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小孤山地区的成矿区划位于野马泉-开木棋河华力西期铁、铅、锌、钴、金、锡成矿亚带。华力西期石英闪长岩体(δOa4)与金水口岩群发生接触变质,蚀变有矽卡岩化、角岩化、蛇纹石化、绿帘石化和绿泥石化等,对于形成矽卡岩型铁多金属矿床十分有利。M7磁异常才是小孤山的异常主体,结合地质背景,推断该异常是由磁铁矿引起。
The ore-forming regionalization of the Xiaogushan area is located in the iron ore, lead, zinc, cobalt, gold and tin mineralization subbands of the Yemaquan-Kaiwuqihe Warisian period. Variscan quartz diorite body (δOa4) and Jinshuikou group metamorphic metamorphism, alteration of skarn, horn rock, serpentinization, epidote, chlorite and so on, for the formation of skull Rock type iron polymetallic deposits are very favorable. M7 magnetic anomaly is the main body anomaly in Xiaogushan, combined with the geological background, infer that the anomaly is caused by magnetite.