内蒙古丰镇朱沿沟超单元就位机制

Emplacement Mechanism of Zhuyangou Superunit of Fengzhen,Inner Mongolia

本文对丰镇朱沿沟中侏罗世复式岩体进行分析研究，圈出２６个侵入体，建立了５个单元（连石窑单元、三道洼单元、石堤沟单元、泉子沟单元、西施沟单元）。据各单元之间接触关系、演化特征、同位素年龄，归并为朱沿沟超单元，探讨了岩体就位型式及侵入体就位的构造与应力特征，根据包体变形与片麻理特征讨论了岩体就位机制。

In this paper the authors have analysed and studied the Zhuyangou composite massif ofMiddle Jurassic Epoch.Basing on the field work 26 intrusive bodies are enclosed,and 5 unitsare set up,i.e,Lianshiyao unit,Sandaowa unit,Shidigou unit,Quanzigou unit andXishigou unit.According to the contact relation between various units,and the characteristics of evolution and isotopic age,the Zhuyangou superunit was set up.The authors also dis-cussed the characteristics of forms,structures and stress of intrusive emplacement.In thelight of enclosure deformation and gneissosity characteristic,the tectonic mechanism of rockbody emplacement has been systematically discussed.