摘要
五台山北坡的车厂岩体出露面积达５００ｋｍ￣２，据分析，仅为一厚不足４ｋｍ的岩席。其顶板（北界）是金刚库组，底板为五台山主峰地带的绿片岩。该岩席与围岩没有明显的热交换反应，侵入时温度很低，可能呈固态侵位。岩体的接触带岩石已全部糜棱岩化，含角砾状捕虏体，大捕虏体多在韧性剪切边界与岩体接触带附近，说明岩席的侵位机制可能是地层受力后片理张开为其贯入提供了空间；张开过程中巨大的负压和岩浆房受挤的联合作用为侵位提供了动力来源。
The outcropped area of Chechang magmatic body of northern Wutaishan covers 500km￣2, According to the field observation,it is only a sheet with a thickness of less than 4km. The roof(northern boudary)is Jingangku Group,and the footwall is greenschist inWutaishan highest peak region. The sheet did not show any obvious thermal metasomatismwith the surrounding rock,so the intrusion temperature is very low,and is probably solidemplacement.The rocks near contact zone are all mylonitized,and the brecciform xenolithsare mainly found in contact of magmatic body and boundary of ductile shear,this phe-nomenon may be an evidence of solid emplacement.The emplacement mechanism may berecognized as that after the stratum had been pressed,the tension gapping of schistosityprovided space for sheet injection. The combined actions of big negative pressure dischargedfrom tension and that of magma chamber pressed provided the dynamic source for emplace-memt.
