淮南煤田潘三井田西部岩浆岩侵入年代确定与意义Magmatic Intrusive Age Determination and Its Significance in Western Panji No.3 Minefield,Huainan Coalfield
苗林,刘桂建,吴盾,吴斌,陈健
摘要(Abstract)：
岩浆岩在淮南煤田潘谢矿区广泛发育,以潘三井田西翼岩浆岩为研究对象,对采集的岩浆岩样品经破碎、人工分选出锆石,采用激光剥蚀电感偶合等离子体质谱(LA-ICP-MS)对锆石进行元素和同位素测试,将测试结果用isoplot软件包投影到207Pb/235U-206Pb/238U图解上,并与标准锆石91500分析点所获得的同位素比值经线性拟合。结果表明,研究区内岩浆岩发生侵位的时期为距今大约118Ma,属于早白垩世四川期(135~52Ma)岩浆活动,晚于研究区内主要断层形成的年代。
关键词(KeyWords)： 潘三井田;岩浆岩;同位素定年
基金项目(Foundation): 国家自然科学基金(NO.41173032);; 淮南矿业集团科技计划项目联合资助
作者(Author): 苗林,刘桂建,吴盾,吴斌,陈健
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