The methodology and results of the seismic processing of MCWE data in the Onega ore district (Baltic Shield)

: pp. 367 - 369
Received: July 22, 2013
Institute of Geology of the Karelian Research Center of the Russian Academy of Sciences
Russian Geoecological Center Branch of the Federal State Unitary Geological Enterprise "Urangeo"
Subbotin Institute of geophysics of National Academy of Sciences of Ukraine

Purpose. The aim of the study is to find the communication features of the deep structure in particular srednemashtabnyh heterogeneities of the crust and the transition zone crust-mantle localization fields and rudoproyaleny surface to build geodynamic model Onega ore area. Methodology. An original method of statistical data processing converted waves of earthquakes using not only the kinematics but also dynamic parameters. Results. In this paper we set out the methodology and the results of statistical data processing converted waves of earthquakes in the Onega ore area. The connection with the peculiarities of the seismic parameters of the geological structure of the individual crustal blocks. It was found that the deposits are spatially associated with the presence of high power anderpleytingovogo layer which probably took place in the Paleoproterozoic from 2.45 to 1.7 Ga main differentiation of mantle magmatic melts large igneous provinces with the separation of fluid and ore phases. It created favorable conditions for the subsequent implementation of metal-rich magmatic melts in the upper layers of the cortex and the formation of deposits of chromite and titanomagnetite with the accompanying elements. Metasomatic complex uranium-vanadium ore were formed in tectonic Svecofennian (1.8-1.7 Ga) stage, which led to a significant transformation of the crust and accompanied vepsiyskim basic magmatism and related intense flyuidoobrazovaniem under the influence of mantle diapir. Originality. For the first time MСWE seismic data processed using statistical analysis and compared with data from the DSS in the area of the Onega ore area, where there was a deep drilled appraisal wells. The practical significance. Offered in the geodynamic model of the Onega structure allows you to develop specific criteria for prospecting and exploration of deposits of uranium-vanadium ores

  1. Drogitskaya G.M. Osobennosti glubinnogo stroenija zemnoj kory Korsun'-Novomirgorodskogo i Novoukrainskogo massivov (Ukrainskij shhit) po sejsmicheskim dannymх [Features of deep crustal structure and Korsun-Novomirgorod Novoukrainsky arrays (Ukrainian shield) seismic data]. Geodinamika [Geodynamics] no. 1(8), 2009, pp. 76-83.
  2. Nikitin A.A., Petrov A.V., Aleksashin A.S. Kompleks spektral'no korreljacionnogo analiza dannyh „KOSKAD 3D” [Kompleks spectral correlation analysis of data "KOSKAD 3D] Moskva, Moskovskij Gosudarstvennyj geologo-razvedochnyj universitet.  2004, 158 p.
  3. Onezhskaja paleoproterozojskaja struktura (geologija, tektonika, glubinnoe stroenie i mineragenija) [Onega Paleoproterozoic structure (geology, tectonics, deep structure and Minerageny)]/ Otv. red. L.V. Glushanin, N.V. Sharov, V.V. Shhipcov. – Petrozavodsk: KarNC RAN, 2011, 431ps.
  4. Starostenko V.I., Kazanskij V.I., Popov N.I., Drogickaja G.M., Zajac V.B., Makivchuk O.F., Tripol'skij A.A., Chicherov M.V. Ot poverhnostnyh struktur k integral'noj glubinnoj modeli Kirovogradskogo rudnogo rajona (Ukrainskij shhit) I[From surface structures to the integrated depth model of the Kirovograd ore district (Ukrainian Shield) I]. Geofiz. zhurn. − [Geoph. journal] 2010. 32, no. 1, pp. 3-33.
  5. Sharov N.V., Isanina Je.V., Zamozhnjaja N.G., Krupnova N.A., Sulejmanov A.K. Rezul'taty glubinnyh sejsmicheskih issledovanij metodami OGT, GSZ i MOVZ Onezhsko-Ladozhskoj ploshhadi (Respublika Karelija, Rossija). [The results of deep seismic survey DSP, DSS and MСWE Onega-Ladoga area (Karelia, Russia)]Geofiz. Zhurn[Geoph. journal].   2011, 33, no. 3, pp. 23-39.
  6. Janovskaja T.B., Dmitrieva L.A. Vlijanie nezhestkosti kontakta uprugih sred na kojefficient otrazhenija, prelomlenija i obmena[Influence of slackness contact elastic media by a factor of reflection, refraction and exchange]. Izv. AN SSSR, Fizika zemli[Proceedings of the Academy of Sciences of Physics of the Earth]. 1991.  No. 5, pp. 17-22