吉林大学学报(地球科学版) ›› 2015, Vol. 45 ›› Issue (4): 1098-1111.doi: 10.13278/j.cnki.jjuese.201504113
俞礽安1,2, 唐永香3, 张峰2, 谢瑜2, 张超2, 郭虎2
Yu Reng'an1,2, Tang Yongxiang3, Zhang Feng2, Xie Yu2, Zhang Chao2, Guo Hu2
摘要:
乌和尔楚鲁图钼矿床位于国内重要的二连东乌旗钼矿成矿带中,为近几年新发现的斑岩型钼矿床.本次就该矿床成矿岩体的地球化学及其U-Pb年代学开展相关研究.结果表明: 矿区中的成矿岩体属过铝质、高钾钙碱性系列;富集大离子亲石元素(LILE)、亏损高场强元素(HFSE),具有与南岭型花岗岩相似的地球化学特征.锆石LA-ICP-MS U-Pb定年显示,与乌和尔楚鲁图钼矿床成矿有关的花岗斑岩形成于中侏罗世((160 ± 1)Ma).因此,可推测乌和尔楚鲁图钼矿床斑岩型钼矿的成矿时代为燕山早期.综合研究认为乌和尔楚鲁图斑岩型钼矿床形成于后碰撞的构造环境.
中图分类号:
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