Paleoproterozoic Potassic Granitoids in the Sushui Complex from the Zhongtiao Mountains,Northern China:Geochronology,Geochemistry and Petrogenesis  

作　　者：TIAN Wei LIU Shuwen ZHANG Huafeng 

机构地区：[1]Key Laboratory of Orogenic Belt and Crustal Evolution of the Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871 [2]State Key Laboratory of Geo-Processes and Mineral Resources, China University of Geosciences, Beijing 100083

出　　处：《Acta Geologica Sinica(English Edition)》2006年第6期875-885,共11页地质学报（英文版）

基　　金：This study was financially supported by the National Natural Science Foundation of China （Grant Nos. 40412012035 and 40511140503）.

摘　　要：Paleoproterozoic potassic granitoids in the southern Sushui Complex from the Zhongtiao Mountains yielded SHRIMP zircon U-Pb ages of 1968-1944 Ma. Lithologically, the potassic granitoid series consists chiefly of monzodiorite, quartz monzonite and syenogranite. Their trace elements and Sm-Nd isotope characteristics indicate that they were derived from partial melting of Archean TTG rocks in an overthickened continental crust. Petrogenesis of this potassic granitoid series implies a collisional environment within the Trans-North China Orogen in the Paleoproterozoic, which supports a tectonic model of Eastern and Western Continental Blocks being amalgamated in the Paleoproterozoic.Paleoproterozoic potassic granitoids in the southern Sushui Complex from the Zhongtiao Mountains yielded SHRIMP zircon U-Pb ages of 1968-1944 Ma. Lithologically, the potassic granitoid series consists chiefly of monzodiorite, quartz monzonite and syenogranite. Their trace elements and Sm-Nd isotope characteristics indicate that they were derived from partial melting of Archean TTG rocks in an overthickened continental crust. Petrogenesis of this potassic granitoid series implies a collisional environment within the Trans-North China Orogen in the Paleoproterozoic, which supports a tectonic model of Eastern and Western Continental Blocks being amalgamated in the Paleoproterozoic.

关 键 词：Sushui Complex Zhongtiao Block Trans-North China Orogen potassic granitoid zircon U-Pb Sm-Nd isotope PALEOPROTEROZOIC 

分 类 号：P588.121[天文地球—岩石学] P584[天文地球—地质学]