Analysis on metallogenic geological conditions and mineralization of Qianjiadian sandstone type in southwest Songliao Basin
The Qianjiadian deposit is located in the Qianjiadian sag in the southwest of Songliao Basin.It is the first super large sandstone type deposit found in the eastern part of our country.However,the metallogenic geological conditions and metallogenic mode of Qianjiadian deposit have been controversial.Therefore,clarifying the controlling factors of mineralization and clarifying the metallogenic mode will effectively guide the exploration of similar sandstone deposits,which is conducive to better study of sandstone deposits in the southwest of Songliao Basin.In this paper,the structure,paleoclimatological environment,sedimentary facies and sand body of the Qianjiadian deposit are studied to explore its relationship with the Qianjiadian sandstone type mineralization,clarify its influence on mineralization,and clarify the metallogenic geological conditions and mineralization of the Qianjiadian deposit.Accordingly,the four-stage ore-forming model of"sedimentary and diagenetic preenrichment-interlayer oxidation infiltration mineralization-oil-gas modification enrichment-oil-gas reduction protection"was established.
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