Research On The Geochemistry?ore Controlling Structure And Metallogenic Model Of Futuyu Delafossite

Futuyu deposit is one of hydrothermal metasomatic skam deposits,Formed in the Mesozoic diorite porphyrite Contact metasomatic Ordovician limestone and dolomite of Gaoyuzhuang Formation.The main Minerals of Futuyu deposit are copper and iron ore.The iron formed in the stage of skam.The copper mine Formed in hydrothermal metasomatic period.lt Divided into Futuyu,Geziling,xiaoligou three ore segment from the south to the north.Three ore segment have similar origin.It is a deposit that been cutted into three sections by the NE trending faults.We summarize the metallogenic model In this paper through the study of the controlling structure of ore deposit,the eochemistry of typical profile,ore-forming fluid and the material sources.1.Through the study of skam typical profiles,the migration of substances in the skam forming are summarized.In the process of the formation of skam,Ca,Mg,Mn and other elements in limestone have activation and migration.Diorite porphyrite provides Si,Al,K,Na and other elements,It generates a large amount of silicate minerals in the process of the contact metasomatic.The data of REE also show that the skam was transformd obviously by the hydrothermal.2.Through the study of ore-controlling structure,iron ore is mainly affected by the contact structure and strata.Copper mineralization is mainly affected by the faults.The NNE trending faults are the main ore-depositing structure and ore-conducting structure.The NE faults destroyed the ore.3.The fluid inclusions shows that there ware two kinds of fluid in the Deposit.The high salinity,high density immiscible fluid caused the iron precipitation with the contact metasomatism and precipitation.The Advanced fluid is one hydrothermal that medium temperature and moderate salinity.It is boiling because of the change of physicochemical conditions influenced by precipitation and contact.resulting in the precipitation of copper.4.The Hydrogen and oxygen isotopes study shows that the flowing water in min-ing area is mainly magmatic water,but a large number of Atmospheric precipitation joined in the later.Sulfur isotope show that the mineral is mainly derived from the mantle;lead isotope study show that the ore-forming material subjected to contami-nation of mantle and crust,a large part of them come from the crust.