摘要
小秦岭、崤山地区第二轮１∶５万区调查明，两地区晚太古代基底变质岩系均包括变质表壳岩系和变质花岗岩系。据此划分了构造岩石地层单位和构造岩石单位。根据其间的层序、时序关系，建立了各自统一的地层—岩石柱，拟出了新的划分对比方案。指出小秦岭地区观音堂组与崤山地区杨寺沟岩组是同一次沉积事件的产物，应属同一构造岩石地层单位，可作为区域对比的标志层位。根据接触关系，将小秦岭地区呈异岩不整合伏于观音堂组之下的变质花岗岩系划属晚太古代阜平期花岗岩，将崤山地区侵入于杨寺沟岩组的变质花岗岩系划属晚太古代五台期花岗岩。
ccording to the regional geological survey on scale of 1∶50 000 belonging to the second round in Xiaoqinling and Xiaoshan regions,Late Archaeozoic basement metamorphic rock series of two regions have all included the metamorphic supracrustal rock series and metamorphic granite series.Accordingly,the structural rockstratigraphic unit and tectonic rock unit have been divided.On the basis of sequence and chronogenesis relationship between them,the author has established the respective unitized stratarock column,and proposed the new scheme of division and correlation.The Guanyintang Formation in Xiaoqinling region and the Yangsigou Rock Formation in Xiaoshan region are the result of same sedimentary event,they can belong to the same structural rockstratigraphic unit and take it as the indicator horizon of regional correlation.On the basis of contact relation,the Guanyintang Formation is underlain in the heteropic unconformity by the metamorphic granite series belonged the Fuping Age of Late Archaeozoic in Xiaoqinling region,and the metamorphic granite series intruding into the Yangsigou Rock Formation of Xiaoshan region have been classed as the Wutai Age of Late Archaeozoic.
出处
《河南地质》
1998年第2期106-113,共8页
Henan Geology
关键词
晚太古代
变质岩系
地层
岩石柱
划分
对比
Late Archaeozoic,basement metamorphic rock series,stratarock column,division and correlation,Xiaoqinling,Xiaoshan
