大兴安岭中生代火山岩地层对比  

Corresponding Relations of Mesozoic Volcanic Formations in the Da Hinggan Mountains

作　　者：周其林[1] 王献忠[1] 吉峰 刘智杰[1] 刘涛[1] 赵炳新[1] 怀宝峰[1] 李德新[1] 表尚虎 

机构地区：[1]武警黄金第三支队,哈尔滨150086 [2]大庆油田采油三场,黑龙江大庆163000

出　　处：《地质论评》2013年第6期1077-1084,共8页Geological Review

基　　金：中国地质调查局资[2013](1212011120684)"黑龙江省大兴安岭富西里地区1:5万地质矿产调查项目"成果

摘　　要：大兴安岭中生代火山岩分布区植被覆盖严重,地层间接触关系不明,再加上缺乏古生物年代学资料,其填图单位的归属及形成时代问题一直是该地区研究的重点和争论的焦点。传统上该套火山岩地层的归属主要依据岩石组合的对比,且因对其认知的所限同一填图单位常赋予不同名称。该文首先介绍了大兴安岭中生代火山岩地层对比沿革,之后通过对近些年区域上的研究成果的综合研究,以中国地质调查局在承德召集的中生代火山岩地层研讨会议上张立东提出的地层柱的基础上进行了对比和厘定。该套方案主要以最新的Ar-Ar法、锆石SHRIMP、LA-ICP-MS U-Pb法等测年资料为基础,以双峰式火山岩成因为岩浆演化理论,归并为早期、中期、晚期,并遵从了地层学优先命名法则,提出了新的地层柱。Mesozoic volcanic rock areas of Da Hinggan Mountains have been covered by plants, and its contact relationship of the stratigraphic units was unknown with less of paleontological chronology material, which makes it very hard to determine the ownership and forming times of geological units. Traditionally, we classify the stratigraphic units of this area by contrasting rocks combination and often give different names for the same mapping unit because of limited cognition. In this article, we firstly introduced the evolution history of Mesozoic volcanic stratigraphic units contrasts of Da Hinggan Mountains, secondly compared the stratigraphic units and set based on stratigraphic column which was put forward by Zhang Lidong in the Mesozoic volcanic stratigraphic units discussion meeting which was called by the geological survey of China in the city Chengde. According to the theory of bi-model volcanic origin and evolution and the latest chronology measurement means, such as U-Pb,Ar-Ar and others, we put forward new stratigraphic column and divided it into three stages of early, middle and late, which complied with the naming rule of stratigraphy priority.

关 键 词：火山岩地层对比 锆石测年 双峰式火山岩 大兴安岭 

分 类 号：P588.14[天文地球—岩石学]