摘要
松潘—甘孜造山带在燕山期经历了陆内俯冲是 1∶2 5万甘孜县幅区调中取得的重要认识。本文通过对甘洛沟岩体的时空分布、岩石学、岩石化学、岩石地球化学特征及岩体形成的构造环境等多方面综合分析 ,认为该岩体与区内其它燕山期岩体存在显著区别 ,它是在燕山期陆内俯冲动力学背景下的岩石圈事件———下地壳拆沉的产物。
regional geological surveying in the Garzě sheet shows intracontinental subduction in Songpan-Garzě orogenic belt in the Yanshan Epoch. Space-time distribution, petrologic,petrochemic and petrogeochemic features as well as its geo-tectonic setting indicate that the Ganluogou rockbody,which differs clearly from other Yanshan rockbodies in this region,resulted from decollation of lower crust as a lithospheric event under intracontinental subduction condition in the Yanshan Epoch.
出处
《四川地质学报》
2001年第2期80-85,共6页
Acta Geologica Sichuan
