胶东半岛和中国东部一些地区一样,在中生代时期发生过频繁的岩浆活动,使胶莱盆地从下白垩世开始至上白垩世这一段时间内,形成了一套多旋回的火山—侵入杂岩。火山岩在盆地内部盖在下白垩世青山组(k_1q_1)之上,仅在盆地四周才直接与元古代粉子山群相接触。据采自莱阳地区的安山岩所测的同位素年龄为119百万年。笔者采自青岛沧 The Jiaodong Peninsula, like some parts of eastern China, experienced frequent magmatic activities in the Mesozoic. During the period from the Late Cretaceous to the Upper Cretaceous, a multi-cycle volcanic-intrusive complex was formed. Volcanic rocks cover the Lower Cretaceous Qingshan Formation (k_1q_1) within the basin and come into direct contact with the Proterozoic Fenzi Shan only around the basin. According to the andesite collected from Laiyang area, the isotopic age was 119 million years. I collected from Qingdao Cang