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.
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.
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Babuška, V., Plomerová, J. & Spasov, E. Deep structure of the lithosphere beneath the territory of Bulgaria. Stud Geophys Geod 31, 266–283 (1987). https://doi.org/10.1007/BF01624758
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DOI: https://doi.org/10.1007/BF01624758