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Bulk rock elastic moduli at high pressures, derived from the mineral textures and from extrapolated laboratory data
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SYSNO ASEP 0440054 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Bulk rock elastic moduli at high pressures, derived from the mineral textures and from extrapolated laboratory data Author(s) Ullemeyer, K. (DE)
Lokajíček, Tomáš (GLU-S) RID, SAI, ORCID
Keppler, R. (DE)
Vasin, R.N. (RU)
Behrmann, J. H. (DE)Article number 012093 Source Title 17th International Conference on Textures of Materials (ICOTOM 17), IOP Conference Series-Materials. - Dresden : Technische Universität Dresden, 2015 - ISSN 1757-8981 Number of pages 5 s. Publication form Online - E Action International Conference on Textures of Materials (ICOTOM) /17./ Event date 24.08.2014-29.08.2014 VEvent location Dresden Country DE - Germany Event type WRD Language eng - English Country DE - Germany Keywords mineral textures ; bulk rocks ; laboratory data Subject RIV DC - Siesmology, Volcanology, Earth Structure Institutional support GLU-S - RVO:67985831 UT WOS 000354878500094 EID SCOPUS 84928793273 DOI https://doi.org/10.1088/1757-899X/82/1/012093 Annotation The elastic anisotropy of bulk rock depends on the mineral textures, the crack fabric and external parameters like, e.g., confining pressure. The texture-related contribution to elastic anisotropy can be predicted from the mineral textures, the largely sample-dependent contribution of the other parameters must be determined experimentally. Laboratory measurements of the elastic wave velocities are mostly limited to pressures of the intermediate crust. We describe a method, how the elastic wave velocity trends and, by this means, the elastic constants can be extrapolated to the pressure conditions of the lower crust. The extrapolated elastic constants are compared to the texture-derived ones. Pronounced elastic anisotropy is evident for phyllosilicate minerals, hence, the approach is demonstrated for two phyllosilicate-rich gneisses with approximately identical volume fractions of the phyllosilicates but different texture types.
Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Tel.: 226 800 273 Year of Publishing 2015
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