摘要
作者对诸广山南体中γ_3~1、γδ_3~1、γ_3~2和γ_5^(2-1)等各期花岗岩进行了同位素年代学综合研究。结果表明,诸广山南体主体岩石是在加里东期形成的。因此,加里东运动对南岭地区的影响是明显的。作者探讨了该岩基新的分期方案及其演化成因模式。
The southern part of the Zhuguangshan Granite Batholith, a typical multi-episode granitoid complex in the sbutheast of China, was dated on the samples of different periods using U-Th-Pb (zircon), Rb-Sr (whole rock and mineral), K-Ar(mineral) techniques. The results indicate that (1) the Fuxi (rδ31), Baimianshi (γ32), Lanhe (r31) and Changjiang (r52-1) granite bodies, of which the Lanhe is probably as old as Late Proterozoic, were' emplaced at about 400-588, 370, 422 and 170 Ma. ago; (2) The ages of source materials of Fuxi and Lanhe bodies are 1200 and 1400 Ma, respectively. It is evident that the principal part of the batholith was formed in the Caledonian period and that the Nanling region had strong response to the Caledonian movement.Based on the data available, the new scheme of geochronological division of and the evolution-origin model for the batholith are also discussed.
出处
《地球化学》
CAS
1987年第2期141-152,共12页
Geochimica
