1成矿地质背景研究区大地构造位置位于扬子板块早古生代被动大陆北缘,向南靠近区域东西向山阳—牛耳川大断裂,大断裂以南为南秦岭印支褶皱带;北侧以商丹大断裂与北秦岭加里东褶皱带相隔。2矿床稀土元素稀土元素是很好的物源示踪剂,是了解岩浆作用机理的有效途径,可为找矿提供重 1 Geological setting of the study area The tectonic location of the study area is located in the Early Paleozoic Passive Continental Margin of the Yangtze Plate, southward to the east-west Sanyang-Niu Er Chuan Large Fault, south of the Great Fault to the South Qinling Indosinian fold belt, and north to Shangdan Large faults are separated from the Caledonian fold belt in the North Qinling. 2 REE REE REE is a good source tracer, which is an effective way to understand the mechanism of magmatism and provide heavy ore for prospecting