The Rb-Sr age and geological implication of alkaline syenitic complex from Liangtun-Kuangdonggou at Gaixian,eastern Liaoning Province  

作　　者：Baoliang Xu Guohan Yan Baolei Mu Linkun Tan Zhongfu He Guangsheng Qiao Renhu Zhang 

机构地区：[1]Peking Univ, Dept Geol, Beijing 100871, Peoples R China [2]Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China

出　　处：《Chinese Science Bulletin》1999年第8期723-725,共3页

摘　　要：Liangtun-Kuangdonggou complex, 30 km southeast of Gaixian Town, Liaoning Province, is composed of aegirine-augite hornblende syenite, aegirine-augite syenite, hornblende syenite, pyroxene syenite and syeno-aegirinolite. Rb-Sr isotopic data to the complex are reported and used for discussion of chronology and geological implication. They show that the complex occurred in early Proterozoic and is a tectonic sign of extension setting. Moreover, the date indicates that the Liaohe Group, which is metamorphic wall rock of the complex, formed over 1 900 Ma ago.Liangtun-Kuangdonggou complex, 30 km southeast of Gaixian Town, Liaoning Province, is composed of aegirine-augite hornblende syenite, aegirine-augite syenite, hornblende syenite, pyroxene syenite and syeno-aegirinolite. Rb-Sr isotopic data to the complex are reported and used for discussion of chronology and geological implication. They show that the complex occurred in early Proterozoic and is a tectonic sign of extension setting. Moreover, the date indicates that the Liaohe Group, which is metamorphic wall rock of the complex, formed over 1 900 Ma ago.

关 键 词：LIAONING Province early PROTEROZOIC ALKALINE SYENITES RB-SR age. 

分 类 号：P588.121[天文地球—岩石学]