space technologies in forecasting large fields (by the example of Kazakhstan)
- Paper number
IAC-08.B1.I.7
- Author
Mr. Murat Abdrakhmanov, Space Systems Research Institute - Branch of Khrunichev Space Center, Russia
- Coauthor
Prof. Valery Menshikov, Space Systems Research Institute - Branch of Khrunichev Space Center, Russia
- Year
2008
- Abstract
Space technologies are in a high demand in searching new fields of minerals. It can be solved by detecting space indicating parameters of large fields, which can be identified using up-to-date geological petrologic geodynamical models of large-scale mineralization. The models are based on a fundamental theoretical generalization of conditions under which industrial and genetic types of ore are formed. According to a new model of their formation, giant skarn and lodestone fields amounting to 1.5?3.0 bln tons of ore are centered in oval structures with a cross section equal to 250-300* 35-50 km2 on the surface, which reflect hypogene cup-shaped depressions at the crust-mantle border. There was a concentration of ore-enriched fluid solutions in the core of these depressions, which were moved up and caused skarn and lodestone mineralization at the abutment joint of carbonate-dolomite mass and andesite-basalt one. There are giant fields Kacharskoe, Sarbaiskoe, Sokolovskoe identified in the axial region and middle-scale and small-scale objects known in the middle and peripheral areas. It is made possible to detect such oval structures along the Torgaiskiy iron-ore belt extending for thousands of kilometers and their ore-confining centers using geometrical sounding. Using a geological tectonic geodynamical analysis one similar structure is forecasted on the Russian territory at the abutment joint of the Vostochno-Uralskaya oceanic zone and the West-Siberian plate, another in Priaralye (Western Kazakhstan), and another in the Western Uzbekistan. Copper giants with rhenium, osmium, silver, lead, zinc of a zheskazganskiy type are identified to belong to an upper part of sedimentary terrigenous section of intercontinental back basins, which are synchronous to an orogenic volcanic cycle in the area of oceanic encrustation. Within stand-by tanks complex copper ore is concentrated in the form of tabular deposits in those areas, where longitudinal concertals with an orientation of orogenic and volcanic areas of transverse deep faults join. Ore-confining main areas of conjugation are often connected with arched-and-ring and radial fault systems. To forecast copper ore of zhezkazganskiy type it is necessary to use geometrical sounding to detect stand-by tanks of orogenic age, then longitudinal and transverse deep faults, and then their joints belonging to an upper part of sedimentary and terrigene section and a boundary area of a stand-by tank and its fundament. These five parameters allow us to delineate specific space for a geologic prospect evaluation survey. Large ore-prospective structures for copper fields of a zhezkazganskiy type should also include Preduralskiy side-platform linear trough of an orogenic type, which is synchronous to Verchnepolozoiskiy continental magmatism of the Uralomugodzharskiy paleocean. Indicating parameters of large chromite fields of kempirsaiskiy type “Sakmarskiy area, Mugodzhary, Western Kazakhstan” are boundary superdeep fault areas over thousands of kilometers long at the abutment joint of “continent” platform-ocean; high-raised blocks of Pre-Cambrian fundament; joints of fault areas with different orientation; allochthonous Pre-Cambrian lumps in a recent oceanic crust; ore-bearing mass broken into dunite, harburgite and gabbronorite amphibolite systems; mineralization in an upper part of a dunite level in synclinal depressed regions. Investigating the parameters of chromite fields identified using geometrical sounding at the global, continental, regional and local levels allow us to create a space picture of large chromite fields, which will be useful in geologic exploration. Indicating parameters of global, regional and local nature are characteristic for giant gold fields of Karamun (Uzbekistan), Kumtor (Kyrgyzstan), Sukhoy Log (Russia) type of several thousands of tons. Pronounced parameters are rather specific for gold objects situated in intercontinental late-oceanic cavities, in the periphery of side-continental volcano-plutonic belts, in internal middle parts of orogenic volcanic structures, interoceanic basite and ultrabasite belts. These features of large-scale gold mineralization have not been explored by space methods. The above examples confirm the expediency of exploring large and giant fields using space technologies based on the set indicating parameters and identifying their space content. The brand new stage in space geology and space metalogy should use up-to-date geologic genetic and petrologic geodynamical models of large-scale ore formation for its development.
- Abstract document
- Manuscript document
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