CAJ | 학술논문

阐述了鄂尔多斯陆块西缘贺兰山地区前寒武纪变质基底赵池沟岩群的分布、岩石地层特征,以及与长城纪盖层、吕梁期花岗岩的接触、侵位关系;并从岩石的宏观构造和镜下残余结构分析入手,进行了变质岩的原岩恢复.最后,用锆石U-Pb定年方法,获得火山沉积岩的形成时代为2 047～2 060 Ma,据此判定赵池沟岩群的形成时代为古元古代.
천술료악이다사륙괴서연하란산지구전한무기변질기저조지구암군적분포、암석지층특정,이급여장성기개층、려량기화강암적접촉、침위관계;병종암석적굉관구조화경하잔여결구분석입수,진행료변질암적원암회복.최후,용고석U-Pb정년방법,획득화산침적암적형성시대위2 047～2 060 Ma,거차판정조지구암군적형성시대위고원고대.
The rock group distribution,lithostratigraphic characteristics were described for Ordos block west margin of Helan Mountain region at Zhaochigou Precambrian metamorphic basement,moreover,the contact and emplacement relationships to Changcheng cap and Luliang granite were also described.Using the analyses to macroscopic structure and microscopic residual structure of rock,the work of original rock recovery for metamorphic rock was completed.Finally,using zircon U-Pb dating method to obtain volcanic sedimentary rocks formed in the 2 047—2 060 Ma,and according the determination,Zhaochigou rock group formed in Paleoproterozoic Era.