Abstract
Geoelectric structure of the mantle at the depth of 100—1000 km is determined through joint interpretation of magnetotelluric sounding in 115 sites in the territory of southwestern part of the East European Platform and geomagnetic induction sounding at geomagnetic observatories of Ukraine, Belarus and Poland. Data inversions are considered in terms of conductance distribution. Below the depth of 450 km a sharp increase of conductivity begins. Throughout the whole area a layer of high conductivity can be selected with thickness of about 200 km with the center at a depth of 750 km. A single conductive layer at the depth of 100—200 km, was not revealed as a result of this study. In the vicinity of the Minsk observatory local objects with increased conductivity at different depths in the crust have been marked.
Highlights
Ó÷èòûâàÿ âûøåèçëîæåííîå, äëÿ ïîñòðîåíèÿ îáîáùåííûõ êðèâûõ çîíäèðîâàíèé áûëè âçÿòû êðèâûå ìàãíèòîòåëëóðè÷åñêèõ çîíäèðîâàíèé (ÌÒÇ) (íàçûâàåìûå â äàëüíåéøåì ãëóáèííûìè ÌÒÇ ÃÌÒÇ) òîëüêî â òåõ ïóíêòàõ , ãäå äèàïàçîí äàííûõ èçìåíÿåòñÿ îò ñåêóíä äî ïåðèîäîâ, ïðåâûøàþùèõ 1 ÷
Geoelectric structure of the mantle at the depth of 1001000 km is determined through joint interpretation of magnetotelluric sounding in 115 sites in the territory of southwestern part of the East European Platform and geomagnetic induction sounding at geomagnetic observatories of Ukraine, Belarus and Poland
Summary
Ó÷èòûâàÿ âûøåèçëîæåííîå, äëÿ ïîñòðîåíèÿ îáîáùåííûõ êðèâûõ çîíäèðîâàíèé áûëè âçÿòû êðèâûå ÌÒÇ (íàçûâàåìûå â äàëüíåéøåì ãëóáèííûìè ÌÒÇ ÃÌÒÇ) òîëüêî â òåõ ïóíêòàõ , ãäå äèàïàçîí äàííûõ èçìåíÿåòñÿ îò ñåêóíä äî ïåðèîäîâ, ïðåâûøàþùèõ 1 ÷. Ýòè äàííûå áûëè èñïîëüçîâàíû äëÿ ïîñòðîåíèÿ îáîáùåííûõ êðèâûõ çîíäèðîâàíèé ïóòåì ñîâìåùåíèÿ ÃÌÒÇ â îòäåëüíûõ ïóíêòàõ ñ ðåçóëüòàòû ÌÂÇ â ãåîìàãíèòíûõ îáñåðâàòîðèÿõ KIV è BEL.  íàñòîÿùåé ñòàòüå ïîñòðîåíû îáîáùåííûå êðèâûå çîíäèðîâàíèé ïóòåì ñîâìåùåíèÿ êðèâûõ ÃÌÒÇ â äèàïàçîíå ïåðèîäîâ îò 14 äî 640010 000 ñ â îòäåëüíûõ ïóíêòàõ è ðåçóëüòàòû ÌÂÇ íà ãåîìàãíèòíîé îáñåðâàòîðèè MNK [Semenov, 1998; Semenov, Jówiak, 2005].
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