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  • 1
    Keywords: lithosphere ; seismic anisotropy
    Description / Table of Contents: Plate tectonics has significantly broadened our view of the dynamics of continental evolution, involving both the processes currently active at the surface and those extending deep into the interior of the Earth. Seismic anisotropy provides some of the most diagnostic evidence for mapping past and present deformation of the entire crustmantle system. This volume contains papers presented originally at an international workshop at the Chateau of Trest in the Czech Republic in 1996. This workshop brought together geophysicists and geologists who work in the field of observational and theoretical seismology, mineral and rock physics, gravity studies and geodynamic modelling. Topics include large-scale anisotropy of the Earth's mantle, mantle heterogeneity vs. anisotropy 3-D velocity and density structures and inferences on mantle dynamics, mineral and rock physics studies, and mathematical aspects of complex wave propagation.
    Pages: Online-Ressource (506 Seiten)
    ISBN: 9783764359072
    Language: English
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  • 2
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Joint analysis of shear-wave splitting parameters and directional dependence of teleseismic P residuals based on data from the seismic experiment TOR across the Trans-European Suture Zone suggest that the Sorgenfrei–Tornquist Zone (STZ) in northern Denmark forms the south-western margin of Baltica in the upper mantle. Different lithosphere thickness and different orientation of seismic anisotropy in the mantle lithosphere identify three domains separated by the STZ between Denmark and southern Sweden and the Thor Suture between northern Germany and Denmark. We suggest that the anisotropy reflects frozen-in olivine fabrics, most probably created during early stages of the evolution of the European continent. The middle Danish block might represent a microplate caught in between Avalonia and Baltica before the Caledonian orogeny.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 23 (1979), S. 288-295 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Резюме 17 зеmлеmрясенuŭ uз североumaлъянскоŭ серuu 1976 . зanuсaнных 5 сре¶rt;неевроnеŭскumu сmaнuuяmu uссле¶rt;овaно с mочкu зренuя вреmен nробе a волн Pn, Pg, Sn u Sg. Имея в вu¶rt;у nреumущесmвенно оmрuщamелъые невязкu оmносumелъно сmaн¶rt;aрmных о¶rt;о рaфов ¶rt;ля блuзкuх зеmлеmрлсенuŭ nре¶rt;nолa aеmся nовыщенuе скоросmеŭ обьеmных волн в uзучaеmоm aзumуmе. Обсуж¶rt;aеmся связъ nовыщенuя скоросmеŭ с mекmонuкоŭ Чещско о maссuвa.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 16 (1972), S. 383-392 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The coefficient of the gamma-ray absorption μ Cs 137 investigated in eclogites of the Bohemian Massif varies with fresh samples from0.2477 cm −1 to 0.2804 cm −1 . Symplectite is the main factor decreasing the value of μ down to0.242 cm −1 . On the contrary, the coefficient μ increases with the increasing content of clinopyroxene and especially of garnet. The linear dependence of the coefficient μ on the density ϕ may be expressed by the equation μ=0.0682ϕ+0.028.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 17 (1973), S. 67-67 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 18 (1974), S. 126-133 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The mean compressional wave velocities in unsaturated and water saturated granodiorite specimens are higher by 18 and 33 per cent, respectively, than the mean velocity determined by piezo-electric field measurements in the uppermost zone of a granodiorite massif. After the saturation the velocity of the ultrasonic waves in the granodiorite specimens increased by 12 per cent and the velocity anisotropy decreased from 8 to 5 per cent on the average.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Резюме В сmamье сmрояmся регuонaльные временa nробегa волн Pn, Pg, Sn u Sg nрuхо¶rt;ящuх в Чешскuŭ мaссuв с северо-восmокa. Покaзaно, чmо ¶rt;о рaссmоянuя в 5° оm эnuценmрa регuонaльныего¶rt;огрaфы ¶rt;aюm более короmкuе временa nробегa nо срaвненuю со сmaн¶rt;aрmнымu u скоросmu рaсnросmрaненuя волн, блuзкuе к скоросmям nолученным uз сmaн¶rt;aрmныхго¶rt;огрaфов. Дaеmся соnосmaвленuе локaльных uзмененuŭ скоросmеŭ рaсnросmрaненuя волн с mекmонuкоŭ Чешского мaссuвa.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 31 (1987), S. 266-283 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Description / Table of Contents: Summary Teleseismic P residuals calculated for waves arriving from various azimuths and angles of incidence, and a 3-D inversion of the residuals provided the basis for characterizing the uppermost mantle structure beneath Bulgaria. The Moesian Platform and the Rhodopean Massif are two different blocks characterized by a lithosphere thickness of about 130–140 km with a zone of lithosphere thinning along their contact. Both units have opposite patterns of the directional dependence of relatively high and low P velocities. This directional dependence is interpreted by dipping anisotropic structures in the subcrustal lithosphere, which probably represent remnants of paleosubductions of an old oceanic lithosphere.
    Notes: Резюме Рaсчumaны временные невязкu Р волн nрuхо¶rt;ящuх nо¶rt; рaзнымu aзuмуmaмu u у лaмu. Трехмернaя uнверсuя эmuх невязок ¶rt;aеm основу ¶rt;ля хaрaкmерuзaцuu сmрукmуры верхнеŭ мaнmuu nо¶rt; Бол aрuеŭ. Мuзuŭскaя nлamформa u Ро¶rt;оnскuŭ мaссuв, ¶rt;вa рaзлuчных блокa mолщuхоŭ лumосферы nрuблuзumельно 130–140 км с зоноŭ ¶rt;е лumосферa mоньше в¶rt;оль uх конmaкma. Обa блокa хaрaкmерuзовaны nроmuвоnоложно нanрaвленноŭ зaвuсuмосmыо оmносumельно высокоŭ u нuзкоŭ скоросmu Р волн. Эma нanрaвленнaя зaвuсuмосmь uнmерnреmuровaнa кaк nо руженuе aнuзоmроnных сmрукmур в верхнюю мaнmuю. Эmu сmрукmуры можно nре¶rt;сmaвumь кaк осmamкu naлеосуб¶rt;укцuŭ сmaроŭ океaнuческоŭ лumосферы.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Studia geophysica et geodaetica 21 (1977), S. 295-306 
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary Amplitudes and periods of seismic waves recorded both in the short-period and in the intermediate-period ranges at the seismic stations Průhonice, Praha and Kašperské Hory are influenced by the tectonic situation in the focal regions rather than by the anisotropic structures of the geologic formations underlying the stations. Large amplitude variations and differences in periods due to instrumental effects were also found.
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