关于辽西北票地区兴隆沟组火山岩时代的再认识  

The age of volcanic rocks of the Xinglonggou Formation in Beipiao,western Liaoning,China:Revisited

作　　者：邵济安[1] 杨蔚[2] 

机构地区：[1]北京大学地球与空间学院,造山带与地壳演化教育部重点实验室,北京100871 [2]中国科学院地质与地球物理研究所,岩石圈演化国家重点实验室,北京100029

出　　处：《地质通报》2008年第6期912-916,共5页Geological Bulletin of China

基　　金：国家自然科学基金项目(编号:90714008、40372103);中国科学院矿产资源研究重点实验室项目资助

摘　　要：针对近年来关于兴隆沟组火山岩同位素年龄及地层归属方面存在的分歧,通过详细的地质填图已查清,近年报道的2组U-Pb同位素年龄均为贯穿兴隆沟组火山-沉积地层的霏细斑岩脉年龄,兴隆沟组地层仍应归属为下侏罗统。In recent years there have existed divergent views about the isotopic ages of volcanic rocks of the Xinglonggou Formation and assignment of the strata. Through detailed geological mapping, the authors have ascertained that the two groups of U-Pb ages reported in recent years are both those of felsophyre dikes that penetrate the volcanic-sedimentary strata of the Xinglonggou Formation in this area and that the Xinglonggou Formation should be still assigned to the Lower Jurassic.

关 键 词：辽西北票地区 兴隆沟组火山岩 同位素年龄 霏细宽岩脉 

分 类 号：P534.52[天文地球—古生物学与地层学]