Abstract
The main aim of the study, presented in this article was to precise the deep geological structure of joint zone between the Tien-Shan orogenics and Turan platform. Within this research we have determined the petrophysical features of the pre-Mesozoic sections of this zone. These data will help us in the further prospecting works for minerals searching. The principal method of study was the seismic-density modelling data complex interpretation, bonded to the geological and subsurface information from the previous works. The modeling was provided along the lines in the South-Western Gissar region, Uzbekistan. The main features, we paid attention, were rocks density, seismic wave velocity and magnetic features. As a result, deep geological structure and petrophysical features of different pre-Mesozoic formations of the study area were obtained.
Highlights
The density modeling is one of the important methods for the deep geological structure researches
In difference from it, within the Turan plate exists only the platform mode, which characterized by generally high values of a heat flow that testifies by big power and the endogenous and tectonic potential of earth crust of this territory, which is ready to transformations [31, 33, 34]
Within the South Tien-Shan geosyncline, the Lower Paleozoic deposits are represented by rhythmically alternating shales, sandstones, siltstones with individual interbeds of gravelites and conglomerates, limestones, siliceous rocks, basic porphyries, quartz albitophyres and their tuffs are usually weakly magnetic (χ on average 0-30 х 10-6 GHS), they have a sufficiently high apparent resistance and the boundary velocity (Vg = 5300-5400 m/s), the average density
Summary
The density modeling is one of the important methods for the deep geological structure researches. The first stage of the orogeny mode in the geomorphological plan corresponds to the Nurata ridge, Northwest spurs of the Turkestan and Zeravshan ridges, the Surkhandarya and Fergana basins [7, 8, 10, 18, 25, 33, 34]. These areas are active fields of transition from a platform to orogeny modes. In difference from it, within the Turan plate exists only the platform mode, which characterized by generally high values of a heat flow that testifies by big power and the endogenous and tectonic potential of earth crust of this territory, which is ready to transformations [31, 33, 34]
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