The Deposit Characteristics And Ore Genesis Of Jining Iron Mine

Jining iron mine is one of the biggest iron mines which is also one of the deepest iron mines in Shandong. It was necessary to study the deposit characteristics and ore genesis of Jining iron mine for serving the exploration of deep ore body. This paper started from regional geology and characteristics of Jining rock group, and explained the deposit characteristics by analyzing deposit' morphology, sedimentary facies and metamorphic facies. And it recounted the ore genesis by studying ore-forming material source, Migration and Enrichment of iron, metallogenic physical chemical condition and effects of metamorphism.Through the above study, It could be obtained that the orebody lays in Jining rock group by stratified or stratiform-like, and cut by two faults, the main components of iron ore are magnetite and quartz, magnetite polymerization into dark bands and the bands'width are unequal, bands-dense infection structure which made from magnetite dark bands and quartz, sericite, chlorite light color bands can be seen. magnetite-quartzite is the most t important cause to cause the gravity and magnetic anomaly of Jining area, the characteristics of gravity and magnetic anomaly reflects the form and position of the orebody. The ore genesis were studied by comparison of Jining iro mine and the other BIF, and analysised the geological characteristics of deposit and geochemical characteristics. Finally obtained that Jining iro mine is a new type iro mine which is different from the othe BIF which discoved early. Its ore-forming material source is corroded archean craton greenstone belt, the migration form of ferrum is colloid and true solution. It is considered that the genetic type of deposit is metamorphic sedimentary iron deposit, Its metamorphic grade lower than early precambrian magnetite-quartzite iron mine.