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利用最新取得的内蒙古北山北带小狐狸山斑岩型钼多金属矿辉钼矿Re-Os同位素测年资料以及小狐狸山岩体锆石206Pb/238U表面年龄资料,结合前人研究成果,对该矿床的成岩、成矿年龄进行了分析研究。根据测试结果,认为该矿床成因类型为斑岩型,含矿岩体形成时间为(246.8±1.7)Ma,为早三叠世晚期,成矿时间为(220.0±2.2)Ma,为晚三叠世早期,两者反映了成岩→成矿活动的时间轨迹,代表了小狐狸山斑岩型钼多金属成矿系统成矿过程的时间域。
Using the latest dating data of the Re-Os isotopic dating of molybdenite from the Xiaoxueshan porphyry molybdenum polymetallic deposit and the 206Pb / 238U zircon age of the Xiaoluoshan Mountain rock mass, and combining with the previous research results, The diagenesis and mineralization age of this deposit have been analyzed. According to the test results, the genetic type of the deposit is considered to be porphyry type. The formation time of the ore-bearing rock mass is (246.8 ± 1.7) Ma, which is the late Early Triassic and the metallogenic time is (220.0 ± 2.2) Ma, In the early period of the Eocene, both of them reflected the time-course of diagenesis → metallogenic activity and represented the time domain of metallogenic process of molybdenum-polymetallic metallogenic system in Xiaoluoshan Mountain porphyry.