Viscous mantle tangential stresses in a numerical model of a supercontinental cycle

Morphotectonic and petrological characteristics of Permo-Triassic traps of Siberia

“…Tomographic maps of transverse waves with vertical polarization were compiled in a depth interval of 50-700 km with an interval of 25 km in depth (Figure 11) using the GIS-ENDDB software [43][44] based on the method [45]. These data update the conclusions that there are no signs of the Khatanga-Ob threefold rift juncture between the slab lithospheric blocks of the WSP, SC and Kara sedimentary basin (Figure 11a); the existence of a single mantle field of PTTS volcano-plutonic magmatism (Figure 11b-d 8) Lama lake -authors' data for the volcanic section of its south margin; (9) Dyupkun lake -data for volcanic section of its margins [29]; (10) West SibLIP [92][93]; (11) South SibLIP data by S.D. Kurtseraite, (12) Kamensky Dyke belt (North) -data by [29].…”

“…Models of the PTTS formation are discussed based on the generation pattern of mafic melts and deformation of the earth's crust by upper mantle plumes. For intraplate geodynamic processes with the formation of faults in lithospheric rocks, the sources of such deformations can be global and local stretching of the lithosphere affected by convective flows in the upper mantle, both with and without the formation of decompression melting regions [10][11]. By numerical modelling of the rift formation above asthenosphere zones for areas of slow-spreading ridges [12] and the evolution of upper mantle plumes under the WSP and SC lithosphere [13][14][15], we calculated lateral dimensions of rift valleys over ascending convective flows above hot spots as the first tens of kilometres by model [5].…”

“…Figure 10. Data of petrochemical compositions in traps from different parts of the West Siberian Plate and the Siberian Craton: (1) SG-6, (2) NKC-1, (3) VK-42.43 -numbers of reference sections in the deep and super-deep wells of the same name [32-33]; (4) Kuzbass [90-91]; (5) Taimyr [92-93]; (6) Mid-North SibLIP -data of Almukhamedov and Medvedev, estimates of Tb/Yb in works [94-95]; (7) Meymecha-Kotui -[96] (for the Onkuchanskaya suite of the Maymecha-Kotui province); (8) Lama lake -authors' data for the volcanic section of its south margin; (9) Dyupkun lake -data for volcanic section of its margins[29];(10) West SibLIP[92][93];(11) South SibLIP data by S.D. Kurtseraite,(12) Kamensky Dyke belt (North) -data by[29].…”

Achievements of tectonophysics research in Russia: Present status and perspective

“…We are talking about a new stage in generation mechanism of stresses in the Earth's crust and the continental lithosphere. It is crucial to understand the relative impacts of deviatoric component of gravitation stress tensor, of the planetary stresses related to the Earth's rotation (Leibenzon, 1955;Stovas, 1975), and of the stresses due to plate tectonics (Bobrov and Trubitsyn, 2006;Trubitsyn, 2000;Trubitsyn and Rykov, 2000) on the overall stress state. Our studies demonstrate that the role of residual stresses generated by gravitational compaction was not correctly evaluated, and must be re-evaluated (Rebetskii, 2008;.…”