HR: 0800h
AN: GP41A-0833    [Abstracts]
TI: GIS Compilation of Geophysical Data for Northeast Russia and Adjacent Areas as a Tool for Constructing Tectonic Elements
AU: * Zayonchek, A
EM: A_Zayonchek@rambler.ru
AF: Geological Institute of the Russian Academy of Science (GIN RAS), St. Petersburg Laboratory, Office 204, Moika 120, St. Petersburg, 190121 Russian Federation
AU: Aslamov, Y
AF: JSC NPP VIRG Rudgeophizika, 11, Petrovskaya kosa, St. Petersburg, 197110 Russian Federation
AU: Chernuh, A
AF: Russian Research Institute for Geology and Mineral Recourses of the World Ocean VNIIOkeangeologia, Anglisky pr. 1, St. Petersburg, 190121 Russian Federation
AU: Mishin, A
AF: JSC NPP VIRG Rudgeophizika, 11, Petrovskaya kosa, St. Petersburg, 197110 Russian Federation
AB: A large part of Northeast Russia consists of extensive offshore continental shelf. To construct a comprehensive plate tectonic model for the circum-Arctic region we need to understand the geological links between the Northeast Russia mainland, its adjacent shelf and the ridges in the Arctic Ocean , the oceanic Gakkel Ridge, the continental Lomonosov Ridge and the enigmatic Mendeleev Ridge. Geological studies on thefew islands do not provide sufficient data to fully understand the tectonic evolution of the surrounding shelf. Modern GIS compilation of available geophysical data is important and useful for constructing the main geophysical and tectonic elements of the region. Data include public domain compilations such as Magnetic Anomalies of the Arctic and North Atlantic Oceans and Adjacent Land Areas (J. Verhoef et al., 1998), International Bathymetry, International Bathymetric Chart of the Arctic Ocean (R. Macnab et al., 2000) and the Arctic Gravity Project (R. Forsberg et al., 2001). Poor geophysical coverage of the Northeast Russian shelf and adjacent deep ocean areas is additionally complicated by the diversity of technologies applied during data acquisition. For example, gravity data includes land stations, marine gravity, aerogravity, satellite altimetry and submarine measurements. As a consequence, numerous artifacts appear at the junctions of neighboring survey areas resulting from different quality and level of detail of data. To eliminate this problem, original GIS for magnetic, bathymetry, gravity and seismic datasets available in Russia was compiled and this dataset enabled better definition of the true geophysical or tectonic elements and their discrimination from technologic artifacts.
DE: 9315 Arctic region
DE: 8102 Continental contractional orogenic belts
DE: 8105 Continental margins and sedimentary basins
DE: 8110 Continental tectonics--general (0905)
DE: 3010 Gravity
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2004 AGU Fall Meeting