the variation of the growth band thicknesses of equivalent crystallographic faces. This new method was applied to the formation of metasomatic tourmalinite associated with a leucogranite sill. The approach is complemented by a study of the chemistry of the tourmaline. In the studied case, the application of the new method gives the high fluid velocities in pores (10- 3-10- 4 m/s) during metasomatism. Equivalent Darcy velocities are estimated and discussed accounting for the major role played by the regional deformation. Finally, a two-stage tectono-hydrodynamic model is proposed for the metasomatism. The first stage is genetically linked to the sill injection, and the second is characterized by a wider event with hydrothermal flow passing along the leucogranite sills. © 2009 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epslen_HK
dc.relation.ispartofEarth and Planetary Science Lettersen_HK
dc.subjectCrystal Growthen_HK
dc.subjectFlow Directionen_HK
dc.subjectGrain Scale Flow Velocityen_HK
dc.subjectHydrothermal Activityen_HK
dc.subjectMetasomatismen_HK
dc.subjectTourmalineen_HK
dc.titleEstimating the local paleo-fluid flow velocity: New textural method and application to metasomatismen_HK
dc.typeArticleen_HK
dc.identifier.emailChen, Y:ychenc@hkucc.hku.hken_HK
dc.identifier.authorityChen, Y=rp1318en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.epsl.2009.01.013en_HK
dc.identifier.scopuseid_2-s2.0-62749153737en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-62749153737&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume280en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage71en_HK
dc.identifier.epage82en_HK
dc.identifier.isiWOS:000265594800005-

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