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Kinematics of Crystal Growth in Single‐Seal Syntaxial Veins in Limestone ‐ A Phase‐Field Study

Späth, Michael ORCID iD icon 1; Spruženiece, Liene; Urai, Janos L.; Selzer, Michael 1; Arndt, Max; Nestler, Britta 1
1 Institut für Angewandte Materialien – Computational Materials Science (IAM-CMS), Karlsruher Institut für Technologie (KIT)


Building on recent developments in phase-field modeling of structural diagenesis, we present an analysis of single-seal syntaxial calcite vein microstructure in a variety of limestones. We focus on the effects of fracture aperture, intergranular versus transgranular fracturing, crystal habit and the presence of second phases in the host rock, to systematically investigate a simplified set of models covering the main classes of limestone in 2D. We incorporate the kinematic process of growth competition between differently oriented crystals, growth rate anisotropy between rough and faceted crystal surfaces and different growth rates on intergranular to transgranular fractures. Results show that within the considered parameter space we can reproduce a wide range of vein microstructures in limestone known in nature, such as stretched crystals, wide-blocky veins, and elongated crystals. We identify five archetypes of vein microstructures in limestones, which are diagnostic for different kinematics and evolution of transport processes and illustrate the effect of key parameters in microstructure maps. We show how syntaxial veins with median line form after intergranular fracturing, while stretched crystals indicate transgranular fracturing. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000138847
Veröffentlicht am 12.10.2021
DOI: 10.1029/2021JB022106
Zitationen: 8
Web of Science
Zitationen: 8
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Computational Materials Science (IAM-CMS)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2021
Sprache Englisch
Identifikator ISSN: 2169-9313, 2169-9356
KITopen-ID: 1000138847
HGF-Programm 38.04.04 (POF IV, LK 01) Geoenergy
Erschienen in Journal of geophysical research / Solid earth
Verlag John Wiley and Sons
Band 126
Heft 10
Seiten e2021JB022106
Vorab online veröffentlicht am 04.09.2021
Nachgewiesen in Scopus
Web of Science
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