论双井子铁矿的成因

本文通过对甘肃双井子铁矿的地层、岩石、地球化学特征、构造等因素的研究,认为双井子铁矿的或因应属"基性火山岩、花岗岩化热液矽卡岩型铁矿".

ORIGIN OF SHUANGJINZI IRON ORE DEPOSIT, GANGSU

Shuangjinzi iron ore deposit is believed to be reformation-type granite hydrothermal skarn iron ore deposit. There are five ore-controlling factors: favorable source rocks; transection of many groups fractures; granitization; favorable wall rocks; skarnization.REE partition pattern is generally similar to the wall rocks, which indicares that REE are mainly derived from wall rocks. The separation of REE is due to the granitization metasomatism, resulted in the deficit of Eu in granite and the enrichment of Eu in skam and iron ores. The REE partition in granite and oxygen isotope indicate that this iron deposit is formed from hydrothermal granitization.