U-PB ZIRCON AGES OF TIANZHUSHAN GRANITES IN THE EASTERN DABIE OROGEN AND THEIR GEOLOGICAL IMPLICATIONS

作     者：Ge Ningjie(Department of Earth and space sciences, University of Science and Technology of China, Hefei, 230026)Wu Weiping (Anhui institute of Geological science)Liu Bin (Department of Earth and space sciences, University of Science and Technology of Chin 

出 版 物：《Scientia Geologica Sinica》 (地质科学(英文版))

年 卷 期：1998年第4期

页      面：521-525页

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

主　　题：Pb U-PB ZIRCON AGES OF TIANZHUSHAN GRANITES IN THE EASTERN DABIE OROGEN AND THEIR GEOLOGICAL IMPLICATIONS Wang 

摘      要：The precise U-Ph zircon dating of Tianzhushan granites indicates. the emplacement age of the intrusion is127 Ma. It is one part of the Large-scale magmatic emplacement in the extension environment after thecollision betWeen Yangtze Block (YB) and North China Block (NCB), and is belonged to the granitesformed after collision orogens. This large-scale tectonic magma event not only caused the emplacement ofgranitic intrusion and led to intense metamorphism and deformation of the rocks in Dabie area, but alsoplayed a very important role for the Dabie ultrahigh pressure (UHP) metamorphic rocks ultimatelyreturning to the each surface.