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UDC 553.495.078+553.2(574.2) GEOMETRICAL DESCRIPTION OF URANIUM DEPOSITS POSITION IN KAZAKHSTAN (SCALE INVARIANCE OF URANIUM ORE TAXA)
Geometrical description of uranium deposits position showed the existence of stable regularities in their distribution. The position of 5 deposits in the north-eastern Kazhakhstan is described by a circumference with the radius of 36 km. In the east of the region the position of other 14 deposits tends to 2 circumferences of the same radius. The position of 24 deposits from 27 ones is circumscribed by circles with shallow coastal carboniferous sediments inside, infilling asymmetric depressions. The age of main ore formation stage of deposits is 350–360 Ma. Centers of circumferences are located in zones of deep faults and can be generalized with a circumference which radius is 205 km. The position of uranium ores fields and deposits in the south of the region is described by 2 circumferences with the radius of 205 km. The circle with the radius of 590 km passes through centers of these and the northern circumferences. Thus, geometrical systems, describing the position of deposits form three levels. Main features of geological space circumscribed by circles are largely repeated at each level. They are the presence of arc faults, definite position of centers and presence of asymmetrical depressions within circumferences. Beginning of sedimentation in these depressions corresponds to the main ore formation stage. The results of analysis of special distribution of uranium deposits can be used both during the specification of traditionally allocated promising areas and distinguishing of top-priority objects from a large quantity of weakly marked ones.
Key words: Northern Kazakhstan, uranium deposits, morphology of uranium ore fields, geometrical description, spatial regularities of ore formation.
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