Structure of the Earth’s Crust According to the Gravity Data of the GOCE Satellite Mission and Spatial Position of Polymetallic Deposits in the Frame of the Siberian and Eastern European Platforms

Abstract

The results of recent study of the Earth’s crust based on the gravity data of the GOCE satellite were used for a comparative metallogenic analysis of the geodynamic settings of polymetallic deposits in the folded frame of Siberian and East European platforms. It is shown that deposits of the SEDEX type are more often located in the earth’s crust with the predominant development of the lower “basalt” layer. Pyrite copper and lead-zinc deposits (VMS), as well as some occurrences of the SEDEX type, are known in subduction island-arc and accretionary settings on the crust with the predominant development of the middle “granite” layer. Pb–Zn ores of the MVT-type are localized in deep pericratonic sedimentary oilgas basins on the shelf and continental slope, with no spatial relationship with the stratification of the earth’s crust. The Ag-polymetallic mineralization of Taimyr and Western Verkhoyansk are confined to deep pericratonic rift troughs on the passive continental margin, have a similar ore-bearing environment and may be considered as a single silver-polymetallic Taimyr-West Verkhoyansk belt. The obtained results to confirm the prospects of Pb–Zn deposits in Central and Eastern Taimyr, as well as the Saurey ore region (Polar Urals) and the need for their further research.

The Polymetallic Deposits of the Western European Plate and Structure of the Earth's Crust According to GOCE Gravity Data

“…The concentration of pyrite volcanogenic deposits in Sweden and Finland occurs in areas of the thickened upper "metamorphic" layer of the consolidated crust, as well as in areas of increased thickness of the middle layer and decreased thickness of the lower layer. Similar patterns of crustal structure and placement of VMS ores are also noted in the frame of the East European and Siberian platforms [Galyamov et al, 2023]. This feature of the deep structure of the earth's crust is also observed in the Norwegian Caledonides zone in the north of the Scandinavian Peninsula.…”

“…The crust of Western Europe differs from the crust of the East European Platform [Belousov and Pavlenkova, 1989;Galyamov et al, 2023]. Its greatest thickness (average 30 km) does not exceed 48 km compared to 57 km (average 39 km) in the east of the European continent.…”

“…This article continues the study of global and regional trends of location of lead-zinc deposits [Galyamov et al, 2021[Galyamov et al, , 2022[Galyamov et al, , 2023 and focuses on the spatial relationships of polymetallic ores and features of the deep structure of the earth's crust within Western Europe and the Mediterranean segment of the Tethys belt.…”