摘要
白垩纪崂山超单元花岗岩由二长花岗岩、正长花岗岩、碱长花岗岩类组成,自早到晚存在明显的富钾演化特征。根据新的SHRIMP U-Pb锆石定年结果,该超单元早期相浮山亚超单元的浮山二长花岗岩年龄为（120±2）Ma,晚期相崂顶亚超单元的崂山碱长花岗岩年龄为（114±2）Ma。所以,可把崂山超单元花岗岩时代限定在110～120 Ma之间（早白垩世）,其形成与华北克拉通岩石圈减薄有关。
Granites in Cretaceous Laoshan superunitis composed of monzogranite,syenite granite and alkali feldspar granite.It has obvious characteristics of K-rich evolution from the early to late period.According to new SHRIMP U-Pb zircon dating results,the age of Fushan monzogranite in Xiangfushan sub-superunit in early period of Laoshan superunit is（120±2） Ma,while the forming age of alkali feldspar in the late period of Laoshan superunit is（114±2） Ma.Thus,the forming age of granites in Laoshan superunit can be determined as 110～120Ma（early Cretaceous）.Its formation has close relation with lithospheric thinning of the north China craton.
出处
《山东国土资源》
2010年第10期1-5,10,共6页
Shandong Land and Resources
基金
山东省地质系列图件编制与综合研究项目(1212010811029)
北京离子探针中心基础研究项目的资助.
