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《Geology of Chemical Minerals》 1993-02
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ANALYSIS OF PALEAOTECTONO-SEDIMENTARY CONDITIONS FOR SUBMARINE EXHALATION-SEDIMENTARY DEPOSITS OF PROTEROZOIC AGE IN CENTRAL NEIMENGGU

Zhao Xiao (Geological Institute for Chemical Minerals,Ministry of Chemical Industry)  
Acting as controlls on formation of exhalation-sedimentary deposits,paleaotectono-sedimentary regime has become attracting more and more attentionfrom home and foreign geologists.That is the ease of the Neimenggu polymetallic oredeposits which are associatecl intermittently with the epimetamorphic,clastic-carbonate facies of Langshan and Zhaertai groups in some special fault basins.Thesetectonic depressions,usually located along both sides of a paleaolift in a rift zone nearthe Proterozoic Neimenggu craton,are controlled by deep faults.Apart from thedepressions.rift troughs,third order fault basins,synsedimentary faults and therelative igneous activities were also analysed paleaotectono-sedimentologically so as toestablish a paleaotectonic ore-controlling model.The model demonstrates that theNeimenggu sulphur-polymetallic ore deposits of their kinds have a close linkgenetically with all these paleaostructures,rift troughs along margins of cratons,growth faults and third order fault basins.
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