The dynamical interactive model of development of the Central Kyzylkum Ore-Magmatic Concentre (CKOMC) using GIS & RS, Western Uzbekistan
|Location||International Geological Congress,oslo 2008|
|Holding Date||17 September 2008|
This paper deals with the application of complex study of Remote Sensing and GIS with geophysical and geological observations in creation the 3-D Dynamical interactive model of Central-Kyzylkum Ore-Magmatic Concentre (CKOMC). Recent advances in geology and sciences dealing with planets resulted in ever-growing information on the internal structure and composition of upper and lower mantle and its role in the development of mineral deposits. Thus, the analysis of geologic-geophysical velocity sections on DSS-MOVZ profiles, that cross Central Kyzylkum, has revealed a number of features, which are characteristic of the upper mantle rocks, related to morphology of bodies, their physical properties, consisting mainly in their contrasting values for contiguous blocks, and general increased velocity and density of the rocks they contain. Analysis of the same profiles proved the previous conclusions, and besides it allowed us to create the geodynamical model of development of a complicated continental Lithosphere within CKOMC as a part of Western Uzbekistan’s territory, that has maximum concentration of gold ore deposits of different scale, including the gigantic one- Muruntau. As a result of obduction of doubled, and sometimes even trebled crust of the ocean to continental, the front of rock granitization shifted to the sphere of ocean sediments development, and granite-gneiss layer of the continental crust went down to granulite zone. The latter factor provoked mass penetration of fluids from the former granite-gneiss and sedimentary-metamorphic layers, which due to their up rush to the surface, formed fluid-hydrothermal system, enriched with gold, in the new upper crust. This, in its turn, conditioned the formation of numerous gold ore deposits of different facies and formations observed in Central Kyzylkums. Such a mechanism of the continental lithosphere formation explains the formation of blocks of crust, conditioned by the abrupt change of rocks having different density, and the presence single parts waveguides in lower parts of the upper crust, which are considered to be relics of the primary granite-gneiss layer enriched with fluids. The main objective is to associate the surface indicators as geological, geophysical and tectonic base of data using GIS&RS with the purpose to identify the occurrence special geoobjects of economic interest. RS&GIS methods were used to determine the interrelations of the volcanic and granitic rocks distribution-mineralization-alteration with the faults-lineaments, circular structures. The alteration zones, the tectonic lines and the circular structures related to the cones and calderas determined these methods and checked by group truth studies may be target areas to explore for some new ore deposits. As a result, our investigations envelops more then 10 mineral deposits of such kind bearing Au, Ag, Pt, U, Zn, Cu, Ni, rare earth elements and diamonds.