【摘要】 对如意亭剖面鹅湖岭组与打鼓顶组的界线进行了重新厘定，对早晚两个火山活动旋回火山岩的化学成分、稀土配分特征进行了比较，得出了两旋回火山岩系属同一岩浆源的不同阶段演化产物的认识。同时，指出了两旋回间及早旋回与基底之间的界面是相山火山塌陷中的两个滑脱面，它们分别被花岗斑岩和流纹英安斑岩所侵位，构成了相山火山塌陷盆地东北部及西北部的半环状构造更多还原

【Abstract】 The border of Ehuling group and Daguding group was renewed.it concluded that volcano rocks of former subcycle and latter subcycle volcanic activities all came from the same source of magma,according to their chemical compositions and their chondrite normalized REE patterns.It pointed out that meanwhile,the borders between Ehuling group and Daguding group and underlay-layer,which were invaded by granite porphyry and rhyodacite porphyry,respectively,were two shiole faces of the volcano subside and they comprised the half round structure of east northern and westrorthem of xiangshan basin.更多还原